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| author | Joseph Myers <joseph@codesourcery.com> | 2015-09-30 21:44:42 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-09-30 21:44:42 +0000 |
| commit | 8c6c9236361fbc077769673c259828216403bc33 (patch) | |
| tree | 04b02cf33c6654bc380d2c2ef986c41c4166d2ee /NEWS | |
| parent | 93e448cbed1095c88133f2a304b1bbba72e480af (diff) | |
| download | glibc-8c6c9236361fbc077769673c259828216403bc33.tar glibc-8c6c9236361fbc077769673c259828216403bc33.tar.gz glibc-8c6c9236361fbc077769673c259828216403bc33.tar.bz2 glibc-8c6c9236361fbc077769673c259828216403bc33.zip | |
Fix i386 acosh (-qNaN) spurious "invalid" exception.
The i386 versions of acoshf and acosh raise a spurious "invalid"
exception for an argument that is a quiet NaN with the sign bit set.
The integer arithmetic to detect arguments < 1 also detects -NaN, and
then the computation 0 / 0 in that case raises the exception. This
patch fixes this by using (x - x) / (x - x) as the computation in that
case instead, which will always raise the exception for non-NaN
arguments reaching that code, but not for quiet NaN arguments.
Tested for x86_64 and x86.
[BZ #19032]
* sysdeps/i386/fpu/e_acosh.S (__ieee754_acosh): For arguments < 1,
compute result as (x - x) / (x - x) not as 0 / 0.
* sysdeps/i386/fpu/e_acoshf.S (__ieee754_acoshf): Likewise.
* math/libm-test.inc (acosh_test_data): Add another test of acosh.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -17,7 +17,7 @@ Version 2.23 18789, 18790, 18795, 18796, 18803, 18820, 18823, 18824, 18825, 18857, 18863, 18870, 18872, 18873, 18875, 18887, 18921, 18951, 18952, 18956, 18961, 18966, 18967, 18969, 18970, 18977, 18980, 18981, 18985, 19003, - 19016. + 19016, 19032. * The obsolete header <regexp.h> has been removed. Programs that require this header must be updated to use <regex.h> instead. |