From: Russ Cox <rsc@golang.org>
Date: Thu, 14 Feb 2013 02:13:07 +0000 (-0500)
Subject: cmd/8c: disable use of prefetch with GO386=387
X-Git-Tag: go1.1rc2~1047
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=594360cb1b31a99a349ba03294f5459aff0bc33d;p=gostls13.git

cmd/8c: disable use of prefetch with GO386=387

Fixes #4798.

R=ken2
CC=golang-dev
https://golang.org/cl/7323061
---

diff --git a/src/cmd/8c/txt.c b/src/cmd/8c/txt.c
index d7873e3855..1b7617bc52 100644
--- a/src/cmd/8c/txt.c
+++ b/src/cmd/8c/txt.c
@@ -1396,6 +1396,9 @@ gprefetch(Node *n)
 {
 	Node n1;
 	
+	if(strcmp(getgo386(), "sse2") != 0) // assume no prefetch on old machines
+		return;
+
 	regalloc(&n1, n, Z);
 	gmove(n, &n1);
 	n1.op = OINDREG;