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authorRichard Henderson <rth@twiddle.net>2013-11-12 11:16:56 +1000
committerAnthony Liguori <aliguori@amazon.com>2013-11-21 08:01:16 -0800
commit7865eec4f5fb10224a2cd391a8476044cbe5a1f7 (patch)
tree07c785978022821174d41b139574ef22f7580117
parent33effd3aab4a268fb573fd8d7e0fe0baed0cd61a (diff)
downloadqemu-arm-7865eec4f5fb10224a2cd391a8476044cbe5a1f7.tar.gz
target-i386: Fix addr32 prefix in gen_lea_modrm
Fix the following run-test-x86_64 testsuite failures: -lea (%%eax) = 0000000000000001 -lea (%%ebx) = 0000000000000002 -lea (%%ecx) = 0000000000000004 -lea (%%edx) = 0000000000000008 -lea (%%esi) = 0000000000000010 -lea (%%edi) = 0000000000000020 +lea (%%eax) = 0000abcc00000001 +lea (%%ebx) = 0000abcf00000002 +lea (%%ecx) = 0000abc900000004 +lea (%%edx) = 0000abc500000008 +lea (%%esi) = 0000abdd00000010 +lea (%%edi) = 0000abed00000020 In addition, reduce ifdeffery and minimize the number of TCG ops produced during address computation. Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1384219016-5170-1-git-send-email-rth@twiddle.net Signed-off-by: Anthony Liguori <aliguori@amazon.com>
-rw-r--r--target-i386/translate.c92
1 files changed, 47 insertions, 45 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c
index ecf16b389b..7916e5b1f6 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -2090,6 +2090,7 @@ static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
int scale;
int opreg;
int mod, rm, code, override, must_add_seg;
+ TCGv sum;
override = s->override;
must_add_seg = s->addseg;
@@ -2099,10 +2100,9 @@ static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
rm = modrm & 7;
if (s->aflag) {
-
havesib = 0;
base = rm;
- index = 0;
+ index = -1;
scale = 0;
if (base == 4) {
@@ -2110,6 +2110,9 @@ static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
code = cpu_ldub_code(env, s->pc++);
scale = (code >> 6) & 3;
index = ((code >> 3) & 7) | REX_X(s);
+ if (index == 4) {
+ index = -1; /* no index */
+ }
base = (code & 7);
}
base |= REX_B(s);
@@ -2137,59 +2140,57 @@ static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
break;
}
- if (base >= 0) {
- /* for correct popl handling with esp */
- if (base == 4 && s->popl_esp_hack)
- disp += s->popl_esp_hack;
-#ifdef TARGET_X86_64
- if (s->aflag == 2) {
- gen_op_movq_A0_reg(base);
- if (disp != 0) {
- gen_op_addq_A0_im(disp);
- }
- } else
-#endif
- {
- gen_op_movl_A0_reg(base);
- if (disp != 0)
- gen_op_addl_A0_im(disp);
+ /* For correct popl handling with esp. */
+ if (base == R_ESP && s->popl_esp_hack) {
+ disp += s->popl_esp_hack;
+ }
+
+ /* Compute the address, with a minimum number of TCG ops. */
+ TCGV_UNUSED(sum);
+ if (index >= 0) {
+ if (scale == 0) {
+ sum = cpu_regs[index];
+ } else {
+ tcg_gen_shli_tl(cpu_A0, cpu_regs[index], scale);
+ sum = cpu_A0;
}
- } else {
-#ifdef TARGET_X86_64
- if (s->aflag == 2) {
- gen_op_movq_A0_im(disp);
- } else
-#endif
- {
- gen_op_movl_A0_im(disp);
+ if (base >= 0) {
+ tcg_gen_add_tl(cpu_A0, sum, cpu_regs[base]);
+ sum = cpu_A0;
}
+ } else if (base >= 0) {
+ sum = cpu_regs[base];
}
- /* index == 4 means no index */
- if (havesib && (index != 4)) {
-#ifdef TARGET_X86_64
- if (s->aflag == 2) {
- gen_op_addq_A0_reg_sN(scale, index);
- } else
-#endif
- {
- gen_op_addl_A0_reg_sN(scale, index);
- }
+ if (TCGV_IS_UNUSED(sum)) {
+ tcg_gen_movi_tl(cpu_A0, disp);
+ } else {
+ tcg_gen_addi_tl(cpu_A0, sum, disp);
}
+
if (must_add_seg) {
if (override < 0) {
- if (base == R_EBP || base == R_ESP)
+ if (base == R_EBP || base == R_ESP) {
override = R_SS;
- else
+ } else {
override = R_DS;
+ }
}
-#ifdef TARGET_X86_64
- if (s->aflag == 2) {
- gen_op_addq_A0_seg(override);
- } else
-#endif
- {
- gen_op_addl_A0_seg(s, override);
+
+ tcg_gen_ld_tl(cpu_tmp0, cpu_env,
+ offsetof(CPUX86State, segs[override].base));
+ if (CODE64(s)) {
+ if (s->aflag != 2) {
+ tcg_gen_ext32u_tl(cpu_A0, cpu_A0);
+ }
+ tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
+ goto done;
}
+
+ tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
+ }
+
+ if (s->aflag != 2) {
+ tcg_gen_ext32u_tl(cpu_A0, cpu_A0);
}
} else {
switch (mod) {
@@ -2259,6 +2260,7 @@ static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
}
}
+ done:
opreg = OR_A0;
disp = 0;
*reg_ptr = opreg;