From patchwork Fri May 21 15:30:27 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 53170 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 0A07CB7D27 for ; Sat, 22 May 2010 01:39:03 +1000 (EST) Received: from localhost ([127.0.0.1]:35118 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OFUJP-0005nJ-0j for incoming@patchwork.ozlabs.org; Fri, 21 May 2010 11:38:59 -0400 Received: from [140.186.70.92] (port=53114 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OFUBY-0000sh-88 for qemu-devel@nongnu.org; Fri, 21 May 2010 11:30:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OFUBR-0003KW-VO for qemu-devel@nongnu.org; Fri, 21 May 2010 11:30:51 -0400 Received: from are.twiddle.net ([75.149.56.221]:52873) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OFUBR-0003KJ-Ll for qemu-devel@nongnu.org; Fri, 21 May 2010 11:30:45 -0400 Received: from anchor.twiddle.home (anchor.twiddle.home [172.31.0.4]) by are.twiddle.net (Postfix) with ESMTPS id 28AB7F20; Fri, 21 May 2010 08:30:45 -0700 (PDT) Received: from anchor.twiddle.home (anchor.twiddle.home [127.0.0.1]) by anchor.twiddle.home (8.14.4/8.14.4) with ESMTP id o4LFUiOU018058; Fri, 21 May 2010 08:30:44 -0700 Received: (from rth@localhost) by anchor.twiddle.home (8.14.4/8.14.4/Submit) id o4LFUipv018057; Fri, 21 May 2010 08:30:44 -0700 From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 21 May 2010 08:30:27 -0700 Message-Id: <2fab849365127fc60100b50d0b9bf4b91b673298.1274455111.git.rth@twiddle.net> X-Mailer: git-send-email 1.7.0.1 In-Reply-To: References: In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Cc: aurelien@aurel32.net Subject: [Qemu-devel] [PATCH 07/15] tcg-i386: Tidy calls. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Define OPC_CALL_Jz, generated by tcg_out_calli; use the later throughout. Unify the calls within qemu_st; adjust the stack with a single pop if applicable. Define and use EXT_CALLN_Ev for indirect calls. Signed-off-by: Richard Henderson --- tcg/i386/tcg-target.c | 49 +++++++++++++++++++++++++++---------------------- 1 files changed, 27 insertions(+), 22 deletions(-) diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index a487375..28a01f3 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -163,6 +163,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ #define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) #define OPC_BSWAP (0xc8 | P_EXT) +#define OPC_CALL_Jz (0xe8) #define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) #define OPC_DEC_r32 (0x48) #define OPC_INC_r32 (0x40) @@ -205,6 +206,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define SHIFT_SAR 7 /* Group 5 opcode extensions for 0xff. */ +#define EXT_CALLN_Ev 2 #define EXT_JMPN_Ev 4 /* Condition codes to be added to OPC_JCC_{long,short}. */ @@ -621,6 +623,12 @@ static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, } } +static void tcg_out_calli(TCGContext *s, tcg_target_long dest) +{ + tcg_out_opc(s, OPC_CALL_Jz); + tcg_out32(s, dest - (tcg_target_long)s->code_ptr - 4); +} + #if defined(CONFIG_SOFTMMU) #include "../../softmmu_defs.h" @@ -725,9 +733,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, tcg_out_mov(s, TCG_REG_EDX, addr_reg2); tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); #endif - tcg_out8(s, 0xe8); - tcg_out32(s, (tcg_target_long)qemu_ld_helpers[s_bits] - - (tcg_target_long)s->code_ptr - 4); + tcg_out_calli(s, (tcg_target_long)qemu_ld_helpers[s_bits]); switch(opc) { case 0 | 4: @@ -844,6 +850,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, { int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap; #if defined(CONFIG_SOFTMMU) + int stack_adjust; uint8_t *label1_ptr, *label2_ptr; #endif #if TARGET_LONG_BITS == 64 @@ -917,10 +924,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, tcg_out_mov(s, TCG_REG_EDX, data_reg); tcg_out_mov(s, TCG_REG_ECX, data_reg2); tcg_out_pushi(s, mem_index); - tcg_out8(s, 0xe8); - tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - - (tcg_target_long)s->code_ptr - 4); - tcg_out_addi(s, TCG_REG_ESP, 4); + stack_adjust = 4; } else { switch(opc) { case 0: @@ -934,9 +938,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, break; } tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); - tcg_out8(s, 0xe8); - tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - - (tcg_target_long)s->code_ptr - 4); + stack_adjust = 0; } #else if (opc == 3) { @@ -944,10 +946,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, tcg_out_pushi(s, mem_index); tcg_out_push(s, data_reg2); tcg_out_push(s, data_reg); - tcg_out8(s, 0xe8); - tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - - (tcg_target_long)s->code_ptr - 4); - tcg_out_addi(s, TCG_REG_ESP, 12); + stack_adjust = 12; } else { tcg_out_mov(s, TCG_REG_EDX, addr_reg2); switch(opc) { @@ -962,13 +961,19 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, break; } tcg_out_pushi(s, mem_index); - tcg_out8(s, 0xe8); - tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - - (tcg_target_long)s->code_ptr - 4); - tcg_out_addi(s, TCG_REG_ESP, 4); + stack_adjust = 4; } #endif - + + tcg_out_calli(s, (tcg_target_long)qemu_st_helpers[s_bits]); + + if (stack_adjust == 4) { + /* Pop and discard. This is 2 bytes smaller than the add. */ + tcg_out_pop(s, TCG_REG_ECX); + } else if (stack_adjust != 0) { + tcg_out_addi(s, TCG_REG_ESP, stack_adjust); + } + /* jmp label2 */ tcg_out8(s, OPC_JMP_short); label2_ptr = s->code_ptr; @@ -1061,10 +1066,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, break; case INDEX_op_call: if (const_args[0]) { - tcg_out8(s, 0xe8); - tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4); + tcg_out_calli(s, args[0]); } else { - tcg_out_modrm(s, 0xff, 2, args[0]); + /* call *reg */ + tcg_out_modrm(s, 0xff, EXT_CALLN_Ev, args[0]); } break; case INDEX_op_jmp: