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authorPaul Zimmermann <Paul.Zimmermann@inria.fr>2021-04-02 08:21:06 +0200
committerPaul Zimmermann <Paul.Zimmermann@inria.fr>2021-04-07 13:23:39 +0200
commit43576de04afc6a0896a3ecc094e1581069a0652a (patch)
tree42b35efc19ae2a9f22c354176d83173f74818268 /configure.ac
parentd1a3dcabf2f89233a99a4a9be08f9f407da0b6b4 (diff)
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Improve the accuracy of tgamma (BZ #26983)
With this patch, the maximal known error for tgamma is now reduced to 9 ulps
for dbl-64, for all rounding modes. Since exhaustive testing is not possible
for dbl-64, it might be that there are still cases with an error larger than
9 ulps, but all known cases are fixed (intensive tests were done to find cases
with large errors).

Tested on x86_64 and powerpc (and by Adhemerval Zanella on aarch64, arm,
s390x, sparc, and i686).
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
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