Reviewers: Sven Panne,
Description:
Force signed zero double.
[email protected]
BUG=v8:2239
TEST=
Please review this at https://chromiumcodereview.appspot.com/10821088/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/conversions.h
Index: src/conversions.h
diff --git a/src/conversions.h b/src/conversions.h
index
e12cf5cdfc785b5b3b96e051a3b2799a7497bfed..f612b4b391a3eb1a65d059f9b83ea03a18bdc663
100644
--- a/src/conversions.h
+++ b/src/conversions.h
@@ -53,7 +53,10 @@ inline bool isDigit(int x, int radix) {
inline double SignedZero(bool negative) {
- return negative ? -0.0 : 0.0;
+ // -0.0 according to IEEE 754 only has the (uppermost) sign bit set.
+ static const uint64_t kSignedZeroInt64 = static_cast<uint64_t>(1) << 63;
+ static const double kSignedZero = BitCast<double,
uint64_t>(kSignedZeroInt64);
+ return negative ? kSignedZero : 0.0;
}
--
v8-dev mailing list
[email protected]
http://groups.google.com/group/v8-dev
