[v1,2/4] x86: Move strcmp SSE2 implementation to multiarch/strcmp-sse2.S

Message ID	20220712192808.335531-2-goldstein.w.n@gmail.com
State	New
Headers	show Return-Path: <libc-alpha-bounces+incoming=patchwork.ozlabs.org@sourceware.org> DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 2AC303856978 To: libc-alpha@sourceware.org Subject: [PATCH v1 2/4] x86: Move strcmp SSE2 implementation to multiarch/strcmp-sse2.S Date: Tue, 12 Jul 2022 12:28:06 -0700 Message-Id: <20220712192808.335531-2-goldstein.w.n@gmail.com> In-Reply-To: <20220712192808.335531-1-goldstein.w.n@gmail.com> References: <20220712192808.335531-1-goldstein.w.n@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: list From: Noah Goldstein via Libc-alpha <libc-alpha@sourceware.org> Reply-To: Noah Goldstein <goldstein.w.n@gmail.com> Errors-To: libc-alpha-bounces+incoming=patchwork.ozlabs.org@sourceware.org Sender: "Libc-alpha" <libc-alpha-bounces+incoming=patchwork.ozlabs.org@sourceware.org>
Series	[v1,1/4] x86: Rename STRCASECMP_NONASCII macro to STRCASECMP_L_NONASCII \| expand [v1,1/4] x86: Rename STRCASECMP_NONASCII macro to STRCASECMP_L_NONASCII [v1,2/4] x86: Move strcmp SSE2 implementation to multiarch/strcmp-sse2.S [v1,3/4] x86: Move wcscmp SSE2 implementation to multiarch/wcscmp-sse2.S [v1,4/4] x86: Move strcmp SSE42 implementation to multiarch/strcmp-sse4_2.S

On Tue, Jul 12, 2022 at 12:28 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote: > > This commit doesn't affect libc.so.6, its just housekeeping to prepare > for adding explicit ISA level support. > > Because strcmp-sse2.S implements so many functions (more from > avx2/evex/sse42) add a new file 'strcmp-naming.h' to assist in > getting the correct symbol name for all the function across > multiarch/non-multiarch builds. > > Tested build on x86_64 and x86_32 with/without multiarch. > --- > sysdeps/x86_64/multiarch/rtld-strcmp.S | 18 + > sysdeps/x86_64/multiarch/rtld-strncmp.S | 18 + > sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S | 5 +- > sysdeps/x86_64/multiarch/strcmp-naming.h | 68 + > sysdeps/x86_64/multiarch/strcmp-sse2.S | 2140 ++++++++++++++++- > sysdeps/x86_64/multiarch/strncase_l-sse2.S | 5 +- > sysdeps/x86_64/multiarch/strncmp-sse2.S | 12 +- > sysdeps/x86_64/strcasecmp_l.S | 11 +- > sysdeps/x86_64/strcmp.S | 2147 +----------------- > sysdeps/x86_64/strncase_l.S | 11 +- > sysdeps/x86_64/strncmp.S | 7 +- > 11 files changed, 2264 insertions(+), 2178 deletions(-) > create mode 100644 sysdeps/x86_64/multiarch/rtld-strcmp.S > create mode 100644 sysdeps/x86_64/multiarch/rtld-strncmp.S > create mode 100644 sysdeps/x86_64/multiarch/strcmp-naming.h > > diff --git a/sysdeps/x86_64/multiarch/rtld-strcmp.S b/sysdeps/x86_64/multiarch/rtld-strcmp.S > new file mode 100644 > index 0000000000..207078bdcc > --- /dev/null > +++ b/sysdeps/x86_64/multiarch/rtld-strcmp.S > @@ -0,0 +1,18 @@ > +/* Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include "../strcmp.S" > diff --git a/sysdeps/x86_64/multiarch/rtld-strncmp.S b/sysdeps/x86_64/multiarch/rtld-strncmp.S > new file mode 100644 > index 0000000000..ac32150406 > --- /dev/null > +++ b/sysdeps/x86_64/multiarch/rtld-strncmp.S > @@ -0,0 +1,18 @@ > +/* Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + <https://www.gnu.org/licenses/>. */ > + > +#include "../strncmp.S" > diff --git a/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S b/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S > index 2360d104dd..a2b5741399 100644 > --- a/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S > +++ b/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S > @@ -16,8 +16,5 @@ > License along with the GNU C Library; if not, see > <https://www.gnu.org/licenses/>. */ > > -#define STRCMP __strcasecmp_l_sse2 > #define USE_AS_STRCASECMP_L > -#define NO_NOLOCALE_ALIAS > -#define __strcasecmp __strcasecmp_sse2 > -#include <sysdeps/x86_64/strcmp.S> > +#include "strcmp-sse2.S" > diff --git a/sysdeps/x86_64/multiarch/strcmp-naming.h b/sysdeps/x86_64/multiarch/strcmp-naming.h > new file mode 100644 > index 0000000000..6a7529b6a4 > --- /dev/null > +++ b/sysdeps/x86_64/multiarch/strcmp-naming.h > @@ -0,0 +1,68 @@ > +#ifndef _STRCMP_NAMING_H_ > +#define _STRCMP_NAMING_H_ > + > +/* Utility macros. */ > +#define STRCMP_SUFFIX(x, y) x##y > +#define STRCMP_NAME(x, y) STRCMP_SUFFIX (x, y) > + > +/* Setup base of all definitions. */ > +#define STRNCASECMP_BASE __strncasecmp > +#define STRCASECMP_BASE __strcasecmp > +#define WCSCMP_BASE __wcscmp > + > +#if defined USE_MULTIARCH && IS_IN (libc) > +# define WCSNCMP_BASE __wcsncmp > +# define STRNCMP_BASE __strncmp > +# define STRCMP_BASE __strcmp > + > +#else > +/* Covers IS_IN (rtld) or non-multiarch build. */ > +# define WCSNCMP_BASE wcsncmp > +# define STRNCMP_BASE strncmp > +# define STRCMP_BASE strcmp > + > +# undef STRCMP_ISA > +# define STRCMP_ISA > +#endif > + > +#if IS_IN (rtld) || defined USE_MULTIARCH > +# define ISA_HIDDEN_JUMPTARGET(...) __VA_ARGS__ > +#else > +# define ISA_HIDDEN_JUMPTARGET(...) HIDDEN_JUMPTARGET (__VA_ARGS__) > +#endif > + > +/* Get correct symbol for OVERFLOW_STRCMP, STRCMP, and > + STRCASECMP. */ > +#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + > +# if defined USE_AS_WCSCMP || defined USE_AS_WCSNCMP > +# define OVERFLOW_STRCMP_SYM WCSCMP_BASE > +# define STRCMP_SYM WCSNCMP_BASE > +# elif defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > +# define OVERFLOW_STRCMP_SYM STRCMP_NAME (STRCASECMP_BASE, _l) > +# define STRCMP_SYM STRCMP_NAME (STRNCASECMP_BASE, _l) > +# else > +# define OVERFLOW_STRCMP_SYM STRCMP_BASE > +# define STRCMP_SYM STRNCMP_BASE > +# endif > + > +# define STRCASECMP_SYM STRNCASECMP_BASE > +# define OVERFLOW_STRCMP \ > + ISA_HIDDEN_JUMPTARGET (STRCMP_NAME (OVERFLOW_STRCMP_SYM, STRCMP_ISA)) > +#else > +# ifdef USE_AS_WCSCMP > +# define STRCMP_SYM WCSCMP_BASE > +# elif defined USE_AS_STRCASECMP_L > +# define STRCMP_SYM STRCMP_NAME (STRCASECMP_BASE, _l) > +# else > +# define STRCMP_SYM STRCMP_BASE > +# endif > + > +# define STRCASECMP_SYM STRCASECMP_BASE > +#endif > + > +#define STRCASECMP_L_NONASCII STRCMP_NAME (STRCASECMP_SYM, _l_nonascii) > +#define STRCASECMP STRCMP_NAME (STRCASECMP_SYM, STRCMP_ISA) > +#define STRCMP STRCMP_NAME (STRCMP_SYM, STRCMP_ISA) > + > +#endif > diff --git a/sysdeps/x86_64/multiarch/strcmp-sse2.S b/sysdeps/x86_64/multiarch/strcmp-sse2.S > index b8f95e59cf..b1220231ab 100644 > --- a/sysdeps/x86_64/multiarch/strcmp-sse2.S > +++ b/sysdeps/x86_64/multiarch/strcmp-sse2.S > @@ -16,13 +16,2141 @@ > License along with the GNU C Library; if not, see > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > +#if IS_IN (libc) || IS_IN (rtld) > + > +# define STRCMP_ISA _sse2 > +# include "strcmp-naming.h" > + > # include <sysdep.h> > > -# define STRCMP __strcmp_sse2 > +# undef UPDATE_STRNCMP_COUNTER > > -# undef libc_hidden_builtin_def > -# define libc_hidden_builtin_def(strcmp) > -#endif > +# ifndef LABEL > +# define LABEL(l) L(l) > +# endif > + > +# ifdef USE_AS_STRNCMP > +/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz > + if the new counter > the old one or is 0. */ > +# define UPDATE_STRNCMP_COUNTER \ > + /* calculate left number to compare */ \ > + lea -16(%rcx, %r11), %r9; \ > + cmp %r9, %r11; \ > + jb LABEL(strcmp_exitz); \ > + test %r9, %r9; \ > + je LABEL(strcmp_exitz); \ > + mov %r9, %r11 > + > +# elif defined USE_AS_STRCASECMP_L > +# include "locale-defines.h" > + > +# define UPDATE_STRNCMP_COUNTER > +# elif defined USE_AS_STRNCASECMP_L > +# include "locale-defines.h" > + > +# define UPDATE_STRNCMP_COUNTER \ > + /* calculate left number to compare */ \ > + lea -16(%rcx, %r11), %r9; \ > + cmp %r9, %r11; \ > + jb LABEL(strcmp_exitz); \ > + test %r9, %r9; \ > + je LABEL(strcmp_exitz); \ > + mov %r9, %r11 > +# else > +# define UPDATE_STRNCMP_COUNTER > +# endif > + > + .text > +# ifdef USE_AS_STRCASECMP_L > +# ifndef ENTRY2 > +# define ENTRY2(name) ENTRY (name) > +# define END2(name) END (name) > +# endif > + > +ENTRY2 (STRCASECMP) > + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax > + mov %fs:(%rax),%RDX_LP > + > + /* Either 1 or 5 bytes (dependeing if CET is enabled). */ > + .p2align 4 > +END2 (STRCASECMP) > + /* FALLTHROUGH to strcasecmp_l. */ > +# elif defined USE_AS_STRNCASECMP_L > +# ifndef ENTRY2 > +# define ENTRY2(name) ENTRY (name) > +# define END2(name) END (name) > +# endif > + > +ENTRY2 (STRCASECMP) > + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax > + mov %fs:(%rax),%RCX_LP > + > + /* Either 1 or 5 bytes (dependeing if CET is enabled). */ > + .p2align 4 > +END2 (STRCASECMP) > + /* FALLTHROUGH to strncasecmp_l. */ > +# endif > + > +ENTRY (STRCMP) > +# ifdef USE_AS_STRCASECMP_L > + /* We have to fall back on the C implementation for locales > + with encodings not matching ASCII for single bytes. */ > +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 > + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP > +# else > + mov (%rdx), %RAX_LP > +# endif > + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) > + jne __strcasecmp_l_nonascii > +# elif defined USE_AS_STRNCASECMP_L > + /* We have to fall back on the C implementation for locales > + with encodings not matching ASCII for single bytes. */ > +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 > + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP > +# else > + mov (%rcx), %RAX_LP > +# endif > + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) > + jne __strncasecmp_l_nonascii > +# endif > + > +/* > + * This implementation uses SSE to compare up to 16 bytes at a time. > + */ > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + test %RDX_LP, %RDX_LP > + je LABEL(strcmp_exitz) > + cmp $1, %RDX_LP > + je LABEL(Byte0) > + mov %RDX_LP, %R11_LP > +# endif > + mov %esi, %ecx > + mov %edi, %eax > +/* Use 64bit AND here to avoid long NOP padding. */ > + and $0x3f, %rcx /* rsi alignment in cache line */ > + and $0x3f, %rax /* rdi alignment in cache line */ > +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > + .section .rodata.cst16,"aM",@progbits,16 > + .align 16 > +.Llcase_min: > + .quad 0x3f3f3f3f3f3f3f3f > + .quad 0x3f3f3f3f3f3f3f3f > +.Llcase_max: > + .quad 0x9999999999999999 > + .quad 0x9999999999999999 > +.Lcase_add: > + .quad 0x2020202020202020 > + .quad 0x2020202020202020 > + .previous > + movdqa .Llcase_min(%rip), %xmm5 > +# define LCASE_MIN_reg %xmm5 > + movdqa .Llcase_max(%rip), %xmm6 > +# define LCASE_MAX_reg %xmm6 > + movdqa .Lcase_add(%rip), %xmm7 > +# define CASE_ADD_reg %xmm7 > +# endif > + cmp $0x30, %ecx > + ja LABEL(crosscache) /* rsi: 16-byte load will cross cache line */ > + cmp $0x30, %eax > + ja LABEL(crosscache) /* rdi: 16-byte load will cross cache line */ > + movlpd (%rdi), %xmm1 > + movlpd (%rsi), %xmm2 > + movhpd 8(%rdi), %xmm1 > + movhpd 8(%rsi), %xmm2 > +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > +# define TOLOWER(reg1, reg2) \ > + movdqa LCASE_MIN_reg, %xmm8; \ > + movdqa LCASE_MIN_reg, %xmm9; \ > + paddb reg1, %xmm8; \ > + paddb reg2, %xmm9; \ > + pcmpgtb LCASE_MAX_reg, %xmm8; \ > + pcmpgtb LCASE_MAX_reg, %xmm9; \ > + pandn CASE_ADD_reg, %xmm8; \ > + pandn CASE_ADD_reg, %xmm9; \ > + paddb %xmm8, reg1; \ > + paddb %xmm9, reg2 > + TOLOWER (%xmm1, %xmm2) > +# else > +# define TOLOWER(reg1, reg2) > +# endif > + pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */ > + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > + pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */ > + psubb %xmm0, %xmm1 /* packed sub of comparison results*/ > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */ > + jnz LABEL(less16bytes) /* If not, find different value or null char */ > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) /* finish comparision */ > +# endif > + add $16, %rsi /* prepare to search next 16 bytes */ > + add $16, %rdi /* prepare to search next 16 bytes */ > + > + /* > + * Determine source and destination string offsets from 16-byte alignment. > + * Use relative offset difference between the two to determine which case > + * below to use. > + */ > + .p2align 4 > +LABEL(crosscache): > + and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */ > + and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */ > + mov $0xffff, %edx /* for equivalent offset */ > + xor %r8d, %r8d > + and $0xf, %ecx /* offset of rsi */ > + and $0xf, %eax /* offset of rdi */ > + cmp %eax, %ecx > + je LABEL(ashr_0) /* rsi and rdi relative offset same */ > + ja LABEL(bigger) > + mov %edx, %r8d /* r8d is offset flag for exit tail */ > + xchg %ecx, %eax > + xchg %rsi, %rdi > +LABEL(bigger): > + lea 15(%rax), %r9 > + sub %rcx, %r9 > + lea LABEL(unaligned_table)(%rip), %r10 > + movslq (%r10, %r9,4), %r9 > + lea (%r10, %r9), %r10 > + _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ > + > +/* > + * The following cases will be handled by ashr_0 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(0~15) n(0~15) 15(15+ n-n) ashr_0 > + */ > + .p2align 4 > +LABEL(ashr_0): > + > + movdqa (%rsi), %xmm1 > + pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ > + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L > + pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */ > +# else > + movdqa (%rdi), %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */ > +# endif > + psubb %xmm0, %xmm1 /* packed sub of comparison results*/ > + pmovmskb %xmm1, %r9d > + shr %cl, %edx /* adjust 0xffff for offset */ > + shr %cl, %r9d /* adjust for 16-byte offset */ > + sub %r9d, %edx > + /* > + * edx must be the same with r9d if in left byte (16-rcx) is equal to > + * the start from (16-rax) and no null char was seen. > + */ > + jne LABEL(less32bytes) /* mismatch or null char */ > + UPDATE_STRNCMP_COUNTER > + mov $16, %rcx > + mov $16, %r9 > + pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ > + > + /* > + * Now both strings are aligned at 16-byte boundary. Loop over strings > + * checking 32-bytes per iteration. > + */ > + .p2align 4 > +LABEL(loop_ashr_0): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) /* mismatch or null char seen */ > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + add $16, %rcx > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + add $16, %rcx > + jmp LABEL(loop_ashr_0) > + > +/* > + * The following cases will be handled by ashr_1 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(15) n -15 0(15 +(n-15) - n) ashr_1 > + */ > + .p2align 4 > +LABEL(ashr_1): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > + pslldq $15, %xmm2 /* shift first string to align with second */ > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */ > + psubb %xmm0, %xmm2 /* packed sub of comparison results*/ > + pmovmskb %xmm2, %r9d > + shr %cl, %edx /* adjust 0xffff for offset */ > + shr %cl, %r9d /* adjust for 16-byte offset */ > + sub %r9d, %edx > + jnz LABEL(less32bytes) /* mismatch or null char seen */ > + movdqa (%rdi), %xmm3 > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads*/ > + mov $1, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 1(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_1): > + add $16, %r10 > + jg LABEL(nibble_ashr_1) /* cross page boundary */ > + > +LABEL(gobble_ashr_1): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 /* store for next cycle */ > + > + psrldq $1, %xmm3 > + pslldq $15, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_1) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 /* store for next cycle */ > + > + psrldq $1, %xmm3 > + pslldq $15, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_1) > + > + /* > + * Nibble avoids loads across page boundary. This is to avoid a potential > + * access into unmapped memory. > + */ > + .p2align 4 > +LABEL(nibble_ashr_1): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char*/ > + pmovmskb %xmm0, %edx > + test $0xfffe, %edx > + jnz LABEL(ashr_1_exittail) /* find null char*/ > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $15, %r11 > + jbe LABEL(ashr_1_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 /* substract 4K from %r10 */ > + jmp