From: Rémy Oudompheng <oudomphe@phare.normalesup.org>
Date: Thu, 13 Mar 2014 07:12:38 +0000 (+0100)
Subject: cmd/6g: fix stack zeroing preamble on amd64p32.
X-Git-Tag: go1.3beta1~371
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=741244e4336f7056c733f68d6aef07bc27349e9d;p=gostls13.git

cmd/6g: fix stack zeroing preamble on amd64p32.

It was using a REP STOSQ but putting in CX the number of 32-bit
words to clear.

LGTM=dave
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/75240043
---

diff --git a/src/cmd/6g/ggen.c b/src/cmd/6g/ggen.c
index 8b0c287400..230c0a2ca0 100644
--- a/src/cmd/6g/ggen.c
+++ b/src/cmd/6g/ggen.c
@@ -30,11 +30,11 @@ defframe(Prog *ptxt)
 	// when it looks for pointers.
 	p = ptxt;
 	if(stkzerosize > 0) {
-		p = appendpp(p, AMOVQ, D_CONST, 0, D_AX, 0);	
-		p = appendpp(p, AMOVQ, D_CONST, stkzerosize/widthptr, D_CX, 0);	
-		p = appendpp(p, ALEAQ, D_SP+D_INDIR, frame-stkzerosize, D_DI, 0);	
+		p = appendpp(p, movptr, D_CONST, 0, D_AX, 0);	
+		p = appendpp(p, movptr, D_CONST, stkzerosize/widthptr, D_CX, 0);	
+		p = appendpp(p, leaptr, D_SP+D_INDIR, frame-stkzerosize, D_DI, 0);	
 		p = appendpp(p, AREP, D_NONE, 0, D_NONE, 0);	
-		appendpp(p, ASTOSQ, D_NONE, 0, D_NONE, 0);	
+		appendpp(p, stosptr, D_NONE, 0, D_NONE, 0);	
 	}
 }