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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2015-09-18 16:30:43 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2015-09-18 16:34:45 +0100 |
| commit | 8df4e219e43a4a257d0759b54fef8c488e2f282e (patch) | |
| tree | fd17e1976bc8fb5443476300f9bcf9645de920a9 /NEWS | |
| parent | cb2f668d4692df8d31b2ccf9b18b86bebe2d9174 (diff) | |
| download | glibc-8df4e219e43a4a257d0759b54fef8c488e2f282e.tar.gz glibc-8df4e219e43a4a257d0759b54fef8c488e2f282e.tar.xz glibc-8df4e219e43a4a257d0759b54fef8c488e2f282e.zip | |
Add inlining of the C99 math functions isinf/isnan/signbit/isfinite/isnormal/fpclassify using GCC
built-ins when available. Since going through the PLT is expensive for these small functions,
inlining results in major speedups (about 7x on Cortex-A57 for isinf). The GCC built-ins are not
correct if signalling NaN support is required, and thus are turned off in that case (see GCC bug
66462). The test-snan.c tests sNaNs and so must be explicitly built with -fsignaling-nans.
2015-09-18 Wilco Dijkstra <wdijkstr@arm.com>
[BZ #15367]
[BZ #17441]
* math/Makefile: Build test-snan.c with -fsignaling-nans.
* math/math.h (fpclassify): Use __builtin_fpclassify when
available. (signbit): Use __builtin_signbit(f/l).
(isfinite): Use__builtin_isfinite. (isnormal): Use
__builtin_isnormal. (isnan): Use __builtin_isnan.
(isinf): Use __builtin_isinf_sign.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/NEWS b/NEWS index 6a69bdb483..8f487fac8d 100644 --- a/NEWS +++ b/NEWS @@ -9,13 +9,14 @@ Version 2.23 * The following bugs are resolved with this release: - 2542, 2543, 2558, 2898, 4404, 6803, 14341, 14912, 15384, 15786, 15918, - 16141, 16296, 16415, 16517, 16519, 16520, 16521, 16734, 16973, 16985, - 17118, 17243, 17244, 17787, 17886, 17887, 17905, 18084, 18086, 18240, - 18265, 18370, 18421, 18480, 18525, 18595, 18610, 18618, 18647, 18661, - 18674, 18675, 18681, 18757, 18778, 18781, 18787, 18789, 18790, 18795, - 18796, 18820, 18823, 18824, 18857, 18863, 18870, 18872, 18873, 18875, - 18887, 18921, 18951, 18952, 18961, 18966, 18967, 18970, 18977. + 2542, 2543, 2558, 2898, 4404, 6803, 14341, 14912, 15367, 15384, 15786, + 15918, 16141, 16296, 16415, 16517, 16519, 16520, 16521, 16734, 16973, + 16985, 17118, 17243, 17244, 17441, 17787, 17886, 17887, 17905, 18084, + 18086, 18240, 18265, 18370, 18421, 18480, 18525, 18595, 18610, 18618, + 18647, 18661, 18674, 18675, 18681, 18757, 18778, 18781, 18787, 18789, + 18790, 18795, 18796, 18820, 18823, 18824, 18857, 18863, 18870, 18872, + 18873, 18875, 18887, 18921, 18951, 18952, 18961, 18966, 18967, 18970, + 18977. * The obsolete header <regexp.h> has been removed. Programs that require this header must be updated to use <regex.h> instead. |