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| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 6 | ||||
| -rw-r--r-- | manual/arith.texi | 8 |
3 files changed, 11 insertions, 9 deletions
@@ -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] @@ -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 index c5795c2ed8..e160438938 100644 --- 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: |