From 8a39ee361feb9bf46d728ff1ba4f07ca1d9610b1 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <stapelberg@debian.org>
Date: Thu, 19 Jun 2014 09:22:53 +0200
Subject: Imported Upstream version 1.3

---
 src/cmd/gc/mparith2.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/cmd/gc/mparith2.c')

diff --git a/src/cmd/gc/mparith2.c b/src/cmd/gc/mparith2.c
index 9b2f664f7..5cf98c62c 100644
--- a/src/cmd/gc/mparith2.c
+++ b/src/cmd/gc/mparith2.c
@@ -300,13 +300,21 @@ mpmulfixfix(Mpint *a, Mpint *b)
 	for(i=0; i<na; i++) {
 		x = *a1++;
 		for(j=0; j<Mpscale; j++) {
-			if(x & 1)
+			if(x & 1) {
+				if(s.ovf) {
+					q.ovf = 1;
+					goto out;
+				}
 				mpaddfixfix(&q, &s, 1);
+				if(q.ovf)
+					goto out;
+			}
 			mplsh(&s, 1);
 			x >>= 1;
 		}
 	}
 
+out:
 	q.neg = a->neg ^ b->neg;
 	mpmovefixfix(a, &q);
 	if(a->ovf)
-- 
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