diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2015-08-13 16:40:39 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-08-13 16:40:39 +0000 |
| commit | 37d83a089ddf7649ea0a97d4121883381e23f999 (patch) | |
| tree | e5cbd0a6885b4c122099090852c5f5cdd72ae409 /math/auto-libm-test-in | |
| parent | a5cf909b8f25f8240eabc5f1ff96b4be0472d8e1 (diff) | |
| download | glibc-37d83a089ddf7649ea0a97d4121883381e23f999.tar.gz | |
Fix tanh missing underflows (bug 16520).
Similar to various other bugs in this area, some tanh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact. This patch forces the exception in a
similar way to previous fixes.
Tested for x86_64, x86, mips64 and powerpc.
[BZ #16520]
* sysdeps/ieee754/dbl-64/s_tanh.c: Include <float.h>.
(__tanh): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/flt-32/s_tanhf.c: Include <float.h>.
(__tanhf): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-128/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-128ibm/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-96/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* math/auto-libm-test-in: Add more tests of tanh.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
Diffstat (limited to 'math/auto-libm-test-in')
| -rw-r--r-- | math/auto-libm-test-in | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in index c32e436905..b14146e2b6 100644 --- a/math/auto-libm-test-in +++ b/math/auto-libm-test-in @@ -2779,6 +2779,10 @@ tanh -0x2.6082fp-4 tanh 0xe.05031p-16 tanh 0x3.c80eaa7adaa3p-4 tanh 0x2.00f9857616524p-4 +tanh min +tanh -min +tanh min_subnorm +tanh -min_subnorm tgamma 0.5 tgamma -0.5 |