math/big: bug in AndNot(x,y) for x>0,y<0.
The comment says to use (y-1), but then we did add(y.abs, natOne). We meant sub.
Fixes #9609
Change-Id: I4fe4783326ca082c05588310a0af7895a48fc779
Reviewed-on: https://go-review.googlesource.com/2961
Reviewed-by: Robert Griesemer <gri@golang.org>
diff --git a/src/math/big/int_test.go b/src/math/big/int_test.go
index af3af91..520fcb3 100644
--- a/src/math/big/int_test.go
+++ b/src/math/big/int_test.go
@@ -1216,6 +1216,7 @@
{"-0x01", "-0x01", "-0x01", "-0x01", "0x00", "0x00"},
{"0x07", "0x08", "0x00", "0x0f", "0x0f", "0x07"},
{"0x05", "0x0f", "0x05", "0x0f", "0x0a", "0x00"},
+ {"0xff", "-0x0a", "0xf6", "-0x01", "-0xf7", "0x09"},
{"0x013ff6", "0x9a4e", "0x1a46", "0x01bffe", "0x01a5b8", "0x0125b0"},
{"-0x013ff6", "0x9a4e", "0x800a", "-0x0125b2", "-0x01a5bc", "-0x01c000"},
{"-0x013ff6", "-0x9a4e", "-0x01bffe", "-0x1a46", "0x01a5b8", "0x8008"},
