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author | Joseph Myers <joseph@codesourcery.com> | 2015-12-09 23:51:11 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2015-12-09 23:51:11 +0000 |
commit | e6a6b1c3de62f3ae3f0e5ac5bdcc49a3342f03e7 (patch) | |
tree | a239075b91eca073d80677205d27516017105e63 /catgets | |
parent | f517e06ab71e07b24bf085063b0ba2d072da4a56 (diff) | |
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Fix ldbl-128ibm logl inaccuracy near 1 (bug 19351).
The ldbl-128ibm implementation of logl is inaccurate for arguments
near 1, because when deciding whether to bypass a series expansion for
log(1+z), where z = x-1, it compares the square of z rather than z
itself with an epsilon value. This patch fixes that comparison, so
eliminating the test failures for inaccuracy of logl in such cases.
Tested for powerpc.
[BZ #19351]
* sysdeps/ieee754/ldbl-128ibm/e_logl.c (__ieee754_logl): When
expanding log(1+z), compare z rather than its square with epsilon
to determine when to avoid evaluating the expansion.
Diffstat (limited to 'catgets')
0 files changed, 0 insertions, 0 deletions