LABEL(gobble_ashr_1) > + > + /* > + * Once find null char, determine if there is a string mismatch > + * before the null char. > + */ > + .p2align 4 > +LABEL(ashr_1_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $1, %xmm0 > + psrldq $1, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_2 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(14~15) n -14 1(15 +(n-14) - n) ashr_2 > + */ > + .p2align 4 > +LABEL(ashr_2): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $14, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $2, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 2(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_2): > + add $16, %r10 > + jg LABEL(nibble_ashr_2) > + > +LABEL(gobble_ashr_2): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $2, %xmm3 > + pslldq $14, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_2) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $2, %xmm3 > + pslldq $14, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_2) > + > + .p2align 4 > +LABEL(nibble_ashr_2): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xfffc, %edx > + jnz LABEL(ashr_2_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $14, %r11 > + jbe LABEL(ashr_2_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_2) > + > + .p2align 4 > +LABEL(ashr_2_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $2, %xmm0 > + psrldq $2, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_3 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(13~15) n -13 2(15 +(n-13) - n) ashr_3 > + */ > + .p2align 4 > +LABEL(ashr_3): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $13, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $3, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 3(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_3): > + add $16, %r10 > + jg LABEL(nibble_ashr_3) > + > +LABEL(gobble_ashr_3): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $3, %xmm3 > + pslldq $13, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_3) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $3, %xmm3 > + pslldq $13, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_3) > + > + .p2align 4 > +LABEL(nibble_ashr_3): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xfff8, %edx > + jnz LABEL(ashr_3_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $13, %r11 > + jbe LABEL(ashr_3_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_3) > + > + .p2align 4 > +LABEL(ashr_3_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $3, %xmm0 > + psrldq $3, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_4 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(12~15) n -12 3(15 +(n-12) - n) ashr_4 > + */ > + .p2align 4 > +LABEL(ashr_4): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $12, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $4, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 4(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_4): > + add $16, %r10 > + jg LABEL(nibble_ashr_4) > + > +LABEL(gobble_ashr_4): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $4, %xmm3 > + pslldq $12, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_4) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $4, %xmm3 > + pslldq $12, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_4) > + > + .p2align 4 > +LABEL(nibble_ashr_4): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xfff0, %edx > + jnz LABEL(ashr_4_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $12, %r11 > + jbe LABEL(ashr_4_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_4) > + > + .p2align 4 > +LABEL(ashr_4_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $4, %xmm0 > + psrldq $4, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_5 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5 > + */ > + .p2align 4 > +LABEL(ashr_5): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $11, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $5, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 5(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_5): > + add $16, %r10 > + jg LABEL(nibble_ashr_5) > + > +LABEL(gobble_ashr_5): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $5, %xmm3 > + pslldq $11, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_5) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $5, %xmm3 > + pslldq $11, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_5) > + > + .p2align 4 > +LABEL(nibble_ashr_5): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xffe0, %edx > + jnz LABEL(ashr_5_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $11, %r11 > + jbe LABEL(ashr_5_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_5) > + > + .p2align 4 > +LABEL(ashr_5_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $5, %xmm0 > + psrldq $5, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_6 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6 > + */ > + .p2align 4 > +LABEL(ashr_6): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $10, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $6, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 6(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_6): > + add $16, %r10 > + jg LABEL(nibble_ashr_6) > + > +LABEL(gobble_ashr_6): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $6, %xmm3 > + pslldq $10, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_6) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $6, %xmm3 > + pslldq $10, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_6) > + > + .p2align 4 > +LABEL(nibble_ashr_6): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xffc0, %edx > + jnz LABEL(ashr_6_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $10, %r11 > + jbe LABEL(ashr_6_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_6) > + > + .p2align 4 > +LABEL(ashr_6_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $6, %xmm0 > + psrldq $6, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_7 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7 > + */ > + .p2align 4 > +LABEL(ashr_7): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $9, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $7, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 7(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_7): > + add $16, %r10 > + jg LABEL(nibble_ashr_7) > + > +LABEL(gobble_ashr_7): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $7, %xmm3 > + pslldq $9, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_7) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $7, %xmm3 > + pslldq $9, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_7) > + > + .p2align 4 > +LABEL(nibble_ashr_7): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xff80, %edx > + jnz LABEL(ashr_7_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $9, %r11 > + jbe LABEL(ashr_7_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_7) > + > + .p2align 4 > +LABEL(ashr_7_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $7, %xmm0 > + psrldq $7, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_8 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8 > + */ > + .p2align 4 > +LABEL(ashr_8): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $8, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $8, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 8(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_8): > + add $16, %r10 > + jg LABEL(nibble_ashr_8) > + > +LABEL(gobble_ashr_8): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $8, %xmm3 > + pslldq $8, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > > -#include <sysdeps/x86_64/strcmp.S> > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_8) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $8, %xmm3 > + pslldq $8, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_8) > + > + .p2align 4 > +LABEL(nibble_ashr_8): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xff00, %edx > + jnz LABEL(ashr_8_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $8, %r11 > + jbe LABEL(ashr_8_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_8) > + > + .p2align 4 > +LABEL(ashr_8_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $8, %xmm0 > + psrldq $8, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_9 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9 > + */ > + .p2align 4 > +LABEL(ashr_9): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $7, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $9, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 9(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_9): > + add $16, %r10 > + jg LABEL(nibble_ashr_9) > + > +LABEL(gobble_ashr_9): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $9, %xmm3 > + pslldq $7, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_9) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $9, %xmm3 > + pslldq $7, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 /* store for next cycle */ > + jmp LABEL(loop_ashr_9) > + > + .p2align 4 > +LABEL(nibble_ashr_9): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xfe00, %edx > + jnz LABEL(ashr_9_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $7, %r11 > + jbe LABEL(ashr_9_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_9) > + > + .p2align 4 > +LABEL(ashr_9_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $9, %xmm0 > + psrldq $9, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_10 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10 > + */ > + .p2align 4 > +LABEL(ashr_10): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $6, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $10, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 10(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_10): > + add $16, %r10 > + jg LABEL(nibble_ashr_10) > + > +LABEL(gobble_ashr_10): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $10, %xmm3 > + pslldq $6, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_10) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $10, %xmm3 > + pslldq $6, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_10) > + > + .p2align 4 > +LABEL(nibble_ashr_10): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xfc00, %edx > + jnz LABEL(ashr_10_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $6, %r11 > + jbe LABEL(ashr_10_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_10) > + > + .p2align 4 > +LABEL(ashr_10_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $10, %xmm0 > + psrldq $10, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_11 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11 > + */ > + .p2align 4 > +LABEL(ashr_11): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $5, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $11, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 11(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_11): > + add $16, %r10 > + jg LABEL(nibble_ashr_11) > + > +LABEL(gobble_ashr_11): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $11, %xmm3 > + pslldq $5, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_11) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $11, %xmm3 > + pslldq $5, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_11) > + > + .p2align 4 > +LABEL(nibble_ashr_11): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xf800, %edx > + jnz LABEL(ashr_11_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $5, %r11 > + jbe LABEL(ashr_11_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_11) > + > + .p2align 4 > +LABEL(ashr_11_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $11, %xmm0 > + psrldq $11, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_12 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12 > + */ > + .p2align 4 > +LABEL(ashr_12): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $4, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $12, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 12(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_12): > + add $16, %r10 > + jg LABEL(nibble_ashr_12) > + > +LABEL(gobble_ashr_12): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $12, %xmm3 > + pslldq $4, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_12) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $12, %xmm3 > + pslldq $4, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_12) > + > + .p2align 4 > +LABEL(nibble_ashr_12): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xf000, %edx > + jnz LABEL(ashr_12_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $4, %r11 > + jbe LABEL(ashr_12_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_12) > + > + .p2align 4 > +LABEL(ashr_12_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $12, %xmm0 > + psrldq $12, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_13 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13 > + */ > + .p2align 4 > +LABEL(ashr_13): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $3, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $13, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 13(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_13): > + add $16, %r10 > + jg LABEL(nibble_ashr_13) > + > +LABEL(gobble_ashr_13): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $13, %xmm3 > + pslldq $3, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_13) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $13, %xmm3 > + pslldq $3, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_13) > + > + .p2align 4 > +LABEL(nibble_ashr_13): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xe000, %edx > + jnz LABEL(ashr_13_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $3, %r11 > + jbe LABEL(ashr_13_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_13) > + > + .p2align 4 > +LABEL(ashr_13_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $13, %xmm0 > + psrldq $13, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_14 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14 > + */ > + .p2align 4 > +LABEL(ashr_14): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $2, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $14, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 14(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_14): > + add $16, %r10 > + jg LABEL(nibble_ashr_14) > + > +LABEL(gobble_ashr_14): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $14, %xmm3 > + pslldq $2, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_14) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $14, %xmm3 > + pslldq $2, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_14) > + > + .p2align 4 > +LABEL(nibble_ashr_14): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0xc000, %edx > + jnz LABEL(ashr_14_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmp $2, %r11 > + jbe LABEL(ashr_14_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_14) > + > + .p2align 4 > +LABEL(ashr_14_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $14, %xmm0 > + psrldq $14, %xmm3 > + jmp LABEL(aftertail) > + > +/* > + * The following cases will be handled by ashr_15 > + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > + * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15 > + */ > + .p2align 4 > +LABEL(ashr_15): > + pxor %xmm0, %xmm0 > + movdqa (%rdi), %xmm2 > + movdqa (%rsi), %xmm1 > + pcmpeqb %xmm1, %xmm0 > + pslldq $1, %xmm2 > + TOLOWER (%xmm1, %xmm2) > + pcmpeqb %xmm1, %xmm2 > + psubb %xmm0, %xmm2 > + pmovmskb %xmm2, %r9d > + shr %cl, %edx > + shr %cl, %r9d > + sub %r9d, %edx > + jnz LABEL(less32bytes) > + > + movdqa (%rdi), %xmm3 > + > + UPDATE_STRNCMP_COUNTER > + > + pxor %xmm0, %xmm0 > + mov $16, %rcx /* index for loads */ > + mov $15, %r9d /* byte position left over from less32bytes case */ > + /* > + * Setup %r10 value allows us to detect crossing a page boundary. > + * When %r10 goes positive we have crossed a page boundary and > + * need to do a nibble. > + */ > + lea 15(%rdi), %r10 > + and $0xfff, %r10 /* offset into 4K page */ > + > + sub $0x1000, %r10 /* subtract 4K pagesize */ > + > + .p2align 4 > +LABEL(loop_ashr_15): > + add $16, %r10 > + jg