From: Fabrice Bellard <fabrice@bellard.org>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [4583] jump simplification
Date: Sun, 25 May 2008 18:49:07 +0000 [thread overview]
Message-ID: <E1K0LHH-0002fJ-BM@cvs.savannah.gnu.org> (raw)
Revision: 4583
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4583
Author: bellard
Date: 2008-05-25 18:49:06 +0000 (Sun, 25 May 2008)
Log Message:
-----------
jump simplification
Modified Paths:
--------------
trunk/tcg/x86_64/tcg-target.c
Modified: trunk/tcg/x86_64/tcg-target.c
===================================================================
--- trunk/tcg/x86_64/tcg-target.c 2008-05-25 18:41:58 UTC (rev 4582)
+++ trunk/tcg/x86_64/tcg-target.c 2008-05-25 18:49:06 UTC (rev 4583)
@@ -450,41 +450,20 @@
TCGArg arg1, TCGArg arg2, int const_arg2,
int label_index, int rexw)
{
- int c;
if (const_arg2) {
if (arg2 == 0) {
- /* use test */
- switch(cond) {
- case TCG_COND_EQ:
- c = JCC_JE;
- break;
- case TCG_COND_NE:
- c = JCC_JNE;
- break;
- case TCG_COND_LT:
- c = JCC_JS;
- break;
- case TCG_COND_GE:
- c = JCC_JNS;
- break;
- default:
- goto do_cmpi;
- }
/* test r, r */
tcg_out_modrm(s, 0x85 | rexw, arg1, arg1);
- tcg_out_jxx(s, c, label_index);
} else {
- do_cmpi:
if (rexw)
tgen_arithi64(s, ARITH_CMP, arg1, arg2);
else
tgen_arithi32(s, ARITH_CMP, arg1, arg2);
- tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
}
} else {
tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3) | rexw, arg2, arg1);
- tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
}
+ tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
}
#if defined(CONFIG_SOFTMMU)
reply other threads:[~2008-05-25 18:49 UTC|newest]
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