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Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/translate.c103
1 files changed, 37 insertions, 66 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c
index 6fcd0f6e20..89f290822b 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -834,55 +834,63 @@ static void gen_op_update_neg_cc(void)
}
/* compute eflags.C to reg */
-static void gen_compute_eflags_c(TCGv reg)
+static void gen_compute_eflags_c(DisasContext *s, TCGv reg)
{
+ if (s->cc_op != CC_OP_DYNAMIC) {
+ gen_op_set_cc_op(s->cc_op);
+ }
gen_helper_cc_compute_c(cpu_tmp2_i32, cpu_env, cpu_cc_op);
tcg_gen_extu_i32_tl(reg, cpu_tmp2_i32);
}
-/* compute all eflags to cc_src */
-static void gen_compute_eflags(TCGv reg)
+/* compute all eflags to reg */
+static void gen_compute_eflags(DisasContext *s, TCGv reg)
{
+ if (s->cc_op != CC_OP_DYNAMIC) {
+ gen_op_set_cc_op(s->cc_op);
+ }
gen_helper_cc_compute_all(cpu_tmp2_i32, cpu_env, cpu_cc_op);
+ if (TCGV_EQUAL(reg, cpu_cc_src)) {
+ tcg_gen_discard_tl(cpu_cc_dst);
+ s->cc_op = CC_OP_EFLAGS;
+ }
tcg_gen_extu_i32_tl(reg, cpu_tmp2_i32);
}
static inline void gen_setcc_slow_T0(DisasContext *s, int jcc_op)
{
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
switch(jcc_op) {
case JCC_O:
- gen_compute_eflags(cpu_T[0]);
+ gen_compute_eflags(s, cpu_T[0]);
tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 11);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1);
break;
case JCC_B:
- gen_compute_eflags_c(cpu_T[0]);
+ gen_compute_eflags_c(s, cpu_T[0]);
break;
case JCC_Z:
- gen_compute_eflags(cpu_T[0]);
+ gen_compute_eflags(s, cpu_T[0]);
tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 6);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1);
break;
case JCC_BE:
- gen_compute_eflags(cpu_tmp0);
+ gen_compute_eflags(s, cpu_tmp0);
tcg_gen_shri_tl(cpu_T[0], cpu_tmp0, 6);
tcg_gen_or_tl(cpu_T[0], cpu_T[0], cpu_tmp0);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1);
break;
case JCC_S:
- gen_compute_eflags(cpu_T[0]);
+ gen_compute_eflags(s, cpu_T[0]);
tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 7);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1);
break;
case JCC_P:
- gen_compute_eflags(cpu_T[0]);
+ gen_compute_eflags(s, cpu_T[0]);
tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 2);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 1);
break;
case JCC_L:
- gen_compute_eflags(cpu_tmp0);
+ gen_compute_eflags(s, cpu_tmp0);
tcg_gen_shri_tl(cpu_T[0], cpu_tmp0, 11); /* CC_O */
tcg_gen_shri_tl(cpu_tmp0, cpu_tmp0, 7); /* CC_S */
tcg_gen_xor_tl(cpu_T[0], cpu_T[0], cpu_tmp0);
@@ -890,7 +898,7 @@ static inline void gen_setcc_slow_T0(DisasContext *s, int jcc_op)
break;
default:
case JCC_LE:
- gen_compute_eflags(cpu_tmp0);
+ gen_compute_eflags(s, cpu_tmp0);
tcg_gen_shri_tl(cpu_T[0], cpu_tmp0, 11); /* CC_O */
tcg_gen_shri_tl(cpu_tmp4, cpu_tmp0, 7); /* CC_S */
tcg_gen_shri_tl(cpu_tmp0, cpu_tmp0, 6); /* CC_Z */
@@ -1278,9 +1286,7 @@ static void gen_op(DisasContext *s1, int op, int ot, int d)
}
switch(op) {
case OP_ADCL:
- if (s1->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s1->cc_op);
- gen_compute_eflags_c(cpu_tmp4);
+ gen_compute_eflags_c(s1, cpu_tmp4);
tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_tmp4);
if (d != OR_TMP0)
@@ -1295,9 +1301,7 @@ static void gen_op(DisasContext *s1, int op, int ot, int d)
s1->cc_op = CC_OP_DYNAMIC;
break;
case OP_SBBL:
- if (s1->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s1->cc_op);
- gen_compute_eflags_c(cpu_tmp4);
+ gen_compute_eflags_c(s1, cpu_tmp4);
tcg_gen_sub_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
tcg_gen_sub_tl(cpu_T[0], cpu_T[0], cpu_tmp4);
if (d != OR_TMP0)
@@ -1371,9 +1375,7 @@ static void gen_inc(DisasContext *s1, int ot, int d, int c)
gen_op_mov_TN_reg(ot, 0, d);
else
gen_op_ld_T0_A0(ot + s1->mem_index);
- if (s1->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s1->cc_op);
- gen_compute_eflags_c(cpu_cc_src);
