runtime: replace XOR AX, AX with MOV $0, AX

R=golang-dev, rsc CC=golang-dev https://golang.org/cl/5985048

runtime: replace XOR AX, AX with MOV $0, AX
R=golang-dev, rsc CC=golang-dev https://golang.org/cl/5985048
fd04f05f · Dmitriy Vyukov · 46675716 · fd04f05f
Commit fd04f05f authored Apr 05, 2012 by Dmitriy Vyukov
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asm_386.s src/pkg/runtime/asm_386.s +1 -1

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--- a/src/pkg/runtime/asm_386.s
+++ b/src/pkg/runtime/asm_386.s
@@ -323,7 +323,7 @@ TEXT runtime·cas64(SB), 7, $0
 cas64_fail:
 	MOVL	AX, 0(SI)
 	MOVL	DX, 4(SI)
-	XORL	AX, AX
+	MOVL	$0, AX
 	RET

 // bool casp(void **p, void *old, void *new)