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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 | |
| parent | 846d9a4a3acdb4939ca7bf6aed48f9f6f26911be (diff) | |
| download | glibc-c643db8792102d1a2efad109f58139977d8608d6.tar glibc-c643db8792102d1a2efad109f58139977d8608d6.tar.gz glibc-c643db8792102d1a2efad109f58139977d8608d6.tar.bz2 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')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_j1l.c | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_jnl.c | 5 |
2 files changed, 6 insertions, 1 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; } } diff --git a/sysdeps/ieee754/ldbl-96/e_jnl.c b/sysdeps/ieee754/ldbl-96/e_jnl.c index ed2068b5e2..92f96921a7 100644 --- a/sysdeps/ieee754/ldbl-96/e_jnl.c +++ b/sysdeps/ieee754/ldbl-96/e_jnl.c @@ -289,7 +289,10 @@ __ieee754_jnl (int n, long double x) ret = b; } if (ret == 0) - ret = __copysignl (LDBL_MIN, ret) * LDBL_MIN; + { + ret = __copysignl (LDBL_MIN, ret) * LDBL_MIN; + __set_errno (ERANGE); + } else math_check_force_underflow (ret); return ret; |