+ gen_compute_eflags_c(s1, cpu_cc_src);
if (c > 0) {
tcg_gen_addi_tl(cpu_T[0], cpu_T[0], 1);
s1->cc_op = CC_OP_INCB + ot;
@@ -1598,11 +1600,8 @@ static void gen_rot_rm_T1(DisasContext *s, int ot, int op1,
}
/* update eflags. It is needed anyway most of the time, do it always. */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
- tcg_gen_discard_tl(cpu_cc_dst);
- s->cc_op = CC_OP_EFLAGS;
+ gen_compute_eflags(s, cpu_cc_src);
+ assert(s->cc_op == CC_OP_EFLAGS);
label2 = gen_new_label();
tcg_gen_brcondi_tl(TCG_COND_EQ, t1, 0, label2);
@@ -1678,12 +1677,8 @@ static void gen_rot_rm_im(DisasContext *s, int ot, int op1, int op2,
if (op2 != 0) {
/* update eflags */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
-
- gen_compute_eflags(cpu_cc_src);
- tcg_gen_discard_tl(cpu_cc_dst);
- s->cc_op = CC_OP_EFLAGS;
+ gen_compute_eflags(s, cpu_cc_src);
+ assert(s->cc_op == CC_OP_EFLAGS);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~(CC_O | CC_C));
tcg_gen_xor_tl(cpu_tmp0, t1, t0);
@@ -1708,9 +1703,8 @@ static void gen_rotc_rm_T1(DisasContext *s, int ot, int op1,
{
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
- tcg_gen_discard_tl(cpu_cc_dst);
- s->cc_op = CC_OP_EFLAGS;
+ gen_compute_eflags(s, cpu_cc_src);
+ assert(s->cc_op == CC_OP_EFLAGS);
/* load */
if (op1 == OR_TMP0)
@@ -6499,12 +6493,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM))
goto illegal_op;
gen_op_mov_TN_reg(OT_BYTE, 0, R_AH);
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
- tcg_gen_discard_tl(cpu_cc_dst);
- s->cc_op = CC_OP_EFLAGS;
-
+ gen_compute_eflags(s, cpu_cc_src);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, CC_O);
tcg_gen_andi_tl(cpu_T[0], cpu_T[0], CC_S | CC_Z | CC_A | CC_P | CC_C);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_T[0]);
@@ -6512,33 +6501,22 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
case 0x9f: /* lahf */
if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM))
goto illegal_op;
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_T[0]);
+ gen_compute_eflags(s, cpu_T[0]);
/* Note: gen_compute_eflags() only gives the condition codes */
tcg_gen_ori_tl(cpu_T[0], cpu_T[0], 0x02);
gen_op_mov_reg_T0(OT_BYTE, R_AH);
break;
case 0xf5: /* cmc */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
+ gen_compute_eflags(s, cpu_cc_src);
tcg_gen_xori_tl(cpu_cc_src, cpu_cc_src, CC_C);
- s->cc_op = CC_OP_EFLAGS;
break;
case 0xf8: /* clc */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
+ gen_compute_eflags(s, cpu_cc_src);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~CC_C);
- s->cc_op = CC_OP_EFLAGS;
break;
case 0xf9: /* stc */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
+ gen_compute_eflags(s, cpu_cc_src);
tcg_gen_ori_tl(cpu_cc_src, cpu_cc_src, CC_C);
- s->cc_op = CC_OP_EFLAGS;
break;
case 0xfc: /* cld */
tcg_gen_movi_i32(cpu_tmp2_i32, 1);
@@ -6866,9 +6844,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
case 0xd6: /* salc */
if (CODE64(s))
goto illegal_op;
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags_c(cpu_T[0]);
+ gen_compute_eflags_c(s, cpu_T[0]);
tcg_gen_neg_tl(cpu_T[0], cpu_T[0]);
gen_op_mov_reg_T0(OT_BYTE, R_EAX);
break;
@@ -6892,8 +6868,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
switch(b) {
case 0: /* loopnz */
case 1: /* loopz */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
gen_op_add_reg_im(s->aflag, R_ECX, -1);
gen_op_jz_ecx(s->aflag, l3);
gen_jcc1(s, (JCC_Z << 1) | (b ^ 1), l1);
@@ -7432,12 +7406,9 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
} else {
gen_op_mov_reg_v(ot, rm, t0);
}
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_compute_eflags(cpu_cc_src);
+ gen_compute_eflags(s, cpu_cc_src);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~CC_Z);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, t2);
- s->cc_op = CC_OP_EFLAGS;
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(t2);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-14 23:27:27 +0000