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| author | Paul Zimmermann <Paul.Zimmermann@inria.fr> | 2021-04-02 08:21:06 +0200 |
|---|---|---|
| committer | Paul Zimmermann <Paul.Zimmermann@inria.fr> | 2021-04-07 13:23:39 +0200 |
| commit | 43576de04afc6a0896a3ecc094e1581069a0652a (patch) | |
| tree | 42b35efc19ae2a9f22c354176d83173f74818268 /math/auto-libm-test-in | |
| parent | d1a3dcabf2f89233a99a4a9be08f9f407da0b6b4 (diff) | |
| download | glibc-43576de04afc6a0896a3ecc094e1581069a0652a.tar.gz glibc-43576de04afc6a0896a3ecc094e1581069a0652a.tar.xz glibc-43576de04afc6a0896a3ecc094e1581069a0652a.zip | |
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>
Diffstat (limited to 'math/auto-libm-test-in')
| -rw-r--r-- | math/auto-libm-test-in | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in index 9fbd0c626b..2045a0f8d1 100644 --- a/math/auto-libm-test-in +++ b/math/auto-libm-test-in @@ -8251,8 +8251,12 @@ tgamma -0x6.ce9158p+0 tgamma -0xd.cbf53d0e7d06p+0 # the next value generates larger error bounds on x86_64 (binary32) tgamma -0x3.0aa534p+0 -# the next value generates larger error bounds on x86_64 (binary64) +# the next values generate large error bounds on x86_64 (binary64) tgamma -0x1.62b8c36c7180bp+4 +tgamma -0x1.62c4d519e8677p+3 +tgamma -0x1.c033cc426752fp+2 +tgamma -0x1.62cfd0d34ade2p+3 +tgamma -0x1.8814da6eb7dbp+5 y0 0.125 y0 0.75 |