From patchwork Sat Oct 6 12:30:20 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [13/14] i386: optimize setbe From: Paolo Bonzini X-Patchwork-Id: 189696 Message-Id: <1349526621-13939-14-git-send-email-pbonzini@redhat.com> To: qemu-devel@nongnu.org Date: Sat, 6 Oct 2012 14:30:20 +0200 This is looking at EFLAGS, but it can do so more efficiently with setcond. Signed-off-by: Paolo Bonzini Reviewed-by: Blue Swirl Reviewed-by: Richard Henderson --- target-i386/translate.c | 7 +++---- 1 file modificato, 3 inserzioni(+), 4 rimozioni(-) diff --git a/target-i386/translate.c b/target-i386/translate.c index fb44839..342b9ec 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -1031,10 +1031,9 @@ static inline void gen_setcc_slow(DisasContext *s, int jcc_op, TCGv reg, bool in return; 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, 0x41); + 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); return;