From: Mike Pall <mike>
Date: Wed, 22 Jun 2011 15:55:43 +0000 (+0200)
Subject: x86/x64: Fix fusion of comparisons with u8/u16 XLOAD.
X-Git-Tag: v2.0.0-beta8~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2246db688382ed69e5929f1e698b545e58b5035;p=thirdparty%2FLuaJIT.git

x86/x64: Fix fusion of comparisons with u8/u16 XLOAD.
---

diff --git a/src/lj_asm_x86.h b/src/lj_asm_x86.h
index e5bc4a0e..ba28792d 100644
--- a/src/lj_asm_x86.h
+++ b/src/lj_asm_x86.h
@@ -2037,6 +2037,8 @@ static void asm_comp(ASMState *as, IRIns *ir, uint32_t cc)
 	  left = asm_fuseload(as, lref, RSET_GPR);
 	  irl->t = origt;
 	  if (left == RID_MRM) {  /* Fusion succeeded? */
+	    if (irt_isu8(irl->t) || irt_isu16(irl->t))
+	      cc >>= 4;  /* Need unsigned compare. */
 	    asm_guardcc(as, cc);
 	    emit_i8(as, imm);
 	    emit_mrm(as, (irt_isi8(origt) || irt_isu8(origt)) ?