Remove erroneous statements about negative zero.

git-mirror · Feb 19, 2012 · cd837b0 · cd837b0
1 parent 02c4bba
commit cd837b0
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,9 @@
+2012-02-19  Nick Bowler  <nbowler@draconx.ca>
+
+	[BZ #11322]
+	* manual/arith.texi: Remove statements about negative zero
+	behaving identically to zero.
+
 2012-02-18  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #5993]

diff --git a/NEWS b/NEWS
@@ -10,9 +10,9 @@ Version 2.16
 * The following bugs are resolved with this release:
 
   174, 350, 411, 3335, 4026, 4596, 4822, 5077, 5805, 5993, 6884, 6907, 9902,
-  10140, 10210, 11494, 12047, 13058, 13525, 13526, 13527, 13528, 13529,
-  13530, 13531, 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13559,
-  13583, 13618
+  10140, 10210, 11322, 11494, 12047, 13058, 13525, 13526, 13527, 13528,
+  13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552, 13553, 13555,
+  13559, 13583, 13618
 
 * ISO C11 support:
 

diff --git a/manual/arith.texi b/manual/arith.texi
@@ -657,9 +657,7 @@ such as by defining @code{_GNU_SOURCE}, and then you must include
 @w{IEEE 754} also allows for another unusual value: negative zero.  This
 value is produced when you divide a positive number by negative
 infinity, or when a negative result is smaller than the limits of
-representation.  Negative zero behaves identically to zero in all
-calculations, unless you explicitly test the sign bit with
-@code{signbit} or @code{copysign}.
+representation.
 
 @node Status bit operations
 @subsection Examining the FPU status word
@@ -926,9 +924,7 @@ If a result is too small to be represented as a denormalized number, it
 is rounded to zero.  However, the sign of the result is preserved; if
 the calculation was negative, the result is @dfn{negative zero}.
 Negative zero can also result from some operations on infinity, such as
-@math{4/-@infinity{}}.  Negative zero behaves identically to zero except
-when the @code{copysign} or @code{signbit} functions are used to check
-the sign bit directly.
+@math{4/-@infinity{}}.
 
 At any time one of the above four rounding modes is selected.  You can
 find out which one with this function: