gwj / at91sam9263 · Commits

Commit 3c3a1d200c801d35de689325cd32766db5b11f0c

Authored by bellard
1 parent 94d45e44

fixed qemu_st8 insn - prologue saved too many registers 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4418 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 1 changed file with 6 additions and 8 deletions
tcg/x86_64/tcg-target.c
  View file @3c3a1d2
... ... @@ -215,7 +215,7 @@ static inline int tcg_target_const_match(tcg_target_long val,
215 215  
216 216 #define P_EXT 0x100 /* 0x0f opcode prefix */
217 217 #define P_REXW 0x200 /* set rex.w = 1 */
218   -#define P_REX 0x400 /* force rex usage */
  218 +#define P_REXB 0x400 /* force rex use for byte registers */
219 219  
220 220 static const uint8_t tcg_cond_to_jcc[10] = {
221 221 [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)
235 235 int rex;
236 236 rex = ((opc >> 6) & 0x8) | ((r >> 1) & 0x4) |
237 237 ((x >> 2) & 2) | ((rm >> 3) & 1);
238   - if (rex || (opc & P_REX)) {
  238 + if (rex || ((opc & P_REXB) && r >= 4)) {
239 239 tcg_out8(s, rex | 0x40);
240 240 }
241 241 if (opc & P_EXT)
... ... @@ -748,7 +748,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
748 748 switch(opc) {
749 749 case 0:
750 750 /* movzbl */
751   - tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_RSI, data_reg);
  751 + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB, TCG_REG_RSI, data_reg);
752 752 break;
753 753 case 1:
754 754 /* movzwl */
... ... @@ -791,7 +791,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
791 791 switch(opc) {
792 792 case 0:
793 793 /* movb */
794   - tcg_out_modrm_offset(s, 0x88 | P_REX, data_reg, r0, 0);
  794 + tcg_out_modrm_offset(s, 0x88 | P_REXB, data_reg, r0, 0);
795 795 break;
796 796 case 1:
797 797 if (bswap) {
... ... @@ -929,7 +929,7 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
929 929 case INDEX_op_st8_i32:
930 930 case INDEX_op_st8_i64:
931 931 /* movb */
932   - tcg_out_modrm_offset(s, 0x88 | P_REX, args[0], args[1], args[2]);
  932 + tcg_out_modrm_offset(s, 0x88 | P_REXB, args[0], args[1], args[2]);
933 933 break;
934 934 case INDEX_op_st16_i32:
935 935 case INDEX_op_st16_i64:
... ... @@ -1133,8 +1133,6 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
1133 1133 }
1134 1134  
1135 1135 static int tcg_target_callee_save_regs[] = {
1136   - TCG_REG_R10,
1137   - TCG_REG_R11,
1138 1136 TCG_REG_RBP,
1139 1137 TCG_REG_RBX,
1140 1138 TCG_REG_R12,
... ... @@ -1286,6 +1284,6 @@ void tcg_target_init(TCGContext *s)
1286 1284  
1287 1285 tcg_regset_clear(s->reserved_regs);
1288 1286 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RSP);
1289   -
  1287 +
1290 1288 tcg_add_target_add_op_defs(x86_64_op_defs);
1291 1289 }
... ...