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| author | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2017-04-28 19:45:52 -0300 |
|---|---|---|
| committer | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2017-04-28 19:45:52 -0300 |
| commit | c064f6a613844181f411aabb2662384a6aefb69e (patch) | |
| tree | 87eddafe48fccaed565604fd1f405ad0437858f5 /ChangeLog | |
| parent | 2f7f3cd8cd302bb10908c86f3f7b349df0a78e6a (diff) | |
| download | glibc-c064f6a613844181f411aabb2662384a6aefb69e.zip glibc-c064f6a613844181f411aabb2662384a6aefb69e.tar.gz glibc-c064f6a613844181f411aabb2662384a6aefb69e.tar.bz2 | |
powerpc: Fix logbl on power7 [BZ# 21280]
1. Fix the results for negative subnormals by ignoring the signal when
normalizing the value.
2. Fix the output when the high part is a power of 2 and the low part
is a nonzero number with opposite sign. This fix is based on commit
380bd0fd2418f8988217de950f8b8ff18af0cb2b.
After applying this patch, logbl() tests pass cleanly on POWER >= 7.
Tested on powerpc, powerpc64 and powerpc64le
[BZ #21280]
* sysdeps/powerpc/power7/fpu/s_logbl.c (__logbl): Ignore the
signal of subnormals and adjust the exponent of power of 2 down
when low part has opposite sign.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -1,3 +1,10 @@ +2017-04-28 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> + + [BZ #21280] + * sysdeps/powerpc/power7/fpu/s_logbl.c (__logbl): Ignore the + signal of subnormals and adjust the exponent of power of 2 down + when low part has opposite sign. + 2017-04-28 Paul E. Murphy <murphyp@linux.vnet.ibm.com> * sysdeps/powerpc/powerpc64le/Implies: New file. |