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fixed qemu_st8 insn - prologue saved too many registers

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4418 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2008-05-10 21:42:05 +00:00
parent 94d45e4480
commit 3c3a1d200c
1 changed files with 6 additions and 8 deletions
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14
tcg/x86_64/tcg-target.c
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@ -215,7 +215,7 @@ static inline int tcg_target_const_match(tcg_target_long val,
#define P_EXT 0x100 /* 0x0f opcode prefix */
#define P_REXW 0x200 /* set rex.w = 1 */
#define P_REX 0x400 /* force rex usage */
#define P_REXB 0x400 /* force rex use for byte registers */
static const uint8_t tcg_cond_to_jcc[10] = {
[TCG_COND_EQ] = JCC_JE,
@ -235,7 +235,7 @@ static inline void tcg_out_opc(TCGContext *s, int opc, int r, int rm, int x)
int rex;
rex = ((opc >> 6) & 0x8) | ((r >> 1) & 0x4) |
((x >> 2) & 2) | ((rm >> 3) & 1);
if (rex || (opc & P_REX)) {
if (rex || ((opc & P_REXB) && r >= 4)) {
tcg_out8(s, rex | 0x40);
}
if (opc & P_EXT)
@ -748,7 +748,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
switch(opc) {
case 0:
/* movzbl */
tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_RSI, data_reg);
tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB, TCG_REG_RSI, data_reg);
break;
case 1:
/* movzwl */
@ -791,7 +791,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
switch(opc) {
case 0:
/* movb */
tcg_out_modrm_offset(s, 0x88 | P_REX, data_reg, r0, 0);
tcg_out_modrm_offset(s, 0x88 | P_REXB, data_reg, r0, 0);
break;
case 1:
if (bswap) {
@ -929,7 +929,7 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
case INDEX_op_st8_i32:
case INDEX_op_st8_i64:
/* movb */
tcg_out_modrm_offset(s, 0x88 | P_REX, args[0], args[1], args[2]);
tcg_out_modrm_offset(s, 0x88 | P_REXB, args[0], args[1], args[2]);
break;
case INDEX_op_st16_i32:
case INDEX_op_st16_i64:
@ -1133,8 +1133,6 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
}
static int tcg_target_callee_save_regs[] = {
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_RBP,
TCG_REG_RBX,
TCG_REG_R12,
@ -1286,6 +1284,6 @@ void tcg_target_init(TCGContext *s)
tcg_regset_clear(s->reserved_regs);
tcg_regset_set_reg(s->reserved_regs, TCG_REG_RSP);
tcg_add_target_add_op_defs(x86_64_op_defs);
}