LABEL(nibble_ashr_15) > + > +LABEL(gobble_ashr_15): > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $15, %xmm3 > + pslldq $1, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + > + add $16, %r10 > + jg LABEL(nibble_ashr_15) /* cross page boundary */ > + > + movdqa (%rsi, %rcx), %xmm1 > + movdqa (%rdi, %rcx), %xmm2 > + movdqa %xmm2, %xmm4 > + > + psrldq $15, %xmm3 > + pslldq $1, %xmm2 > + por %xmm3, %xmm2 /* merge into one 16byte value */ > + > + TOLOWER (%xmm1, %xmm2) > + > + pcmpeqb %xmm1, %xmm0 > + pcmpeqb %xmm2, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + sub $0xffff, %edx > + jnz LABEL(exit) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub $16, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + > + add $16, %rcx > + movdqa %xmm4, %xmm3 > + jmp LABEL(loop_ashr_15) > + > + .p2align 4 > +LABEL(nibble_ashr_15): > + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > + pmovmskb %xmm0, %edx > + test $0x8000, %edx > + jnz LABEL(ashr_15_exittail) > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + cmpq $1, %r11 > + jbe LABEL(ashr_15_exittail) > +# endif > + > + pxor %xmm0, %xmm0 > + sub $0x1000, %r10 > + jmp LABEL(gobble_ashr_15) > + > + .p2align 4 > +LABEL(ashr_15_exittail): > + movdqa (%rsi, %rcx), %xmm1 > + psrldq $15, %xmm3 > + psrldq $15, %xmm0 > + > + .p2align 4 > +LABEL(aftertail): > + TOLOWER (%xmm1, %xmm3) > + pcmpeqb %xmm3, %xmm1 > + psubb %xmm0, %xmm1 > + pmovmskb %xmm1, %edx > + not %edx > + > + .p2align 4 > +LABEL(exit): > + lea -16(%r9, %rcx), %rax /* locate the exact offset for rdi */ > +LABEL(less32bytes): > + lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */ > + lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */ > + test %r8d, %r8d > + jz LABEL(ret) > + xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ > + > + .p2align 4 > +LABEL(ret): > +LABEL(less16bytes): > + bsf %rdx, %rdx /* find and store bit index in %rdx */ > + > +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > + sub %rdx, %r11 > + jbe LABEL(strcmp_exitz) > +# endif > + movzbl (%rsi, %rdx), %ecx > + movzbl (%rdi, %rdx), %eax > + > +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx > + movl (%rdx,%rcx,4), %ecx > + movl (%rdx,%rax,4), %eax > +# endif > + > + sub %ecx, %eax > + ret > + > +LABEL(strcmp_exitz): > + xor %eax, %eax > + ret > + > + .p2align 4 > +LABEL(Byte0): > + movzbl (%rsi), %ecx > + movzbl (%rdi), %eax > + > +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx > + movl (%rdx,%rcx,4), %ecx > + movl (%rdx,%rax,4), %eax > +# endif > + > + sub %ecx, %eax > + ret > +END (STRCMP) > + > + .section .rodata,"a",@progbits > + .p2align 3 > +LABEL(unaligned_table): > + .int LABEL(ashr_1) - LABEL(unaligned_table) > + .int LABEL(ashr_2) - LABEL(unaligned_table) > + .int LABEL(ashr_3) - LABEL(unaligned_table) > + .int LABEL(ashr_4) - LABEL(unaligned_table) > + .int LABEL(ashr_5) - LABEL(unaligned_table) > + .int LABEL(ashr_6) - LABEL(unaligned_table) > + .int LABEL(ashr_7) - LABEL(unaligned_table) > + .int LABEL(ashr_8) - LABEL(unaligned_table) > + .int LABEL(ashr_9) - LABEL(unaligned_table) > + .int LABEL(ashr_10) - LABEL(unaligned_table) > + .int LABEL(ashr_11) - LABEL(unaligned_table) > + .int LABEL(ashr_12) - LABEL(unaligned_table) > + .int LABEL(ashr_13) - LABEL(unaligned_table) > + .int LABEL(ashr_14) - LABEL(unaligned_table) > + .int LABEL(ashr_15) - LABEL(unaligned_table) > + .int LABEL(ashr_0) - LABEL(unaligned_table) > +#endif > diff --git a/sysdeps/x86_64/multiarch/strncase_l-sse2.S b/sysdeps/x86_64/multiarch/strncase_l-sse2.S > index 0ca4c836b2..fd8ad07450 100644 > --- a/sysdeps/x86_64/multiarch/strncase_l-sse2.S > +++ b/sysdeps/x86_64/multiarch/strncase_l-sse2.S > @@ -16,8 +16,5 @@ > License along with the GNU C Library; if not, see > <https://www.gnu.org/licenses/>. */ > > -#define STRCMP __strncasecmp_l_sse2 > -#define NO_NOLOCALE_ALIAS > #define USE_AS_STRNCASECMP_L > -#define __strncasecmp __strncasecmp_sse2 > -#include <sysdeps/x86_64/strcmp.S> > +#include "strcmp-sse2.S" > diff --git a/sysdeps/x86_64/multiarch/strncmp-sse2.S b/sysdeps/x86_64/multiarch/strncmp-sse2.S > index e3ba94f926..2152b8dc3d 100644 > --- a/sysdeps/x86_64/multiarch/strncmp-sse2.S > +++ b/sysdeps/x86_64/multiarch/strncmp-sse2.S > @@ -16,15 +16,5 @@ > License along with the GNU C Library; if not, see > <https://www.gnu.org/licenses/>. */ > > -#include <sysdep.h> > - > -#if IS_IN (libc) > -# define STRCMP __strncmp_sse2 > -# undef libc_hidden_builtin_def > -# define libc_hidden_builtin_def(strcmp) > -#else > -# define STRCMP strncmp > -#endif > - > #define USE_AS_STRNCMP > -#include <sysdeps/x86_64/strcmp.S> > +#include "strcmp-sse2.S" > diff --git a/sysdeps/x86_64/strcasecmp_l.S b/sysdeps/x86_64/strcasecmp_l.S > index 5456b3a49e..84fd7fdfd3 100644 > --- a/sysdeps/x86_64/strcasecmp_l.S > +++ b/sysdeps/x86_64/strcasecmp_l.S > @@ -1,6 +1,11 @@ > -#define STRCMP __strcasecmp_l > -#define USE_AS_STRCASECMP_L > -#include "strcmp.S" > +/* Symbols = __strcasecmp_l and __strcasecmp. */ > + > +#include "multiarch/strcasecmp_l-sse2.S" > + > +libc_hidden_builtin_def (__strcasecmp_l) > > weak_alias (__strcasecmp_l, strcasecmp_l) > libc_hidden_def (strcasecmp_l) > + > +weak_alias (__strcasecmp, strcasecmp) > +libc_hidden_def (__strcasecmp) > diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S > index c38dc627f9..19e54bd3a7 100644 > --- a/sysdeps/x86_64/strcmp.S > +++ b/sysdeps/x86_64/strcmp.S > @@ -16,2148 +16,7 @@ > License along with the GNU C Library; if not, see > <https://www.gnu.org/licenses/>. */ > > -#include <sysdep.h> > -#include "asm-syntax.h" > +/* Symbol = strcmp. */ > > -#undef UPDATE_STRNCMP_COUNTER > - > -#ifndef LABEL > -#define LABEL(l) L(l) > -#endif > - > -#ifdef USE_AS_STRNCMP > -/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz > - if the new counter > the old one or is 0. */ > -# define UPDATE_STRNCMP_COUNTER \ > - /* calculate left number to compare */ \ > - lea -16(%rcx, %r11), %r9; \ > - cmp %r9, %r11; \ > - jb LABEL(strcmp_exitz); \ > - test %r9, %r9; \ > - je LABEL(strcmp_exitz); \ > - mov %r9, %r11 > - > -#elif defined USE_AS_STRCASECMP_L > -# include "locale-defines.h" > - > -# define UPDATE_STRNCMP_COUNTER > -#elif defined USE_AS_STRNCASECMP_L > -# include "locale-defines.h" > - > -# define UPDATE_STRNCMP_COUNTER \ > - /* calculate left number to compare */ \ > - lea -16(%rcx, %r11), %r9; \ > - cmp %r9, %r11; \ > - jb LABEL(strcmp_exitz); \ > - test %r9, %r9; \ > - je LABEL(strcmp_exitz); \ > - mov %r9, %r11 > -#else > -# define UPDATE_STRNCMP_COUNTER > -# ifndef STRCMP > -# define STRCMP strcmp > -# endif > -#endif > - > - .text > -#ifdef USE_AS_STRCASECMP_L > -# ifndef ENTRY2 > -# define ENTRY2(name) ENTRY (name) > -# define END2(name) END (name) > -# endif > - > -ENTRY2 (__strcasecmp) > - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax > - mov %fs:(%rax),%RDX_LP > - > - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ > - .p2align 4 > -END2 (__strcasecmp) > -# ifndef NO_NOLOCALE_ALIAS > -weak_alias (__strcasecmp, strcasecmp) > -libc_hidden_def (__strcasecmp) > -# endif > - /* FALLTHROUGH to strcasecmp_l. */ > -#elif defined USE_AS_STRNCASECMP_L > -# ifndef ENTRY2 > -# define ENTRY2(name) ENTRY (name) > -# define END2(name) END (name) > -# endif > - > -ENTRY2 (__strncasecmp) > - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax > - mov %fs:(%rax),%RCX_LP > - > - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ > - .p2align 4 > -END2 (__strncasecmp) > -# ifndef NO_NOLOCALE_ALIAS > -weak_alias (__strncasecmp, strncasecmp) > -libc_hidden_def (__strncasecmp) > -# endif > - /* FALLTHROUGH to strncasecmp_l. */ > -#endif > - > -ENTRY (STRCMP) > -#ifdef USE_AS_STRCASECMP_L > - /* We have to fall back on the C implementation for locales > - with encodings not matching ASCII for single bytes. */ > -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 > - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP > -# else > - mov (%rdx), %RAX_LP > -# endif > - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) > - jne __strcasecmp_l_nonascii > -#elif defined USE_AS_STRNCASECMP_L > - /* We have to fall back on the C implementation for locales > - with encodings not matching ASCII for single bytes. */ > -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 > - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP > -# else > - mov (%rcx), %RAX_LP > -# endif > - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) > - jne __strncasecmp_l_nonascii > -#endif > - > -/* > - * This implementation uses SSE to compare up to 16 bytes at a time. > - */ > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - test %RDX_LP, %RDX_LP > - je LABEL(strcmp_exitz) > - cmp $1, %RDX_LP > - je LABEL(Byte0) > - mov %RDX_LP, %R11_LP > -#endif > - mov %esi, %ecx > - mov %edi, %eax > -/* Use 64bit AND here to avoid long NOP padding. */ > - and $0x3f, %rcx /* rsi alignment in cache line */ > - and $0x3f, %rax /* rdi alignment in cache line */ > -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > - .section .rodata.cst16,"aM",@progbits,16 > - .align 16 > -.Llcase_min: > - .quad 0x3f3f3f3f3f3f3f3f > - .quad 0x3f3f3f3f3f3f3f3f > -.Llcase_max: > - .quad 0x9999999999999999 > - .quad 0x9999999999999999 > -.Lcase_add: > - .quad 0x2020202020202020 > - .quad 0x2020202020202020 > - .previous > - movdqa .Llcase_min(%rip), %xmm5 > -# define LCASE_MIN_reg %xmm5 > - movdqa .Llcase_max(%rip), %xmm6 > -# define LCASE_MAX_reg %xmm6 > - movdqa .Lcase_add(%rip), %xmm7 > -# define CASE_ADD_reg %xmm7 > -#endif > - cmp $0x30, %ecx > - ja LABEL(crosscache) /* rsi: 16-byte load will cross cache line */ > - cmp $0x30, %eax > - ja LABEL(crosscache) /* rdi: 16-byte load will cross cache line */ > - movlpd (%rdi), %xmm1 > - movlpd (%rsi), %xmm2 > - movhpd 8(%rdi), %xmm1 > - movhpd 8(%rsi), %xmm2 > -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > -# define TOLOWER(reg1, reg2) \ > - movdqa LCASE_MIN_reg, %xmm8; \ > - movdqa LCASE_MIN_reg, %xmm9; \ > - paddb reg1, %xmm8; \ > - paddb reg2, %xmm9; \ > - pcmpgtb LCASE_MAX_reg, %xmm8; \ > - pcmpgtb LCASE_MAX_reg, %xmm9; \ > - pandn CASE_ADD_reg, %xmm8; \ > - pandn CASE_ADD_reg, %xmm9; \ > - paddb %xmm8, reg1; \ > - paddb %xmm9, reg2 > - TOLOWER (%xmm1, %xmm2) > -#else > -# define TOLOWER(reg1, reg2) > -#endif > - pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */ > - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > - pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */ > - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */ > - jnz LABEL(less16bytes) /* If not, find different value or null char */ > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) /* finish comparision */ > -#endif > - add $16, %rsi /* prepare to search next 16 bytes */ > - add $16, %rdi /* prepare to search next 16 bytes */ > - > - /* > - * Determine source and destination string offsets from 16-byte alignment. > - * Use relative offset difference between the two to determine which case > - * below to use. > - */ > - .p2align 4 > -LABEL(crosscache): > - and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */ > - and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */ > - mov $0xffff, %edx /* for equivalent offset */ > - xor %r8d, %r8d > - and $0xf, %ecx /* offset of rsi */ > - and $0xf, %eax /* offset of rdi */ > - cmp %eax, %ecx > - je LABEL(ashr_0) /* rsi and rdi relative offset same */ > - ja LABEL(bigger) > - mov %edx, %r8d /* r8d is offset flag for exit tail */ > - xchg %ecx, %eax > - xchg %rsi, %rdi > -LABEL(bigger): > - lea 15(%rax), %r9 > - sub %rcx, %r9 > - lea LABEL(unaligned_table)(%rip), %r10 > - movslq (%r10, %r9,4), %r9 > - lea (%r10, %r9), %r10 > - _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ > - > -/* > - * The following cases will be handled by ashr_0 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(0~15) n(0~15) 15(15+ n-n) ashr_0 > - */ > - .p2align 4 > -LABEL(ashr_0): > - > - movdqa (%rsi), %xmm1 > - pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ > - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L > - pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */ > -#else > - movdqa (%rdi), %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */ > -#endif > - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ > - pmovmskb %xmm1, %r9d > - shr %cl, %edx /* adjust 0xffff for offset */ > - shr %cl, %r9d /* adjust for 16-byte offset */ > - sub %r9d, %edx > - /* > - * edx must be the same with r9d if in left byte (16-rcx) is equal to > - * the start from (16-rax) and no null char was seen. > - */ > - jne LABEL(less32bytes) /* mismatch or null char */ > - UPDATE_STRNCMP_COUNTER > - mov $16, %rcx > - mov $16, %r9 > - pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ > - > - /* > - * Now both strings are aligned at 16-byte boundary. Loop over strings > - * checking 32-bytes per iteration. > - */ > - .p2align 4 > -LABEL(loop_ashr_0): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) /* mismatch or null char seen */ > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - add $16, %rcx > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - add $16, %rcx > - jmp LABEL(loop_ashr_0) > - > -/* > - * The following cases will be handled by ashr_1 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(15) n -15 0(15 +(n-15) - n) ashr_1 > - */ > - .p2align 4 > -LABEL(ashr_1): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ > - pslldq $15, %xmm2 /* shift first string to align with second */ > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */ > - psubb %xmm0, %xmm2 /* packed sub of comparison results*/ > - pmovmskb %xmm2, %r9d > - shr %cl, %edx /* adjust 0xffff for offset */ > - shr %cl, %r9d /* adjust for 16-byte offset */ > - sub %r9d, %edx > - jnz LABEL(less32bytes) /* mismatch or null char seen */ > - movdqa (%rdi), %xmm3 > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads*/ > - mov $1, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 1(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_1): > - add $16, %r10 > - jg LABEL(nibble_ashr_1) /* cross page boundary */ > - > -LABEL(gobble_ashr_1): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 /* store for next cycle */ > - > - psrldq $1, %xmm3 > - pslldq $15, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_1) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 /* store for next cycle */ > - > - psrldq $1, %xmm3 > - pslldq $15, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_1) > - > - /* > - * Nibble avoids loads across page boundary. This is to avoid a potential > - * access into unmapped memory. > - */ > - .p2align 4 > -LABEL(nibble_ashr_1): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char*/ > - pmovmskb %xmm0, %edx > - test $0xfffe, %edx > - jnz LABEL(ashr_1_exittail) /* find null char*/ > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $15, %r11 > - jbe LABEL(ashr_1_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 /* substract 4K from %r10 */ > - jmp LABEL(gobble_ashr_1) > - > - /* > - * Once find null char, determine if there is a string mismatch > - * before the null char. > - */ > - .p2align 4 > -LABEL(ashr_1_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $1, %xmm0 > - psrldq $1, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_2 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(14~15) n -14 1(15 +(n-14) - n) ashr_2 > - */ > - .p2align 4 > -LABEL(ashr_2): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $14, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $2, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 2(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_2): > - add $16, %r10 > - jg LABEL(nibble_ashr_2) > - > -LABEL(gobble_ashr_2): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $2, %xmm3 > - pslldq $14, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_2) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $2, %xmm3 > - pslldq $14, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_2) > - > - .p2align 4 > -LABEL(nibble_ashr_2): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xfffc, %edx > - jnz LABEL(ashr_2_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $14, %r11 > - jbe LABEL(ashr_2_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_2) > - > - .p2align 4 > -LABEL(ashr_2_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $2, %xmm0 > - psrldq $2, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_3 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(13~15) n -13 2(15 +(n-13) - n) ashr_3 > - */ > - .p2align 4 > -LABEL(ashr_3): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $13, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $3, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 3(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_3): > - add $16, %r10 > - jg LABEL(nibble_ashr_3) > - > -LABEL(gobble_ashr_3): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $3, %xmm3 > - pslldq $13, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_3) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $3, %xmm3 > - pslldq $13, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_3) > - > - .p2align 4 > -LABEL(nibble_ashr_3): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xfff8, %edx > - jnz LABEL(ashr_3_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $13, %r11 > - jbe LABEL(ashr_3_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_3) > - > - .p2align 4 > -LABEL(ashr_3_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $3, %xmm0 > - psrldq $3, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_4 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(12~15) n -12 3(15 +(n-12) - n) ashr_4 > - */ > - .p2align 4 > -LABEL(ashr_4): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $12, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $4, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 4(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_4): > - add $16, %r10 > - jg LABEL(nibble_ashr_4) > - > -LABEL(gobble_ashr_4): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $4, %xmm3 > - pslldq $12, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_4) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $4, %xmm3 > - pslldq $12, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_4) > - > - .p2align 4 > -LABEL(nibble_ashr_4): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xfff0, %edx > - jnz LABEL(ashr_4_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $12, %r11 > - jbe LABEL(ashr_4_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_4) > - > - .p2align 4 > -LABEL(ashr_4_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $4, %xmm0 > - psrldq $4, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_5 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5 > - */ > - .p2align 4 > -LABEL(ashr_5): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $11, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $5, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 5(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_5): > - add $16, %r10 > - jg LABEL(nibble_ashr_5) > - > -LABEL(gobble_ashr_5): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $5, %xmm3 > - pslldq $11, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_5) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $5, %xmm3 > - pslldq $11, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_5) > - > - .p2align 4 > -LABEL(nibble_ashr_5): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xffe0, %edx > - jnz LABEL(ashr_5_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $11, %r11 > - jbe LABEL(ashr_5_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_5) > - > - .p2align 4 > -LABEL(ashr_5_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $5, %xmm0 > - psrldq $5, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_6 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6 > - */ > - .p2align 4 > -LABEL(ashr_6): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $10, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $6, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 6(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_6): > - add $16, %r10 > - jg LABEL(nibble_ashr_6) > - > -LABEL(gobble_ashr_6): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $6, %xmm3 > - pslldq $10, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_6) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $6, %xmm3 > - pslldq $10, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_6) > - > - .p2align 4 > -LABEL(nibble_ashr_6): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xffc0, %edx > - jnz LABEL(ashr_6_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $10, %r11 > - jbe LABEL(ashr_6_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_6) > - > - .p2align 4 > -LABEL(ashr_6_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $6, %xmm0 > - psrldq $6, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_7 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7 > - */ > - .p2align 4 > -LABEL(ashr_7): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $9, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $7, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 7(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_7): > - add $16, %r10 > - jg LABEL(nibble_ashr_7) > - > -LABEL(gobble_ashr_7): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $7, %xmm3 > - pslldq $9, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_7) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $7, %xmm3 > - pslldq $9, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_7) > - > - .p2align 4 > -LABEL(nibble_ashr_7): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xff80, %edx > - jnz LABEL(ashr_7_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $9, %r11 > - jbe LABEL(ashr_7_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_7) > - > - .p2align 4 > -LABEL(ashr_7_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $7, %xmm0 > - psrldq $7, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_8 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8 > - */ > - .p2align 4 > -LABEL(ashr_8): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $8, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $8, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 8(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_8): > - add $16, %r10 > - jg LABEL(nibble_ashr_8) > - > -LABEL(gobble_ashr_8): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $8, %xmm3 > - pslldq $8, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_8) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $8, %xmm3 > - pslldq $8, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_8) > - > - .p2align 4 > -LABEL(nibble_ashr_8): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xff00, %edx > - jnz LABEL(ashr_8_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $8, %r11 > - jbe LABEL(ashr_8_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_8) > - > - .p2align 4 > -LABEL(ashr_8_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $8, %xmm0 > - psrldq $8, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_9 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9 > - */ > - .p2align 4 > -LABEL(ashr_9): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $7, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $9, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 9(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_9): > - add $16, %r10 > - jg LABEL(nibble_ashr_9) > - > -LABEL(gobble_ashr_9): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $9, %xmm3 > - pslldq $7, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_9) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $9, %xmm3 > - pslldq $7, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 /* store for next cycle */ > - jmp LABEL(loop_ashr_9) > - > - .p2align 4 > -LABEL(nibble_ashr_9): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xfe00, %edx > - jnz LABEL(ashr_9_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $7, %r11 > - jbe LABEL(ashr_9_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_9) > - > - .p2align 4 > -LABEL(ashr_9_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $9, %xmm0 > - psrldq $9, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_10 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10 > - */ > - .p2align 4 > -LABEL(ashr_10): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $6, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $10, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 10(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_10): > - add $16, %r10 > - jg LABEL(nibble_ashr_10) > - > -LABEL(gobble_ashr_10): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $10, %xmm3 > - pslldq $6, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_10) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $10, %xmm3 > - pslldq $6, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_10) > - > - .p2align 4 > -LABEL(nibble_ashr_10): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xfc00, %edx > - jnz LABEL(ashr_10_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $6, %r11 > - jbe LABEL(ashr_10_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_10) > - > - .p2align 4 > -LABEL(ashr_10_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $10, %xmm0 > - psrldq $10, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_11 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11 > - */ > - .p2align 4 > -LABEL(ashr_11): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $5, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $11, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 11(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_11): > - add $16, %r10 > - jg LABEL(nibble_ashr_11) > - > -LABEL(gobble_ashr_11): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $11, %xmm3 > - pslldq $5, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_11) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $11, %xmm3 > - pslldq $5, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_11) > - > - .p2align 4 > -LABEL(nibble_ashr_11): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xf800, %edx > - jnz LABEL(ashr_11_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $5, %r11 > - jbe LABEL(ashr_11_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_11) > - > - .p2align 4 > -LABEL(ashr_11_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $11, %xmm0 > - psrldq $11, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_12 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12 > - */ > - .p2align 4 > -LABEL(ashr_12): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $4, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $12, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 12(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_12): > - add $16, %r10 > - jg LABEL(nibble_ashr_12) > - > -LABEL(gobble_ashr_12): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $12, %xmm3 > - pslldq $4, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_12) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $12, %xmm3 > - pslldq $4, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_12) > - > - .p2align 4 > -LABEL(nibble_ashr_12): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xf000, %edx > - jnz LABEL(ashr_12_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $4, %r11 > - jbe LABEL(ashr_12_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_12) > - > - .p2align 4 > -LABEL(ashr_12_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $12, %xmm0 > - psrldq $12, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_13 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13 > - */ > - .p2align 4 > -LABEL(ashr_13): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $3, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $13, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 13(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_13): > - add $16, %r10 > - jg LABEL(nibble_ashr_13) > - > -LABEL(gobble_ashr_13): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $13, %xmm3 > - pslldq $3, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_13) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $13, %xmm3 > - pslldq $3, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_13) > - > - .p2align 4 > -LABEL(nibble_ashr_13): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xe000, %edx > - jnz LABEL(ashr_13_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $3, %r11 > - jbe LABEL(ashr_13_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_13) > - > - .p2align 4 > -LABEL(ashr_13_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $13, %xmm0 > - psrldq $13, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_14 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14 > - */ > - .p2align 4 > -LABEL(ashr_14): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $2, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $14, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 14(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_14): > - add $16, %r10 > - jg LABEL(nibble_ashr_14) > - > -LABEL(gobble_ashr_14): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $14, %xmm3 > - pslldq $2, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_14) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $14, %xmm3 > - pslldq $2, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_14) > - > - .p2align 4 > -LABEL(nibble_ashr_14): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0xc000, %edx > - jnz LABEL(ashr_14_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmp $2, %r11 > - jbe LABEL(ashr_14_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_14) > - > - .p2align 4 > -LABEL(ashr_14_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $14, %xmm0 > - psrldq $14, %xmm3 > - jmp LABEL(aftertail) > - > -/* > - * The following cases will be handled by ashr_15 > - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case > - * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15 > - */ > - .p2align 4 > -LABEL(ashr_15): > - pxor %xmm0, %xmm0 > - movdqa (%rdi), %xmm2 > - movdqa (%rsi), %xmm1 > - pcmpeqb %xmm1, %xmm0 > - pslldq $1, %xmm2 > - TOLOWER (%xmm1, %xmm2) > - pcmpeqb %xmm1, %xmm2 > - psubb %xmm0, %xmm2 > - pmovmskb %xmm2, %r9d > - shr %cl, %edx > - shr %cl, %r9d > - sub %r9d, %edx > - jnz LABEL(less32bytes) > - > - movdqa (%rdi), %xmm3 > - > - UPDATE_STRNCMP_COUNTER > - > - pxor %xmm0, %xmm0 > - mov $16, %rcx /* index for loads */ > - mov $15, %r9d /* byte position left over from less32bytes case */ > - /* > - * Setup %r10 value allows us to detect crossing a page boundary. > - * When %r10 goes positive we have crossed a page boundary and > - * need to do a nibble. > - */ > - lea 15(%rdi), %r10 > - and $0xfff, %r10 /* offset into 4K page */ > - > - sub $0x1000, %r10 /* subtract 4K pagesize */ > - > - .p2align 4 > -LABEL(loop_ashr_15): > - add $16, %r10 > - jg LABEL(nibble_ashr_15) > - > -LABEL(gobble_ashr_15): > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $15, %xmm3 > - pslldq $1, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - > - add $16, %r10 > - jg LABEL(nibble_ashr_15) /* cross page boundary */ > - > - movdqa (%rsi, %rcx), %xmm1 > - movdqa (%rdi, %rcx), %xmm2 > - movdqa %xmm2, %xmm4 > - > - psrldq $15, %xmm3 > - pslldq $1, %xmm2 > - por %xmm3, %xmm2 /* merge into one 16byte value */ > - > - TOLOWER (%xmm1, %xmm2) > - > - pcmpeqb %xmm1, %xmm0 > - pcmpeqb %xmm2, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - sub $0xffff, %edx > - jnz LABEL(exit) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub $16, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - > - add $16, %rcx > - movdqa %xmm4, %xmm3 > - jmp LABEL(loop_ashr_15) > - > - .p2align 4 > -LABEL(nibble_ashr_15): > - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ > - pmovmskb %xmm0, %edx > - test $0x8000, %edx > - jnz LABEL(ashr_15_exittail) > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - cmpq $1, %r11 > - jbe LABEL(ashr_15_exittail) > -#endif > - > - pxor %xmm0, %xmm0 > - sub $0x1000, %r10 > - jmp