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| author | Joseph Myers <joseph@codesourcery.com> | 2015-02-26 12:57:21 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-02-26 12:57:21 +0000 |
| commit | 524ae9ea2e3ae9f5bf5d655595fda827e9dc50a1 (patch) | |
| tree | 363ab7a9bab473dc18c22b1179d8b549d8497f80 /NEWS | |
| parent | 23d43090e0b275e47e09e859823e965a1eb323dc (diff) | |
| download | glibc-524ae9ea2e3ae9f5bf5d655595fda827e9dc50a1.zip glibc-524ae9ea2e3ae9f5bf5d655595fda827e9dc50a1.tar.gz glibc-524ae9ea2e3ae9f5bf5d655595fda827e9dc50a1.tar.bz2 | |
Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029).
The ldbl-128ibm implementation of ilogbl produces incorrect results
when the high part of the argument is a power of 2 and the low part a
nonzero number with the opposite sign (and so the returned exponent
should be 1 less than that of the high part). For example, ilogbl
(0x1.ffffffffffffffp1L) returns 2 but should return 1. (This is
similar to (fixed) bug 16740 for frexpl, and bug 18030 for logbl.)
This patch adds checks for that case.
Tested for powerpc.
[BZ #18029]
* sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c (__ieee754_ilogbl):
Adjust exponent of power of 2 down when low part has opposite
sign.
* math/libm-test.inc (ilogb_test_data): Add more tests.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -12,7 +12,7 @@ Version 2.22 4719, 14841, 13064, 14094, 15319, 15467, 15790, 15969, 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. + 17999, 18019, 18020, 18029. * Character encoding and ctype tables were updated to Unicode 7.0.0, using new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red |