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[Qemu-devel] [PATCH 26/57] target-i386: optimize setle
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 26/57] target-i386: optimize setle |
Date: |
Wed, 23 Jan 2013 20:03:10 -0800 |
And allow gen_setcc_slow to operate on cpu_cc_src.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target-i386/translate.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index 2cf668b..44cdf62 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -1040,7 +1040,6 @@ static void gen_compute_eflags_z(DisasContext *s, TCGv
reg, bool inv)
static void gen_setcc_slow(DisasContext *s, int jcc_op, TCGv reg, bool inv)
{
- assert(!TCGV_EQUAL(reg, cpu_cc_src));
switch(jcc_op) {
case JCC_O:
gen_compute_eflags_o(s, reg);
@@ -1067,20 +1066,18 @@ static void gen_setcc_slow(DisasContext *s, int jcc_op,
TCGv reg, bool inv)
break;
case JCC_L:
gen_compute_eflags(s);
- tcg_gen_shri_tl(reg, cpu_cc_src, 11); /* CC_O */
- tcg_gen_shri_tl(cpu_tmp0, cpu_cc_src, 7); /* CC_S */
+ tcg_gen_shri_tl(cpu_tmp0, cpu_cc_src, 11); /* CC_O */
+ tcg_gen_shri_tl(reg, cpu_cc_src, 7); /* CC_S */
tcg_gen_xor_tl(reg, reg, cpu_tmp0);
tcg_gen_andi_tl(reg, reg, 1);
break;
default:
case JCC_LE:
gen_compute_eflags(s);
- tcg_gen_shri_tl(reg, cpu_cc_src, 11); /* CC_O */
- tcg_gen_shri_tl(cpu_tmp4, cpu_cc_src, 7); /* CC_S */
- tcg_gen_shri_tl(cpu_tmp0, cpu_cc_src, 6); /* CC_Z */
- tcg_gen_xor_tl(reg, reg, cpu_tmp4);
- tcg_gen_or_tl(reg, reg, cpu_tmp0);
- tcg_gen_andi_tl(reg, reg, 1);
+ tcg_gen_shri_tl(cpu_tmp0, cpu_cc_src, 4); /* CC_O -> CC_S */
+ tcg_gen_xor_tl(reg, cpu_tmp0, cpu_cc_src);
+ tcg_gen_andi_tl(reg, reg, CC_S | CC_Z);
+ tcg_gen_setcondi_tl(inv ? TCG_COND_EQ : TCG_COND_NE, reg, reg, 0);
break;
}
if (inv) {
--
1.7.11.7
- [Qemu-devel] [PATCH 51/57] target-i386: Implement PDEP, PEXT, (continued)
- [Qemu-devel] [PATCH 51/57] target-i386: Implement PDEP, PEXT, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 38/57] target-i386: Update cc_op before TCG branches, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 50/57] target-i386: Implement MULX, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 45/57] target-i386: Implement MOVBE, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 32/57] target-i386: cleanup temporary macros for CCPrepare, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 34/57] target-i386: expand cmov via movcond, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 37/57] target-i386: introduce gen_jcc1_noeob, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 52/57] target-i386: Implement SHLX, SARX, SHRX, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 20/57] target-i386: Move CC discards to set_cc_op, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 21/57] target-i386: do not call helper to compute ZF/SF, Richard Henderson, 2013/01/23
- [Qemu-devel] [PATCH 26/57] target-i386: optimize setle,
Richard Henderson <=
- [Qemu-devel] [PATCH 22/57] target-i386: use inverted setcond when computing NS or NZ, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 24/57] target-i386: change gen_setcc_slow_T0 to gen_setcc_slow, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 29/57] target-i386: introduce gen_prepare_cc, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 27/57] target-i386: optimize setcc instructions, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 47/57] target-i386: Implement BEXTR, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 41/57] target-i386: Don't reference ENV through most of cc helpers, Richard Henderson, 2013/01/24
- [Qemu-devel] [PATCH 19/57] target-i386: no need to flush out cc_op before gen_eob, Richard Henderson, 2013/01/24
- Re: [Qemu-devel] [PATCH 00/57] target-i386 eflags cleanup and bmi/adx extensions, Andreas Färber, 2013/01/24