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tcg-i386: Tidy xchg. 

Define and use OPC_XCHG_ax_r32.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-05-21 08:30:32 -07:00 committed by Aurelien Jarno
parent 0566d38737
commit b3e66df71a
1 changed files with 3 additions and 1 deletions
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4
tcg/i386/tcg-target.c
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@ -192,6 +192,7 @@ static inline int tcg_target_const_match(tcg_target_long val,
#define OPC_SHIFT_Ib (0xc1)
#define OPC_SHIFT_cl (0xd3)
#define OPC_TESTL (0x85)
#define OPC_XCHG_ax_r32 (0x90)
#define OPC_GRP3_Ev (0xf7)
#define OPC_GRP5 (0xff)
@ -770,7 +771,8 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
break;
case 3:
if (data_reg == TCG_REG_EDX) {
tcg_out_opc(s, 0x90 + TCG_REG_EDX); /* xchg %edx, %eax */
/* xchg %edx, %eax */
tcg_out_opc(s, OPC_XCHG_ax_r32 + TCG_REG_EDX);
tcg_out_mov(s, data_reg2, TCG_REG_EAX);
} else {
tcg_out_mov(s, data_reg, TCG_REG_EAX);