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| author | Joseph Myers <joseph@codesourcery.com> | 2015-09-17 15:51:54 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-09-17 15:51:54 +0000 |
| commit | 46f74e1deee549b41160d353ce0c8f7db555d36c (patch) | |
| tree | 19f07ad8fb51bb5e8de5106dc98654e7817eb04e /ChangeLog | |
| parent | e67dc1b57f1fc8407cb45bdb38ae1eaa0a5c6f78 (diff) | |
| download | glibc-46f74e1deee549b41160d353ce0c8f7db555d36c.tar.gz glibc-46f74e1deee549b41160d353ce0c8f7db555d36c.tar.xz glibc-46f74e1deee549b41160d353ce0c8f7db555d36c.zip | |
Fix tgamma missing underflows (bug 18951).
Similar to various other bugs in this area, tgamma functions can fail to raise the underflow exception when the result is tiny and inexact but one or more low bits of the intermediate result that is scaled down are zero. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, mips64 and powerpc. [BZ #18951] * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Force underflow exception for small results. * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): Likewise. * math/auto-libm-test-in: Add more tests of tgamma. * math/auto-libm-test-out: Regenerated.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 2a442d2fff..5573096bb6 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,19 @@ +2015-09-17 Joseph Myers <joseph@codesourcery.com> + + [BZ #18951] + * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Force + underflow exception for small results. + * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): + Likewise. + * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): + Likewise. + * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): + Likewise. + * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): + Likewise. + * math/auto-libm-test-in: Add more tests of tgamma. + * math/auto-libm-test-out: Regenerated. + 2015-09-17 Andreas Schwab <schwab@suse.de> * sysdeps/unix/sysv/linux/sparc/sparc64/semctl.c: Readd. |