From patchwork Wed Apr 14 18:02:32 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 51206 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 B97ECB7D54 for ; Thu, 29 Apr 2010 05:21:05 +1000 (EST) Received: from localhost ([127.0.0.1]:48414 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O7Cog-0005cL-Od for incoming@patchwork.ozlabs.org; Wed, 28 Apr 2010 15:21:02 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1O7C1p-0000Oa-D5 for qemu-devel@nongnu.org; Wed, 28 Apr 2010 14:30:33 -0400 Received: from [140.186.70.92] (port=46683 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O7C1Z-0000HO-Vf for qemu-devel@nongnu.org; Wed, 28 Apr 2010 14:30:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1O7C1R-0004Rv-RO for qemu-devel@nongnu.org; Wed, 28 Apr 2010 14:30:17 -0400 Received: from are.twiddle.net ([75.149.56.221]:36489) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O7C1R-0004Qt-F8 for qemu-devel@nongnu.org; Wed, 28 Apr 2010 14:30:09 -0400 Received: by are.twiddle.net (Postfix, from userid 5000) id 550AE1072; Wed, 28 Apr 2010 11:30:06 -0700 (PDT) Message-Id: <2a9043d9d022d3e8cfcd819f82a6ee29f3c75260.1272479073.git.rth@twiddle.net> In-Reply-To: References: From: Richard Henderson Date: Wed, 14 Apr 2010 11:02:32 -0700 To: qemu-devel@nongnu.org X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Cc: aurelien@aurel32.net Subject: [Qemu-devel] [PATCH 14/22] 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 Acked-by: Aurelien Jarno --- 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 58fcd23..e82788d 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -167,6 +167,7 @@ static inline int tcg_target_const_match(tcg_target_long val, #define OPC_ARITH_EvIb (0x83) #define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ #define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) +#define OPC_CALL_Jz (0xe8) #define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) #define OPC_DEC_r32 (0x48) #define OPC_BSWAP (0xc8 | P_EXT) @@ -210,6 +211,7 @@ 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}. */ @@ -644,6 +646,12 @@ 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" @@ -748,9 +756,7 @@ 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: @@ -865,6 +871,7 @@ 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 @@ -938,10 +945,7 @@ 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: @@ -955,9 +959,7 @@ 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) { @@ -965,10 +967,7 @@ 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) { @@ -983,13 +982,19 @@ 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; @@ -1082,10 +1087,10 @@ 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: