diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2015-10-21 16:40:20 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2015-10-21 16:40:20 +0000 |
| commit | 0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3 (patch) | |
| tree | 3089be81a979063289fe998a6f14681fa00ecd5a | |
| parent | 1245e51596059a9844cff0938b10009c3b156115 (diff) | |
| download | glibc-0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3.tar.gz glibc-0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3.tar.xz glibc-0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3.zip | |
Fix ldbl-128 j0l spurious underflows (bug 19156).
My recent addition of more tests for j0 showed up that the ldbl-128 implementation of j0l produces spurious underflow exceptions for arguments close to 0 (when the result is very close to 1). This patch fixes this by just returning the argument in that case. Tested for mips64 (where it fixes the recently-added tests that were previously failing). [BZ #19156] * sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_j0l): Return 1 for arguments very close to 0.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/e_j0l.c | 2 |
3 files changed, 9 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index f2422edc07..bc95bda32e 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2015-10-21 Joseph Myers <joseph@codesourcery.com> + + [BZ #19156] + * sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_j0l): Return 1 for + arguments very close to 0. + 2015-10-21 Chris Metcalf <cmetcalf@ezchip.com> * sysdeps/unix/sysv/linux/tile/sysdep.h (PSEUDO_END) diff --git a/NEWS b/NEWS index 1313ab25ff..de3a233388 100644 --- a/NEWS +++ b/NEWS @@ -20,7 +20,7 @@ Version 2.23 18952, 18953, 18956, 18961, 18966, 18967, 18969, 18970, 18977, 18980, 18981, 18982, 18985, 19003, 19007, 19012, 19016, 19018, 19032, 19046, 19049, 19050, 19059, 19071, 19074, 19076, 19077, 19078, 19079, 19085, - 19086, 19088, 19094, 19095, 19124, 19125, 19129, 19134, 19137. + 19086, 19088, 19094, 19095, 19124, 19125, 19129, 19134, 19137, 19156. * There is now a --disable-timezone-tools configure option for disabling the building and installing of the timezone related utilities (zic, zdump, and diff --git a/sysdeps/ieee754/ldbl-128/e_j0l.c b/sysdeps/ieee754/ldbl-128/e_j0l.c index 1320de7044..c208916a79 100644 --- a/sysdeps/ieee754/ldbl-128/e_j0l.c +++ b/sysdeps/ieee754/ldbl-128/e_j0l.c @@ -693,6 +693,8 @@ __ieee754_j0l (long double x) xx = fabsl (x); if (xx <= 2.0L) { + if (xx < 0x1p-57L) + return 1.0L; /* 0 <= x <= 2 */ z = xx * xx; p = z * z * neval (z, J0_2N, NJ0_2N) / deval (z, J0_2D, NJ0_2D); |