LABEL(gobble_ashr_15) > - > - .p2align 4 > -LABEL(ashr_15_exittail): > - movdqa (%rsi, %rcx), %xmm1 > - psrldq $15, %xmm3 > - psrldq $15, %xmm0 > - > - .p2align 4 > -LABEL(aftertail): > - TOLOWER (%xmm1, %xmm3) > - pcmpeqb %xmm3, %xmm1 > - psubb %xmm0, %xmm1 > - pmovmskb %xmm1, %edx > - not %edx > - > - .p2align 4 > -LABEL(exit): > - lea -16(%r9, %rcx), %rax /* locate the exact offset for rdi */ > -LABEL(less32bytes): > - lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */ > - lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */ > - test %r8d, %r8d > - jz LABEL(ret) > - xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ > - > - .p2align 4 > -LABEL(ret): > -LABEL(less16bytes): > - bsf %rdx, %rdx /* find and store bit index in %rdx */ > - > -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L > - sub %rdx, %r11 > - jbe LABEL(strcmp_exitz) > -#endif > - movzbl (%rsi, %rdx), %ecx > - movzbl (%rdi, %rdx), %eax > - > -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx > - movl (%rdx,%rcx,4), %ecx > - movl (%rdx,%rax,4), %eax > -#endif > - > - sub %ecx, %eax > - ret > - > -LABEL(strcmp_exitz): > - xor %eax, %eax > - ret > - > - .p2align 4 > -LABEL(Byte0): > - movzbl (%rsi), %ecx > - movzbl (%rdi), %eax > - > -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L > - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx > - movl (%rdx,%rcx,4), %ecx > - movl (%rdx,%rax,4), %eax > -#endif > - > - sub %ecx, %eax > - ret > -END (STRCMP) > - > - .section .rodata,"a",@progbits > - .p2align 3 > -LABEL(unaligned_table): > - .int LABEL(ashr_1) - LABEL(unaligned_table) > - .int LABEL(ashr_2) - LABEL(unaligned_table) > - .int LABEL(ashr_3) - LABEL(unaligned_table) > - .int LABEL(ashr_4) - LABEL(unaligned_table) > - .int LABEL(ashr_5) - LABEL(unaligned_table) > - .int LABEL(ashr_6) - LABEL(unaligned_table) > - .int LABEL(ashr_7) - LABEL(unaligned_table) > - .int LABEL(ashr_8) - LABEL(unaligned_table) > - .int LABEL(ashr_9) - LABEL(unaligned_table) > - .int LABEL(ashr_10) - LABEL(unaligned_table) > - .int LABEL(ashr_11) - LABEL(unaligned_table) > - .int LABEL(ashr_12) - LABEL(unaligned_table) > - .int LABEL(ashr_13) - LABEL(unaligned_table) > - .int LABEL(ashr_14) - LABEL(unaligned_table) > - .int LABEL(ashr_15) - LABEL(unaligned_table) > - .int LABEL(ashr_0) - LABEL(unaligned_table) > -libc_hidden_builtin_def (STRCMP) > +#include "multiarch/strcmp-sse2.S" > +libc_hidden_builtin_def (strcmp) > diff --git a/sysdeps/x86_64/strncase_l.S b/sysdeps/x86_64/strncase_l.S > index c725cd85b3..3780fc50b1 100644 > --- a/sysdeps/x86_64/strncase_l.S > +++ b/sysdeps/x86_64/strncase_l.S > @@ -1,6 +1,11 @@ > -#define STRCMP __strncasecmp_l > -#define USE_AS_STRNCASECMP_L > -#include "strcmp.S" > +/* Symbols = __strncasecmp_l and __strncasecmp. */ > + > +#include "multiarch/strncase_l-sse2.S" > + > +libc_hidden_builtin_def (__strncasecmp_l) > > weak_alias (__strncasecmp_l, strncasecmp_l) > libc_hidden_def (strncasecmp_l) > + > +weak_alias (__strncasecmp, strncasecmp) > +libc_hidden_def (__strncasecmp) > diff --git a/sysdeps/x86_64/strncmp.S b/sysdeps/x86_64/strncmp.S > index 0af34e7f15..13d9e82ee2 100644 > --- a/sysdeps/x86_64/strncmp.S > +++ b/sysdeps/x86_64/strncmp.S > @@ -1,3 +1,4 @@ > -#define STRCMP strncmp > -#define USE_AS_STRNCMP > -#include "strcmp.S" > +/* Symbol = strncmp. */ > + > +#include "multiarch/strncmp-sse2.S" > +libc_hidden_builtin_def (strncmp) > -- > 2.34.1 > LGTM. Thanks.

diff --git a/sysdeps/x86_64/multiarch/rtld-strcmp.S b/sysdeps/x86_64/multiarch/rtld-strcmp.S new file mode 100644 index 0000000000..207078bdcc --- /dev/null +++ b/sysdeps/x86_64/multiarch/rtld-strcmp.S @@ -0,0 +1,18 @@ +/* Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include "../strcmp.S" diff --git a/sysdeps/x86_64/multiarch/rtld-strncmp.S b/sysdeps/x86_64/multiarch/rtld-strncmp.S new file mode 100644 index 0000000000..ac32150406 --- /dev/null +++ b/sysdeps/x86_64/multiarch/rtld-strncmp.S @@ -0,0 +1,18 @@ +/* Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include "../strncmp.S" diff --git a/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S b/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S index 2360d104dd..a2b5741399 100644 --- a/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S +++ b/sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S @@ -16,8 +16,5 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#define STRCMP __strcasecmp_l_sse2 #define USE_AS_STRCASECMP_L -#define NO_NOLOCALE_ALIAS -#define __strcasecmp __strcasecmp_sse2 -#include <sysdeps/x86_64/strcmp.S> +#include "strcmp-sse2.S" diff --git a/sysdeps/x86_64/multiarch/strcmp-naming.h b/sysdeps/x86_64/multiarch/strcmp-naming.h new file mode 100644 index 0000000000..6a7529b6a4 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcmp-naming.h @@ -0,0 +1,68 @@ +#ifndef _STRCMP_NAMING_H_ +#define _STRCMP_NAMING_H_ + +/* Utility macros. */ +#define STRCMP_SUFFIX(x, y) x##y +#define STRCMP_NAME(x, y) STRCMP_SUFFIX (x, y) + +/* Setup base of all definitions. */ +#define STRNCASECMP_BASE __strncasecmp +#define STRCASECMP_BASE __strcasecmp +#define WCSCMP_BASE __wcscmp + +#if defined USE_MULTIARCH && IS_IN (libc) +# define WCSNCMP_BASE __wcsncmp +# define STRNCMP_BASE __strncmp +# define STRCMP_BASE __strcmp + +#else +/* Covers IS_IN (rtld) or non-multiarch build. */ +# define WCSNCMP_BASE wcsncmp +# define STRNCMP_BASE strncmp +# define STRCMP_BASE strcmp + +# undef STRCMP_ISA +# define STRCMP_ISA +#endif + +#if IS_IN (rtld) || defined USE_MULTIARCH +# define ISA_HIDDEN_JUMPTARGET(...) __VA_ARGS__ +#else +# define ISA_HIDDEN_JUMPTARGET(...) HIDDEN_JUMPTARGET (__VA_ARGS__) +#endif + +/* Get correct symbol for OVERFLOW_STRCMP, STRCMP, and + STRCASECMP. */ +#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + +# if defined USE_AS_WCSCMP || defined USE_AS_WCSNCMP +# define OVERFLOW_STRCMP_SYM WCSCMP_BASE +# define STRCMP_SYM WCSNCMP_BASE +# elif defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L +# define OVERFLOW_STRCMP_SYM STRCMP_NAME (STRCASECMP_BASE, _l) +# define STRCMP_SYM STRCMP_NAME (STRNCASECMP_BASE, _l) +# else +# define OVERFLOW_STRCMP_SYM STRCMP_BASE +# define STRCMP_SYM STRNCMP_BASE +# endif + +# define STRCASECMP_SYM STRNCASECMP_BASE +# define OVERFLOW_STRCMP \ + ISA_HIDDEN_JUMPTARGET (STRCMP_NAME (OVERFLOW_STRCMP_SYM, STRCMP_ISA)) +#else +# ifdef USE_AS_WCSCMP +# define STRCMP_SYM WCSCMP_BASE +# elif defined USE_AS_STRCASECMP_L +# define STRCMP_SYM STRCMP_NAME (STRCASECMP_BASE, _l) +# else +# define STRCMP_SYM STRCMP_BASE +# endif + +# define STRCASECMP_SYM STRCASECMP_BASE +#endif + +#define STRCASECMP_L_NONASCII STRCMP_NAME (STRCASECMP_SYM, _l_nonascii) +#define STRCASECMP STRCMP_NAME (STRCASECMP_SYM, STRCMP_ISA) +#define STRCMP STRCMP_NAME (STRCMP_SYM, STRCMP_ISA) + +#endif diff --git a/sysdeps/x86_64/multiarch/strcmp-sse2.S b/sysdeps/x86_64/multiarch/strcmp-sse2.S index b8f95e59cf..b1220231ab 100644 --- a/sysdeps/x86_64/multiarch/strcmp-sse2.S +++ b/sysdeps/x86_64/multiarch/strcmp-sse2.S @@ -16,13 +16,2141 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) +#if IS_IN (libc) || IS_IN (rtld) + +# define STRCMP_ISA _sse2 +# include "strcmp-naming.h" + # include <sysdep.h> -# define STRCMP __strcmp_sse2 +# undef UPDATE_STRNCMP_COUNTER -# undef libc_hidden_builtin_def -# define libc_hidden_builtin_def(strcmp) -#endif +# ifndef LABEL +# define LABEL(l) L(l) +# endif + +# ifdef USE_AS_STRNCMP +/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz + if the new counter > the old one or is 0. */ +# define UPDATE_STRNCMP_COUNTER \ + /* calculate left number to compare */ \ + lea -16(%rcx, %r11), %r9; \ + cmp %r9, %r11; \ + jb LABEL(strcmp_exitz); \ + test %r9, %r9; \ + je LABEL(strcmp_exitz); \ + mov %r9, %r11 + +# elif defined USE_AS_STRCASECMP_L +# include "locale-defines.h" + +# define UPDATE_STRNCMP_COUNTER +# elif defined USE_AS_STRNCASECMP_L +# include "locale-defines.h" + +# define UPDATE_STRNCMP_COUNTER \ + /* calculate left number to compare */ \ + lea -16(%rcx, %r11), %r9; \ + cmp %r9, %r11; \ + jb LABEL(strcmp_exitz); \ + test %r9, %r9; \ + je LABEL(strcmp_exitz); \ + mov %r9, %r11 +# else +# define UPDATE_STRNCMP_COUNTER +# endif + + .text +# ifdef USE_AS_STRCASECMP_L +# ifndef ENTRY2 +# define ENTRY2(name) ENTRY (name) +# define END2(name) END (name) +# endif + +ENTRY2 (STRCASECMP) + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax + mov %fs:(%rax),%RDX_LP + + /* Either 1 or 5 bytes (dependeing if CET is enabled). */ + .p2align 4 +END2 (STRCASECMP) + /* FALLTHROUGH to strcasecmp_l. */ +# elif defined USE_AS_STRNCASECMP_L +# ifndef ENTRY2 +# define ENTRY2(name) ENTRY (name) +# define END2(name) END (name) +# endif + +ENTRY2 (STRCASECMP) + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax + mov %fs:(%rax),%RCX_LP + + /* Either 1 or 5 bytes (dependeing if CET is enabled). */ + .p2align 4 +END2 (STRCASECMP) + /* FALLTHROUGH to strncasecmp_l. */ +# endif + +ENTRY (STRCMP) +# ifdef USE_AS_STRCASECMP_L + /* We have to fall back on the C implementation for locales + with encodings not matching ASCII for single bytes. */ +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP +# else + mov (%rdx), %RAX_LP +# endif + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) + jne __strcasecmp_l_nonascii +# elif defined USE_AS_STRNCASECMP_L + /* We have to fall back on the C implementation for locales + with encodings not matching ASCII for single bytes. */ +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP +# else + mov (%rcx), %RAX_LP +# endif + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) + jne __strncasecmp_l_nonascii +# endif + +/* + * This implementation uses SSE to compare up to 16 bytes at a time. + */ +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + test %RDX_LP, %RDX_LP + je LABEL(strcmp_exitz) + cmp $1, %RDX_LP + je LABEL(Byte0) + mov %RDX_LP, %R11_LP +# endif + mov %esi, %ecx + mov %edi, %eax +/* Use 64bit AND here to avoid long NOP padding. */ + and $0x3f, %rcx /* rsi alignment in cache line */ + and $0x3f, %rax /* rdi alignment in cache line */ +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L + .section .rodata.cst16,"aM",@progbits,16 + .align 16 +.Llcase_min: + .quad 0x3f3f3f3f3f3f3f3f + .quad 0x3f3f3f3f3f3f3f3f +.Llcase_max: + .quad 0x9999999999999999 + .quad 0x9999999999999999 +.Lcase_add: + .quad 0x2020202020202020 + .quad 0x2020202020202020 + .previous + movdqa .Llcase_min(%rip), %xmm5 +# define LCASE_MIN_reg %xmm5 + movdqa .Llcase_max(%rip), %xmm6 +# define LCASE_MAX_reg %xmm6 + movdqa .Lcase_add(%rip), %xmm7 +# define CASE_ADD_reg %xmm7 +# endif + cmp $0x30, %ecx + ja LABEL(crosscache) /* rsi: 16-byte load will cross cache line */ + cmp $0x30, %eax + ja LABEL(crosscache) /* rdi: 16-byte load will cross cache line */ + movlpd (%rdi), %xmm1 + movlpd (%rsi), %xmm2 + movhpd 8(%rdi), %xmm1 + movhpd 8(%rsi), %xmm2 +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L +# define TOLOWER(reg1, reg2) \ + movdqa LCASE_MIN_reg, %xmm8; \ + movdqa LCASE_MIN_reg, %xmm9; \ + paddb reg1, %xmm8; \ + paddb reg2, %xmm9; \ + pcmpgtb LCASE_MAX_reg, %xmm8; \ + pcmpgtb LCASE_MAX_reg, %xmm9; \ + pandn CASE_ADD_reg, %xmm8; \ + pandn CASE_ADD_reg, %xmm9; \ + paddb %xmm8, reg1; \ + paddb %xmm9, reg2 + TOLOWER (%xmm1, %xmm2) +# else +# define TOLOWER(reg1, reg2) +# endif + pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */ + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ + pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */ + psubb %xmm0, %xmm1 /* packed sub of comparison results*/ + pmovmskb %xmm1, %edx + sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */ + jnz LABEL(less16bytes) /* If not, find different value or null char */ +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) /* finish comparision */ +# endif + add $16, %rsi /* prepare to search next 16 bytes */ + add $16, %rdi /* prepare to search next 16 bytes */ + + /* + * Determine source and destination string offsets from 16-byte alignment. + * Use relative offset difference between the two to determine which case + * below to use. + */ + .p2align 4 +LABEL(crosscache): + and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */ + and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */ + mov $0xffff, %edx /* for equivalent offset */ + xor %r8d, %r8d + and $0xf, %ecx /* offset of rsi */ + and $0xf, %eax /* offset of rdi */ + cmp %eax, %ecx + je LABEL(ashr_0) /* rsi and rdi relative offset same */ + ja LABEL(bigger) + mov %edx, %r8d /* r8d is offset flag for exit tail */ + xchg %ecx, %eax + xchg %rsi, %rdi +LABEL(bigger): + lea 15(%rax), %r9 + sub %rcx, %r9 + lea LABEL(unaligned_table)(%rip), %r10 + movslq (%r10, %r9,4), %r9 + lea (%r10, %r9), %r10 + _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ + +/* + * The following cases will be handled by ashr_0 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(0~15) n(0~15) 15(15+ n-n) ashr_0 + */ + .p2align 4 +LABEL(ashr_0): + + movdqa (%rsi), %xmm1 + pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L + pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */ +# else + movdqa (%rdi), %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */ +# endif + psubb %xmm0, %xmm1 /* packed sub of comparison results*/ + pmovmskb %xmm1, %r9d + shr %cl, %edx /* adjust 0xffff for offset */ + shr %cl, %r9d /* adjust for 16-byte offset */ + sub %r9d, %edx + /* + * edx must be the same with r9d if in left byte (16-rcx) is equal to + * the start from (16-rax) and no null char was seen. + */ + jne LABEL(less32bytes) /* mismatch or null char */ + UPDATE_STRNCMP_COUNTER + mov $16, %rcx + mov $16, %r9 + pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ + + /* + * Now both strings are aligned at 16-byte boundary. Loop over strings + * checking 32-bytes per iteration. + */ + .p2align 4 +LABEL(loop_ashr_0): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) /* mismatch or null char seen */ + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + add $16, %rcx + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + add $16, %rcx + jmp LABEL(loop_ashr_0) + +/* + * The following cases will be handled by ashr_1 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(15) n -15 0(15 +(n-15) - n) ashr_1 + */ + .p2align 4 +LABEL(ashr_1): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ + pslldq $15, %xmm2 /* shift first string to align with second */ + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */ + psubb %xmm0, %xmm2 /* packed sub of comparison results*/ + pmovmskb %xmm2, %r9d + shr %cl, %edx /* adjust 0xffff for offset */ + shr %cl, %r9d /* adjust for 16-byte offset */ + sub %r9d, %edx + jnz LABEL(less32bytes) /* mismatch or null char seen */ + movdqa (%rdi), %xmm3 + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads*/ + mov $1, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 1(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_1): + add $16, %r10 + jg LABEL(nibble_ashr_1) /* cross page boundary */ + +LABEL(gobble_ashr_1): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 /* store for next cycle */ + + psrldq $1, %xmm3 + pslldq $15, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_1) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 /* store for next cycle */ + + psrldq $1, %xmm3 + pslldq $15, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_1) + + /* + * Nibble avoids loads across page boundary. This is to avoid a potential + * access into unmapped memory. + */ + .p2align 4 +LABEL(nibble_ashr_1): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char*/ + pmovmskb %xmm0, %edx + test $0xfffe, %edx + jnz LABEL(ashr_1_exittail) /* find null char*/ + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $15, %r11 + jbe LABEL(ashr_1_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 /* substract 4K from %r10 */ + jmp LABEL(gobble_ashr_1) + + /* + * Once find null char, determine if there is a string mismatch + * before the null char. + */ + .p2align 4 +LABEL(ashr_1_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $1, %xmm0 + psrldq $1, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_2 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(14~15) n -14 1(15 +(n-14) - n) ashr_2 + */ + .p2align 4 +LABEL(ashr_2): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $14, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $2, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 2(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_2): + add $16, %r10 + jg LABEL(nibble_ashr_2) + +LABEL(gobble_ashr_2): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $2, %xmm3 + pslldq $14, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_2) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $2, %xmm3 + pslldq $14, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_2) + + .p2align 4 +LABEL(nibble_ashr_2): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xfffc, %edx + jnz LABEL(ashr_2_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $14, %r11 + jbe LABEL(ashr_2_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_2) + + .p2align 4 +LABEL(ashr_2_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $2, %xmm0 + psrldq $2, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_3 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(13~15) n -13 2(15 +(n-13) - n) ashr_3 + */ + .p2align 4 +LABEL(ashr_3): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $13, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $3, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 3(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_3): + add $16, %r10 + jg LABEL(nibble_ashr_3) + +LABEL(gobble_ashr_3): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $3, %xmm3 + pslldq $13, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_3) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $3, %xmm3 + pslldq $13, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_3) + + .p2align 4 +LABEL(nibble_ashr_3): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xfff8, %edx + jnz LABEL(ashr_3_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $13, %r11 + jbe LABEL(ashr_3_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_3) + + .p2align 4 +LABEL(ashr_3_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $3, %xmm0 + psrldq $3, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_4 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(12~15) n -12 3(15 +(n-12) - n) ashr_4 + */ + .p2align 4 +LABEL(ashr_4): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $12, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $4, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 4(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_4): + add $16, %r10 + jg LABEL(nibble_ashr_4) + +LABEL(gobble_ashr_4): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $4, %xmm3 + pslldq $12, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_4) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $4, %xmm3 + pslldq $12, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_4) + + .p2align 4 +LABEL(nibble_ashr_4): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xfff0, %edx + jnz LABEL(ashr_4_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $12, %r11 + jbe LABEL(ashr_4_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_4) + + .p2align 4 +LABEL(ashr_4_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $4, %xmm0 + psrldq $4, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_5 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5 + */ + .p2align 4 +LABEL(ashr_5): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $11, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $5, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 5(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_5): + add $16, %r10 + jg LABEL(nibble_ashr_5) + +LABEL(gobble_ashr_5): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $5, %xmm3 + pslldq $11, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_5) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $5, %xmm3 + pslldq $11, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_5) + + .p2align 4 +LABEL(nibble_ashr_5): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xffe0, %edx + jnz LABEL(ashr_5_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $11, %r11 + jbe LABEL(ashr_5_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_5) + + .p2align 4 +LABEL(ashr_5_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $5, %xmm0 + psrldq $5, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_6 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6 + */ + .p2align 4 +LABEL(ashr_6): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $10, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $6, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 6(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_6): + add $16, %r10 + jg LABEL(nibble_ashr_6) + +LABEL(gobble_ashr_6): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $6, %xmm3 + pslldq $10, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_6) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $6, %xmm3 + pslldq $10, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_6) + + .p2align 4 +LABEL(nibble_ashr_6): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xffc0, %edx + jnz LABEL(ashr_6_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $10, %r11 + jbe LABEL(ashr_6_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_6) + + .p2align 4 +LABEL(ashr_6_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $6, %xmm0 + psrldq $6, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_7 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7 + */ + .p2align 4 +LABEL(ashr_7): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $9, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $7, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 7(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_7): + add $16, %r10 + jg LABEL(nibble_ashr_7) + +LABEL(gobble_ashr_7): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $7, %xmm3 + pslldq $9, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_7) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $7, %xmm3 + pslldq $9, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_7) + + .p2align 4 +LABEL(nibble_ashr_7): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xff80, %edx + jnz LABEL(ashr_7_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $9, %r11 + jbe LABEL(ashr_7_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_7) + + .p2align 4 +LABEL(ashr_7_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $7, %xmm0 + psrldq $7, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_8 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8 + */ + .p2align 4 +LABEL(ashr_8): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $8, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $8, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 8(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_8): + add $16, %r10 + jg LABEL(nibble_ashr_8) + +LABEL(gobble_ashr_8): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $8, %xmm3 + pslldq $8, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif -#include <sysdeps/x86_64/strcmp.S> + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_8) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $8, %xmm3 + pslldq $8, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_8) + + .p2align 4 +LABEL(nibble_ashr_8): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xff00, %edx + jnz LABEL(ashr_8_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $8, %r11 + jbe LABEL(ashr_8_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_8) + + .p2align 4 +LABEL(ashr_8_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $8, %xmm0 + psrldq $8, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_9 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9 + */ + .p2align 4 +LABEL(ashr_9): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $7, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $9, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 9(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_9): + add $16, %r10 + jg LABEL(nibble_ashr_9) + +LABEL(gobble_ashr_9): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $9, %xmm3 + pslldq $7, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_9) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $9, %xmm3 + pslldq $7, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 /* store for next cycle */ + jmp LABEL(loop_ashr_9) + + .p2align 4 +LABEL(nibble_ashr_9): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xfe00, %edx + jnz LABEL(ashr_9_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $7, %r11 + jbe LABEL(ashr_9_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_9) + + .p2align 4 +LABEL(ashr_9_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $9, %xmm0 + psrldq $9, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_10 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10 + */ + .p2align 4 +LABEL(ashr_10): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $6, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $10, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 10(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_10): + add $16, %r10 + jg LABEL(nibble_ashr_10) + +LABEL(gobble_ashr_10): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $10, %xmm3 + pslldq $6, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_10) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $10, %xmm3 + pslldq $6, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_10) + + .p2align 4 +LABEL(nibble_ashr_10): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xfc00, %edx + jnz LABEL(ashr_10_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $6, %r11 + jbe LABEL(ashr_10_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_10) + + .p2align 4 +LABEL(ashr_10_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $10, %xmm0 + psrldq $10, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_11 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11 + */ + .p2align 4 +LABEL(ashr_11): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $5, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $11, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 11(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_11): + add $16, %r10 + jg LABEL(nibble_ashr_11) + +LABEL(gobble_ashr_11): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $11, %xmm3 + pslldq $5, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_11) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $11, %xmm3 + pslldq $5, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_11) + + .p2align 4 +LABEL(nibble_ashr_11): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xf800, %edx + jnz LABEL(ashr_11_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $5, %r11 + jbe LABEL(ashr_11_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_11) + + .p2align 4 +LABEL(ashr_11_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $11, %xmm0 + psrldq $11, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_12 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12 + */ + .p2align 4 +LABEL(ashr_12): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $4, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $12, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 12(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_12): + add $16, %r10 + jg LABEL(nibble_ashr_12) + +LABEL(gobble_ashr_12): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $12, %xmm3 + pslldq $4, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_12) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $12, %xmm3 + pslldq $4, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_12) + + .p2align 4 +LABEL(nibble_ashr_12): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xf000, %edx + jnz LABEL(ashr_12_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $4, %r11 + jbe LABEL(ashr_12_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_12) + + .p2align 4 +LABEL(ashr_12_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $12, %xmm0 + psrldq $12, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_13 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13 + */ + .p2align 4 +LABEL(ashr_13): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $3, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $13, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 13(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_13): + add $16, %r10 + jg LABEL(nibble_ashr_13) + +LABEL(gobble_ashr_13): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $13, %xmm3 + pslldq $3, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_13) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $13, %xmm3 + pslldq $3, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_13) + + .p2align 4 +LABEL(nibble_ashr_13): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xe000, %edx + jnz LABEL(ashr_13_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $3, %r11 + jbe LABEL(ashr_13_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_13) + + .p2align 4 +LABEL(ashr_13_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $13, %xmm0 + psrldq $13, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_14 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14 + */ + .p2align 4 +LABEL(ashr_14): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $2, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $14, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 14(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_14): + add $16, %r10 + jg LABEL(nibble_ashr_14) + +LABEL(gobble_ashr_14): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $14, %xmm3 + pslldq $2, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_14) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $14, %xmm3 + pslldq $2, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_14) + + .p2align 4 +LABEL(nibble_ashr_14): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0xc000, %edx + jnz LABEL(ashr_14_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmp $2, %r11 + jbe LABEL(ashr_14_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_14) + + .p2align 4 +LABEL(ashr_14_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $14, %xmm0 + psrldq $14, %xmm3 + jmp LABEL(aftertail) + +/* + * The following cases will be handled by ashr_15 + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case + * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15 + */ + .p2align 4 +LABEL(ashr_15): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + pslldq $1, %xmm2 + TOLOWER (%xmm1, %xmm2) + pcmpeqb %xmm1, %xmm2 + psubb %xmm0, %xmm2 + pmovmskb %xmm2, %r9d + shr %cl, %edx + shr %cl, %r9d + sub %r9d, %edx + jnz LABEL(less32bytes) + + movdqa (%rdi), %xmm3 + + UPDATE_STRNCMP_COUNTER + + pxor %xmm0, %xmm0 + mov $16, %rcx /* index for loads */ + mov $15, %r9d /* byte position left over from less32bytes case */ + /* + * Setup %r10 value allows us to detect crossing a page boundary. + * When %r10 goes positive we have crossed a page boundary and + * need to do a nibble. + */ + lea 15(%rdi), %r10 + and $0xfff, %r10 /* offset into 4K page */ + + sub $0x1000, %r10 /* subtract 4K pagesize */ + + .p2align 4 +LABEL(loop_ashr_15): + add $16, %r10 + jg LABEL(nibble_ashr_15) + +LABEL(gobble_ashr_15): + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $15, %xmm3 + pslldq $1, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + + add $16, %r10 + jg LABEL(nibble_ashr_15) /* cross page boundary */ + + movdqa (%rsi, %rcx), %xmm1 + movdqa (%rdi, %rcx), %xmm2 + movdqa %xmm2, %xmm4 + + psrldq $15, %xmm3 + pslldq $1, %xmm2 + por %xmm3, %xmm2 /* merge into one 16byte value */ + + TOLOWER (%xmm1, %xmm2) + + pcmpeqb %xmm1, %xmm0 + pcmpeqb %xmm2, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + sub $0xffff, %edx + jnz LABEL(exit) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub $16, %r11 + jbe LABEL(strcmp_exitz) +# endif + + add $16, %rcx + movdqa %xmm4, %xmm3 + jmp LABEL(loop_ashr_15) + + .p2align 4 +LABEL(nibble_ashr_15): + pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ + pmovmskb %xmm0, %edx + test $0x8000, %edx + jnz LABEL(ashr_15_exittail) + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + cmpq $1, %r11 + jbe LABEL(ashr_15_exittail) +# endif + + pxor %xmm0, %xmm0 + sub $0x1000, %r10 + jmp LABEL(gobble_ashr_15) + + .p2align 4 +LABEL(ashr_15_exittail): + movdqa (%rsi, %rcx), %xmm1 + psrldq $15, %xmm3 + psrldq $15, %xmm0 + + .p2align 4 +LABEL(aftertail): + TOLOWER (%xmm1, %xmm3) + pcmpeqb %xmm3, %xmm1 + psubb %xmm0, %xmm1 + pmovmskb %xmm1, %edx + not %edx + + .p2align 4 +LABEL(exit): + lea -16(%r9, %rcx), %rax /* locate the exact offset for rdi */ +LABEL(less32bytes): + lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */ + lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */ + test %r8d, %r8d + jz LABEL(ret) + xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ + + .p2align 4 +LABEL(ret): +LABEL(less16bytes): + bsf %rdx, %rdx /* find and store bit index in %rdx */ + +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L + sub %rdx, %r11 + jbe LABEL(strcmp_exitz) +# endif + movzbl (%rsi, %rdx), %ecx + movzbl (%rdi, %rdx), %eax + +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx + movl (%rdx,%rcx,4), %ecx + movl (%rdx,%rax,4), %eax +# endif + + sub %ecx, %eax + ret + +LABEL(strcmp_exitz): + xor %eax, %eax + ret + + .p2align 4 +LABEL(Byte0): + movzbl (%rsi), %ecx + movzbl (%rdi), %eax + +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx + movl (%rdx,%rcx,4), %ecx + movl (%rdx,%rax,4), %eax +# endif + + sub %ecx, %eax + ret +END (STRCMP) + + .section .rodata,"a",@progbits + .p2align 3 +LABEL(unaligned_table): + .int LABEL(ashr_1) - LABEL(unaligned_table) + .int LABEL(ashr_2) - LABEL(unaligned_table) + .int LABEL(ashr_3) - LABEL(unaligned_table) + .int LABEL(ashr_4) - LABEL(unaligned_table) + .int LABEL(ashr_5) - LABEL(unaligned_table) + .int LABEL(ashr_6) - LABEL(unaligned_table) + .int LABEL(ashr_7) - LABEL(unaligned_table) + .int LABEL(ashr_8) - LABEL(unaligned_table) + .int LABEL(ashr_9) - LABEL(unaligned_table) + .int LABEL(ashr_10) - LABEL(unaligned_table) + .int LABEL(ashr_11) - LABEL(unaligned_table) + .int LABEL(ashr_12) - LABEL(unaligned_table) + .int LABEL(ashr_13) - LABEL(unaligned_table) + .int LABEL(ashr_14) - LABEL(unaligned_table) + .int LABEL(ashr_15) - LABEL(unaligned_table) + .int LABEL(ashr_0) - LABEL(unaligned_table) +#endif diff --git a/sysdeps/x86_64/multiarch/strncase_l-sse2.S b/sysdeps/x86_64/multiarch/strncase_l-sse2.S index 0ca4c836b2..fd8ad07450 100644 --- a/sysdeps/x86_64/multiarch/strncase_l-sse2.S +++ b/sysdeps/x86_64/multiarch/strncase_l-sse2.S @@ -16,8 +16,5 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#define STRCMP __strncasecmp_l_sse2 -#define NO_NOLOCALE_ALIAS #define USE_AS_STRNCASECMP_L -#define __strncasecmp __strncasecmp_sse2 -#include <sysdeps/x86_64/strcmp.S> +#include "strcmp-sse2.S" diff --git a/sysdeps/x86_64/multiarch/strncmp-sse2.S b/sysdeps/x86_64/multiarch/strncmp-sse2.S index e3ba94f926..2152b8dc3d 100644 --- a/sysdeps/x86_64/multiarch/strncmp-sse2.S +++ b/sysdeps/x86_64/multiarch/strncmp-sse2.S @@ -16,15 +16,5 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#include <sysdep.h> - -#if IS_IN (libc) -# define STRCMP __strncmp_sse2 -# undef libc_hidden_builtin_def -# define libc_hidden_builtin_def(strcmp) -#else -# define STRCMP strncmp -#endif - #define USE_AS_STRNCMP -#include <sysdeps/x86_64/strcmp.S> +#include "strcmp-sse2.S" diff --git a/sysdeps/x86_64/strcasecmp_l.S b/sysdeps/x86_64/strcasecmp_l.S index 5456b3a49e..84fd7fdfd3 100644 --- a/sysdeps/x86_64/strcasecmp_l.S +++ b/sysdeps/x86_64/strcasecmp_l.S @@ -1,6 +1,11 @@ -#define STRCMP __strcasecmp_l -#define USE_AS_STRCASECMP_L -#include "strcmp.S" +/* Symbols = __strcasecmp_l and __strcasecmp. */ + +#include "multiarch/strcasecmp_l-sse2.S" + +libc_hidden_builtin_def (__strcasecmp_l) weak_alias (__strcasecmp_l, strcasecmp_l) libc_hidden_def (strcasecmp_l) + +weak_alias (__strcasecmp, strcasecmp) +libc_hidden_def (__strcasecmp) diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S index c38dc627f9..19e54bd3a7 100644 --- a/sysdeps/x86_64/strcmp.S +++ b/sysdeps/x86_64/strcmp.S @@ -16,2148 +16,7 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#include <sysdep.h> -#include "asm-syntax.h" +/* Symbol = strcmp. */ -#undef UPDATE_STRNCMP_COUNTER - -#ifndef LABEL -#define LABEL(l) L(l) -#endif - -#ifdef USE_AS_STRNCMP -/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz - if the new counter > the old one or is 0. */ -# define UPDATE_STRNCMP_COUNTER \ - /* calculate left number to compare */ \ - lea -16(%rcx, %r11), %r9; \ - cmp %r9, %r11; \ - jb LABEL(strcmp_exitz); \ - test %r9, %r9; \ - je LABEL(strcmp_exitz); \ - mov %r9, %r11 - -#elif defined USE_AS_STRCASECMP_L -# include "locale-defines.h" - -# define UPDATE_STRNCMP_COUNTER -#elif defined USE_AS_STRNCASECMP_L -# include "locale-defines.h" - -# define UPDATE_STRNCMP_COUNTER \ - /* calculate left number to compare */ \ - lea -16(%rcx, %r11), %r9; \ - cmp %r9, %r11; \ - jb LABEL(strcmp_exitz); \ - test %r9, %r9; \ - je LABEL(strcmp_exitz); \ - mov %r9, %r11 -#else -# define UPDATE_STRNCMP_COUNTER -# ifndef STRCMP -# define STRCMP strcmp -# endif -#endif - - .text -#ifdef USE_AS_STRCASECMP_L -# ifndef ENTRY2 -# define ENTRY2(name) ENTRY (name) -# define END2(name) END (name) -# endif - -ENTRY2 (__strcasecmp) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - mov %fs:(%rax),%RDX_LP - - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ - .p2align 4 -END2 (__strcasecmp) -# ifndef NO_NOLOCALE_ALIAS -weak_alias (__strcasecmp, strcasecmp) -libc_hidden_def (__strcasecmp) -# endif - /* FALLTHROUGH to strcasecmp_l. */ -#elif defined USE_AS_STRNCASECMP_L -# ifndef ENTRY2 -# define ENTRY2(name) ENTRY (name) -# define END2(name) END (name) -# endif - -ENTRY2 (__strncasecmp) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - mov %fs:(%rax),%RCX_LP - - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ - .p2align 4 -END2 (__strncasecmp) -# ifndef NO_NOLOCALE_ALIAS -weak_alias (__strncasecmp, strncasecmp) -libc_hidden_def (__strncasecmp) -# endif - /* FALLTHROUGH to strncasecmp_l. */ -#endif - -ENTRY (STRCMP) -#ifdef USE_AS_STRCASECMP_L - /* We have to fall back on the C implementation for locales - with encodings not matching ASCII for single bytes. */ -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP -# else - mov (%rdx), %RAX_LP -# endif - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) - jne __strcasecmp_l_nonascii -#elif defined USE_AS_STRNCASECMP_L - /* We have to fall back on the C implementation for locales - with encodings not matching ASCII for single bytes. */ -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP -# else - mov (%rcx), %RAX_LP -# endif - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) - jne __strncasecmp_l_nonascii -#endif - -/* - * This implementation uses SSE to compare up to 16 bytes at a time. - */ -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - test %RDX_LP, %RDX_LP - je LABEL(strcmp_exitz) - cmp $1, %RDX_LP - je LABEL(Byte0) - mov %RDX_LP, %R11_LP -#endif - mov %esi, %ecx - mov %edi, %eax -/* Use 64bit AND here to avoid long NOP padding. */ - and $0x3f, %rcx /* rsi alignment in cache line */ - and $0x3f, %rax /* rdi alignment in cache line */ -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - .section .rodata.cst16,"aM",@progbits,16 - .align 16 -.Llcase_min: - .quad 0x3f3f3f3f3f3f3f3f - .quad 0x3f3f3f3f3f3f3f3f -.Llcase_max: - .quad 0x9999999999999999 - .quad 0x9999999999999999 -.Lcase_add: - .quad 0x2020202020202020 - .quad 0x2020202020202020 - .previous - movdqa .Llcase_min(%rip), %xmm5 -# define LCASE_MIN_reg %xmm5 - movdqa .Llcase_max(%rip), %xmm6 -# define LCASE_MAX_reg %xmm6 - movdqa .Lcase_add(%rip), %xmm7 -# define CASE_ADD_reg %xmm7 -#endif - cmp $0x30, %ecx - ja LABEL(crosscache) /* rsi: 16-byte load will cross cache line */ - cmp $0x30, %eax - ja LABEL(crosscache) /* rdi: 16-byte load will cross cache line */ - movlpd (%rdi), %xmm1 - movlpd (%rsi), %xmm2 - movhpd 8(%rdi), %xmm1 - movhpd 8(%rsi), %xmm2 -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L -# define TOLOWER(reg1, reg2) \ - movdqa LCASE_MIN_reg, %xmm8; \ - movdqa LCASE_MIN_reg, %xmm9; \ - paddb reg1, %xmm8; \ - paddb reg2, %xmm9; \ - pcmpgtb LCASE_MAX_reg, %xmm8; \ - pcmpgtb LCASE_MAX_reg, %xmm9; \ - pandn CASE_ADD_reg, %xmm8; \ - pandn CASE_ADD_reg, %xmm9; \ - paddb %xmm8, reg1; \ - paddb %xmm9, reg2 - TOLOWER (%xmm1, %xmm2) -#else -# define TOLOWER(reg1, reg2) -#endif - pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */ - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ - pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */ - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ - pmovmskb %xmm1, %edx - sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */ - jnz LABEL(less16bytes) /* If not, find different value or null char */ -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) /* finish comparision */ -#endif - add $16, %rsi /* prepare to search next 16 bytes */ - add $16, %rdi /* prepare to search next 16 bytes */ - - /* - * Determine source and destination string offsets from 16-byte alignment. - * Use relative offset difference between the two to determine which case - * below to use. - */ - .p2align 4 -LABEL(crosscache): - and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */ - and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */ - mov $0xffff, %edx /* for equivalent offset */ - xor %r8d, %r8d - and $0xf, %ecx /* offset of rsi */ - and $0xf, %eax /* offset of rdi */ - cmp %eax, %ecx - je LABEL(ashr_0) /* rsi and rdi relative offset same */ - ja LABEL(bigger) - mov %edx, %r8d /* r8d is offset flag for exit tail */ - xchg %ecx, %eax - xchg %rsi, %rdi -LABEL(bigger): - lea 15(%rax), %r9 - sub %rcx, %r9 - lea LABEL(unaligned_table)(%rip), %r10 - movslq (%r10, %r9,4), %r9 - lea (%r10, %r9), %r10 - _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ - -/* - * The following cases will be handled by ashr_0 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(0~15) n(0~15) 15(15+ n-n) ashr_0 - */ - .p2align 4 -LABEL(ashr_0): - - movdqa (%rsi), %xmm1 - pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */ -#else - movdqa (%rdi), %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */ -#endif - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ - pmovmskb %xmm1, %r9d - shr %cl, %edx /* adjust 0xffff for offset */ - shr %cl, %r9d /* adjust for 16-byte offset */ - sub %r9d, %edx - /* - * edx must be the same with r9d if in left byte (16-rcx) is equal to - * the start from (16-rax) and no null char was seen. - */ - jne LABEL(less32bytes) /* mismatch or null char */ - UPDATE_STRNCMP_COUNTER - mov $16, %rcx - mov $16, %r9 - pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ - - /* - * Now both strings are aligned at 16-byte boundary. Loop over strings - * checking 32-bytes per iteration. - */ - .p2align 4 -LABEL(loop_ashr_0): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) /* mismatch or null char seen */ - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rcx - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rcx - jmp LABEL(loop_ashr_0) - -/* - * The following cases will be handled by ashr_1 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(15) n -15 0(15 +(n-15) - n) ashr_1 - */ - .p2align 4 -LABEL(ashr_1): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ - pslldq $15, %xmm2 /* shift first string to align with second */ - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */ - psubb %xmm0, %xmm2 /* packed sub of comparison results*/ - pmovmskb %xmm2, %r9d - shr %cl, %edx /* adjust 0xffff for offset */ - shr %cl, %r9d /* adjust for 16-byte offset */ - sub %r9d, %edx - jnz LABEL(less32bytes) /* mismatch or null char seen */ - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads*/ - mov $1, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 1(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_1): - add $16, %r10 - jg LABEL(nibble_ashr_1) /* cross page boundary */ - -LABEL(gobble_ashr_1): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 /* store for next cycle */ - - psrldq $1, %xmm3 - pslldq $15, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_1) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 /* store for next cycle */ - - psrldq $1, %xmm3 - pslldq $15, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_1) - - /* - * Nibble avoids loads across page boundary. This is to avoid a potential - * access into unmapped memory. - */ - .p2align 4 -LABEL(nibble_ashr_1): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char*/ - pmovmskb %xmm0, %edx - test $0xfffe, %edx - jnz LABEL(ashr_1_exittail) /* find null char*/ - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $15, %r11 - jbe LABEL(ashr_1_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 /* substract 4K from %r10 */ - jmp LABEL(gobble_ashr_1) - - /* - * Once find null char, determine if there is a string mismatch - * before the null char. - */ - .p2align 4 -LABEL(ashr_1_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $1, %xmm0 - psrldq $1, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_2 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(14~15) n -14 1(15 +(n-14) - n) ashr_2 - */ - .p2align 4 -LABEL(ashr_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $14, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $2, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 2(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_2): - add $16, %r10 - jg LABEL(nibble_ashr_2) - -LABEL(gobble_ashr_2): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $2, %xmm3 - pslldq $14, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_2) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $2, %xmm3 - pslldq $14, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_2) - - .p2align 4 -LABEL(nibble_ashr_2): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xfffc, %edx - jnz LABEL(ashr_2_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $14, %r11 - jbe LABEL(ashr_2_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_2) - - .p2align 4 -LABEL(ashr_2_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $2, %xmm0 - psrldq $2, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_3 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(13~15) n -13 2(15 +(n-13) - n) ashr_3 - */ - .p2align 4 -LABEL(ashr_3): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $13, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $3, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 3(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_3): - add $16, %r10 - jg LABEL(nibble_ashr_3) - -LABEL(gobble_ashr_3): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $3, %xmm3 - pslldq $13, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_3) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $3, %xmm3 - pslldq $13, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_3) - - .p2align 4 -LABEL(nibble_ashr_3): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xfff8, %edx - jnz LABEL(ashr_3_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $13, %r11 - jbe LABEL(ashr_3_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_3) - - .p2align 4 -LABEL(ashr_3_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $3, %xmm0 - psrldq $3, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_4 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(12~15) n -12 3(15 +(n-12) - n) ashr_4 - */ - .p2align 4 -LABEL(ashr_4): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $12, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $4, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 4(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_4): - add $16, %r10 - jg LABEL(nibble_ashr_4) - -LABEL(gobble_ashr_4): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $4, %xmm3 - pslldq $12, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_4) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $4, %xmm3 - pslldq $12, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_4) - - .p2align 4 -LABEL(nibble_ashr_4): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xfff0, %edx - jnz LABEL(ashr_4_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $12, %r11 - jbe LABEL(ashr_4_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_4) - - .p2align 4 -LABEL(ashr_4_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $4, %xmm0 - psrldq $4, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_5 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5 - */ - .p2align 4 -LABEL(ashr_5): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $11, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $5, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 5(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_5): - add $16, %r10 - jg LABEL(nibble_ashr_5) - -LABEL(gobble_ashr_5): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $5, %xmm3 - pslldq $11, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_5) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $5, %xmm3 - pslldq $11, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_5) - - .p2align 4 -LABEL(nibble_ashr_5): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xffe0, %edx - jnz LABEL(ashr_5_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $11, %r11 - jbe LABEL(ashr_5_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_5) - - .p2align 4 -LABEL(ashr_5_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $5, %xmm0 - psrldq $5, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_6 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6 - */ - .p2align 4 -LABEL(ashr_6): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $10, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $6, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 6(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_6): - add $16, %r10 - jg LABEL(nibble_ashr_6) - -LABEL(gobble_ashr_6): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $6, %xmm3 - pslldq $10, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_6) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $6, %xmm3 - pslldq $10, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_6) - - .p2align 4 -LABEL(nibble_ashr_6): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xffc0, %edx - jnz LABEL(ashr_6_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $10, %r11 - jbe LABEL(ashr_6_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_6) - - .p2align 4 -LABEL(ashr_6_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $6, %xmm0 - psrldq $6, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_7 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7 - */ - .p2align 4 -LABEL(ashr_7): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $9, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $7, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 7(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_7): - add $16, %r10 - jg LABEL(nibble_ashr_7) - -LABEL(gobble_ashr_7): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $7, %xmm3 - pslldq $9, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_7) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $7, %xmm3 - pslldq $9, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_7) - - .p2align 4 -LABEL(nibble_ashr_7): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xff80, %edx - jnz LABEL(ashr_7_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $9, %r11 - jbe LABEL(ashr_7_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_7) - - .p2align 4 -LABEL(ashr_7_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $7, %xmm0 - psrldq $7, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_8 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8 - */ - .p2align 4 -LABEL(ashr_8): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $8, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $8, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 8(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_8): - add $16, %r10 - jg LABEL(nibble_ashr_8) - -LABEL(gobble_ashr_8): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $8, %xmm3 - pslldq $8, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_8) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $8, %xmm3 - pslldq $8, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_8) - - .p2align 4 -LABEL(nibble_ashr_8): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xff00, %edx - jnz LABEL(ashr_8_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $8, %r11 - jbe LABEL(ashr_8_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_8) - - .p2align 4 -LABEL(ashr_8_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $8, %xmm0 - psrldq $8, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_9 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9 - */ - .p2align 4 -LABEL(ashr_9): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $7, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $9, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 9(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_9): - add $16, %r10 - jg LABEL(nibble_ashr_9) - -LABEL(gobble_ashr_9): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $9, %xmm3 - pslldq $7, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_9) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $9, %xmm3 - pslldq $7, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 /* store for next cycle */ - jmp LABEL(loop_ashr_9) - - .p2align 4 -LABEL(nibble_ashr_9): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xfe00, %edx - jnz LABEL(ashr_9_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $7, %r11 - jbe LABEL(ashr_9_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_9) - - .p2align 4 -LABEL(ashr_9_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $9, %xmm0 - psrldq $9, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_10 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10 - */ - .p2align 4 -LABEL(ashr_10): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $6, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $10, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 10(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_10): - add $16, %r10 - jg LABEL(nibble_ashr_10) - -LABEL(gobble_ashr_10): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $10, %xmm3 - pslldq $6, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_10) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $10, %xmm3 - pslldq $6, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_10) - - .p2align 4 -LABEL(nibble_ashr_10): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xfc00, %edx - jnz LABEL(ashr_10_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $6, %r11 - jbe LABEL(ashr_10_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_10) - - .p2align 4 -LABEL(ashr_10_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $10, %xmm0 - psrldq $10, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_11 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11 - */ - .p2align 4 -LABEL(ashr_11): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $5, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $11, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 11(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_11): - add $16, %r10 - jg LABEL(nibble_ashr_11) - -LABEL(gobble_ashr_11): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $11, %xmm3 - pslldq $5, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_11) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $11, %xmm3 - pslldq $5, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_11) - - .p2align 4 -LABEL(nibble_ashr_11): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xf800, %edx - jnz LABEL(ashr_11_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $5, %r11 - jbe LABEL(ashr_11_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_11) - - .p2align 4 -LABEL(ashr_11_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $11, %xmm0 - psrldq $11, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_12 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12 - */ - .p2align 4 -LABEL(ashr_12): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $4, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $12, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 12(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_12): - add $16, %r10 - jg LABEL(nibble_ashr_12) - -LABEL(gobble_ashr_12): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $12, %xmm3 - pslldq $4, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_12) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $12, %xmm3 - pslldq $4, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_12) - - .p2align 4 -LABEL(nibble_ashr_12): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xf000, %edx - jnz LABEL(ashr_12_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $4, %r11 - jbe LABEL(ashr_12_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_12) - - .p2align 4 -LABEL(ashr_12_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $12, %xmm0 - psrldq $12, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_13 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13 - */ - .p2align 4 -LABEL(ashr_13): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $3, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $13, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 13(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_13): - add $16, %r10 - jg LABEL(nibble_ashr_13) - -LABEL(gobble_ashr_13): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $13, %xmm3 - pslldq $3, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_13) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $13, %xmm3 - pslldq $3, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_13) - - .p2align 4 -LABEL(nibble_ashr_13): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xe000, %edx - jnz LABEL(ashr_13_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $3, %r11 - jbe LABEL(ashr_13_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_13) - - .p2align 4 -LABEL(ashr_13_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $13, %xmm0 - psrldq $13, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_14 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14 - */ - .p2align 4 -LABEL(ashr_14): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $2, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $14, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 14(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_14): - add $16, %r10 - jg LABEL(nibble_ashr_14) - -LABEL(gobble_ashr_14): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $14, %xmm3 - pslldq $2, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_14) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $14, %xmm3 - pslldq $2, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_14) - - .p2align 4 -LABEL(nibble_ashr_14): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0xc000, %edx - jnz LABEL(ashr_14_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp $2, %r11 - jbe LABEL(ashr_14_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_14) - - .p2align 4 -LABEL(ashr_14_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $14, %xmm0 - psrldq $14, %xmm3 - jmp LABEL(aftertail) - -/* - * The following cases will be handled by ashr_15 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15 - */ - .p2align 4 -LABEL(ashr_15): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - pslldq $1, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - mov $16, %rcx /* index for loads */ - mov $15, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 15(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - - sub $0x1000, %r10 /* subtract 4K pagesize */ - - .p2align 4 -LABEL(loop_ashr_15): - add $16, %r10 - jg LABEL(nibble_ashr_15) - -LABEL(gobble_ashr_15): - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $15, %xmm3 - pslldq $1, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - - add $16, %r10 - jg LABEL(nibble_ashr_15) /* cross page boundary */ - - movdqa (%rsi, %rcx), %xmm1 - movdqa (%rdi, %rcx), %xmm2 - movdqa %xmm2, %xmm4 - - psrldq $15, %xmm3 - pslldq $1, %xmm2 - por %xmm3, %xmm2 /* merge into one 16byte value */ - - TOLOWER (%xmm1, %xmm2) - - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm2, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - sub $0xffff, %edx - jnz LABEL(exit) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rcx - movdqa %xmm4, %xmm3 - jmp LABEL(loop_ashr_15) - - .p2align 4 -LABEL(nibble_ashr_15): - pcmpeqb %xmm3, %xmm0 /* check nibble for null char */ - pmovmskb %xmm0, %edx - test $0x8000, %edx - jnz LABEL(ashr_15_exittail) - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmpq $1, %r11 - jbe LABEL(ashr_15_exittail) -#endif - - pxor %xmm0, %xmm0 - sub $0x1000, %r10 - jmp LABEL(gobble_ashr_15) - - .p2align 4 -LABEL(ashr_15_exittail): - movdqa (%rsi, %rcx), %xmm1 - psrldq $15, %xmm3 - psrldq $15, %xmm0 - - .p2align 4 -LABEL(aftertail): - TOLOWER (%xmm1, %xmm3) - pcmpeqb %xmm3, %xmm1 - psubb %xmm0, %xmm1 - pmovmskb %xmm1, %edx - not %edx - - .p2align 4 -LABEL(exit): - lea -16(%r9, %rcx), %rax /* locate the exact offset for rdi */ -LABEL(less32bytes): - lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */ - lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */ - test %r8d, %r8d - jz LABEL(ret) - xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ - - .p2align 4 -LABEL(ret): -LABEL(less16bytes): - bsf %rdx, %rdx /* find and store bit index in %rdx */ - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rdx, %r11 - jbe LABEL(strcmp_exitz) -#endif - movzbl (%rsi, %rdx), %ecx - movzbl (%rdi, %rdx), %eax - -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx - movl (%rdx,%rcx,4), %ecx - movl (%rdx,%rax,4), %eax -#endif - - sub %ecx, %eax - ret - -LABEL(strcmp_exitz): - xor %eax, %eax - ret - - .p2align 4 -LABEL(Byte0): - movzbl (%rsi), %ecx - movzbl (%rdi), %eax - -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx - movl (%rdx,%rcx,4), %ecx - movl (%rdx,%rax,4), %eax -#endif - - sub %ecx, %eax - ret -END (STRCMP) - - .section .rodata,"a",@progbits - .p2align 3 -LABEL(unaligned_table): - .int LABEL(ashr_1) - LABEL(unaligned_table) - .int LABEL(ashr_2) - LABEL(unaligned_table) - .int LABEL(ashr_3) - LABEL(unaligned_table) - .int LABEL(ashr_4) - LABEL(unaligned_table) - .int LABEL(ashr_5) - LABEL(unaligned_table) - .int LABEL(ashr_6) - LABEL(unaligned_table) - .int LABEL(ashr_7) - LABEL(unaligned_table) - .int LABEL(ashr_8) - LABEL(unaligned_table) - .int LABEL(ashr_9) - LABEL(unaligned_table) - .int LABEL(ashr_10) - LABEL(unaligned_table) - .int LABEL(ashr_11) - LABEL(unaligned_table) - .int LABEL(ashr_12) - LABEL(unaligned_table) - .int LABEL(ashr_13) - LABEL(unaligned_table) - .int LABEL(ashr_14) - LABEL(unaligned_table) - .int LABEL(ashr_15) - LABEL(unaligned_table) - .int LABEL(ashr_0) - LABEL(unaligned_table) -libc_hidden_builtin_def (STRCMP) +#include "multiarch/strcmp-sse2.S" +libc_hidden_builtin_def (strcmp) diff --git a/sysdeps/x86_64/strncase_l.S b/sysdeps/x86_64/strncase_l.S index c725cd85b3..3780fc50b1 100644 --- a/sysdeps/x86_64/strncase_l.S +++ b/sysdeps/x86_64/strncase_l.S @@ -1,6 +1,11 @@ -#define STRCMP __strncasecmp_l -#define USE_AS_STRNCASECMP_L -#include "strcmp.S" +/* Symbols = __strncasecmp_l and __strncasecmp. */ + +#include "multiarch/strncase_l-sse2.S" + +libc_hidden_builtin_def (__strncasecmp_l) weak_alias (__strncasecmp_l, strncasecmp_l) libc_hidden_def (strncasecmp_l) + +weak_alias (__strncasecmp, strncasecmp) +libc_hidden_def (__strncasecmp) diff --git a/sysdeps/x86_64/strncmp.S b/sysdeps/x86_64/strncmp.S index 0af34e7f15..13d9e82ee2 100644 --- a/sysdeps/x86_64/strncmp.S +++ b/sysdeps/x86_64/strncmp.S @@ -1,3 +1,4 @@ -#define STRCMP strncmp -#define USE_AS_STRNCMP -#include "strcmp.S" +/* Symbol = strncmp. */ + +#include "multiarch/strncmp-sse2.S" +libc_hidden_builtin_def (strncmp)

[v1,2/4] x86: Move strcmp SSE2 implementation to multiarch/strcmp-sse2.S

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