diff options
| 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 /sysdeps/x86_64 | |
| parent | d1a3dcabf2f89233a99a4a9be08f9f407da0b6b4 (diff) | |
| download | glibc-43576de04afc6a0896a3ecc094e1581069a0652a.zip glibc-43576de04afc6a0896a3ecc094e1581069a0652a.tar.gz glibc-43576de04afc6a0896a3ecc094e1581069a0652a.tar.bz2 | |
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 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/fpu/libm-test-ulps | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps index 0edb95e..c621a03 100644 --- a/sysdeps/x86_64/fpu/libm-test-ulps +++ b/sysdeps/x86_64/fpu/libm-test-ulps @@ -1734,16 +1734,16 @@ float128: 4 ldouble: 5 Function: "tgamma_downward": -double: 8 +double: 9 float: 7 float128: 5 -ldouble: 5 +ldouble: 6 Function: "tgamma_towardzero": double: 9 float: 7 float128: 5 -ldouble: 5 +ldouble: 6 Function: "tgamma_upward": double: 9 |