From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Tue, 21 Apr 2015 22:43:44 +0000 (-0700)
Subject: math/big: test that subVW and addVW work with arbitrary y
X-Git-Tag: go1.5beta1~971
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=91f2db3c574887c47da795b06d9f8564d558f85a;p=gostls13.git

math/big: test that subVW and addVW work with arbitrary y

Fixes #10525.

Change-Id: I92dc87f5d6db396d8dde2220fc37b7093b772d81
Reviewed-on: https://go-review.googlesource.com/9210
Reviewed-by: Robert Griesemer <gri@golang.org>
---

diff --git a/src/math/big/arith.go b/src/math/big/arith.go
index 328c85c4f7..1ff6349d9d 100644
--- a/src/math/big/arith.go
+++ b/src/math/big/arith.go
@@ -196,7 +196,6 @@ func subVV_g(z, x, y []Word) (c Word) {
 	return
 }
 
-// Argument y must be either 0 or 1.
 // The resulting carry c is either 0 or 1.
 func addVW_g(z, x []Word, y Word) (c Word) {
 	if use_addWW_g {
diff --git a/src/math/big/arith_test.go b/src/math/big/arith_test.go
index cd92dd7173..f46a494f17 100644
--- a/src/math/big/arith_test.go
+++ b/src/math/big/arith_test.go
@@ -155,6 +155,7 @@ var sumVW = []argVW{
 	{nat{1}, nat{1}, 0, 0},
 	{nat{0}, nat{_M}, 1, 1},
 	{nat{0, 0, 0, 0}, nat{_M, _M, _M, _M}, 1, 1},
+	{nat{585}, nat{314}, 271, 0},
 }
 
 var prodVW = []argVW{