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| author | Richard Henderson <rth@twiddle.net> | 2013-01-23 13:49:43 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-02-18 15:03:57 -0800 |
| commit | 2cb4764577f270eec259123955a6396ad6a2f161 (patch) | |
| tree | 382cf18ddb97ed8ec87699ce1ea3f1a1c96401d6 | |
| parent | 1a5c635947e60167c4626dd274531b8b0eacc2e5 (diff) | |
| download | qemu-2cb4764577f270eec259123955a6396ad6a2f161.zip qemu-2cb4764577f270eec259123955a6396ad6a2f161.tar.gz qemu-2cb4764577f270eec259123955a6396ad6a2f161.tar.bz2 | |
target-i386: optimize setbe
This is looking at EFLAGS, but it can do so more efficiently with
setcond.
Reviewed-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | target-i386/translate.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index c510732..dab6983 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -1060,10 +1060,9 @@ static void gen_setcc_slow(DisasContext *s, int jcc_op, TCGv reg, bool inv) break; case JCC_BE: gen_compute_eflags(s); - tcg_gen_shri_tl(reg, cpu_cc_src, 6); - tcg_gen_or_tl(reg, reg, cpu_cc_src); - tcg_gen_andi_tl(reg, reg, 1); - break; + tcg_gen_andi_tl(reg, cpu_cc_src, CC_Z | CC_C); + tcg_gen_setcondi_tl(inv ? TCG_COND_EQ : TCG_COND_NE, reg, reg, 0); + return; case JCC_S: gen_compute_eflags_s(s, reg, inv); inv = false; |