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| author | Joseph Myers <joseph@codesourcery.com> | 2015-02-26 21:06:34 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-02-26 21:06:34 +0000 |
| commit | 1d9ab20c14211abbf45514e63c190dfeec27fa5e (patch) | |
| tree | cbe705e320799863f477d32c3062f6260c0c72a2 /NEWS | |
| parent | ec0ce0d3be4ae21add09139c705852ed8bb114c7 (diff) | |
| download | glibc-1d9ab20c14211abbf45514e63c190dfeec27fa5e.tar.gz glibc-1d9ab20c14211abbf45514e63c190dfeec27fa5e.tar.xz glibc-1d9ab20c14211abbf45514e63c190dfeec27fa5e.zip | |
Fix ldbl-128/ldbl-128ibm acosl inaccuracy (bug 18038, bug 18039).
The ldbl-128 and ldbl-128ibm implementations of acosl have similar bugs, using a threshold of 0x1p-57L to determine when they just return pi/2. Since the result pi/2 - asinl (x) is roughly pi/2 - x for small x, the relevant cut-off is actually x being < 0.5ulp of 1. This patch fixes the implementations to use that cut-off and adds tests of small acos arguments. Tested for powerpc and mips64. Also tested for x86_64 and x86; no ulps updates needed. [BZ #18038] [BZ #18039] * sysdeps/ieee754/ldbl-128/e_acosl.c (__ieee754_acosl): Only return pi/2 for arguments below 0x1p-113L. * sysdeps/ieee754/ldbl-128ibm/e_acosl.c (__ieee754_acosl): Only return pi/2 for arguments below 0x1p-106L. * math/auto-libm-test-in: Add more tests of acos. * math/auto-libm-test-out: Regenerated.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/NEWS b/NEWS index 40959d3530..24ebc36ff6 100644 --- a/NEWS +++ b/NEWS @@ -12,7 +12,7 @@ Version 2.22 4719, 14841, 13064, 14094, 15319, 15467, 15790, 15969, 16351, 16560, 16783, 17269, 17523, 17569, 17588, 17792, 17836, 17912, 17916, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, - 17998, 17999, 18019, 18020, 18029, 18030, 18032. + 17998, 17999, 18019, 18020, 18029, 18030, 18032, 18038, 18039. * Character encoding and ctype tables were updated to Unicode 7.0.0, using new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red |