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| author | Joseph Myers <joseph@codesourcery.com> | 2015-10-23 21:37:33 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-10-23 21:37:33 +0000 |
| commit | c643db8792102d1a2efad109f58139977d8608d6 (patch) | |
| tree | 174813e539b6cdf509201237756ec2b02e2247ce /sysdeps/ieee754/ldbl-96/e_j1l.c | |
| parent | 846d9a4a3acdb4939ca7bf6aed48f9f6f26911be (diff) | |
| download | glibc-c643db8792102d1a2efad109f58139977d8608d6.tar.gz glibc-c643db8792102d1a2efad109f58139977d8608d6.tar.xz glibc-c643db8792102d1a2efad109f58139977d8608d6.zip | |
Fix j1, jn missing errno setting on underflow (bug 18611).
j1 and jn can underflow for small arguments, but fail to set errno when underflowing to 0. This patch fixes them to set errno in that case. Tested for x86_64, x86, mips64 and powerpc. [BZ #18611] * sysdeps/ieee754/dbl-64/e_j1.c (__ieee754_j1): Set errno and avoid excess range and precision on underflow. * sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise. * sysdeps/ieee754/flt-32/e_j1f.c (__ieee754_j1f): Likewise. * sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_j1l): Set errno on underflow. * sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-96/e_j1l.c (__ieee754_j1l): Likewise. * sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise. * math/auto-libm-test-in: Do not allow missing errno setting for tests of j1 and jn. * math/auto-libm-test-out: Regenerated.
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/e_j1l.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_j1l.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-96/e_j1l.c b/sysdeps/ieee754/ldbl-96/e_j1l.c index 1bca949e5a..e8a7349cf4 100644 --- a/sysdeps/ieee754/ldbl-96/e_j1l.c +++ b/sysdeps/ieee754/ldbl-96/e_j1l.c @@ -155,6 +155,8 @@ __ieee754_j1l (long double x) { long double ret = 0.5 * x; math_check_force_underflow (ret); + if (ret == 0 && x != 0) + __set_errno (ERANGE); return ret; } } |