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| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-06-01 19:01:17 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-06-01 19:01:17 +0000 |
| commit | efb734887e10cb5adb0e722012fd65df8d1f8ff5 (patch) | |
| tree | 00e43dda8e6a89849f3566a9c806baf4838112f5 | |
| parent | 29bcce7ce456a9fe098793784b97c7e2cd446aca (diff) | |
| download | glibc-efb734887e10cb5adb0e722012fd65df8d1f8ff5.tar glibc-efb734887e10cb5adb0e722012fd65df8d1f8ff5.tar.gz glibc-efb734887e10cb5adb0e722012fd65df8d1f8ff5.tar.bz2 glibc-efb734887e10cb5adb0e722012fd65df8d1f8ff5.zip | |
Add a barrier in the double fma implementation.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_fma.c | 4 |
2 files changed, 8 insertions, 1 deletions
@@ -1,3 +1,8 @@ +2012-06-01 Aurelien Jarno <aurelien@aurel32.net> + + * sysdeps/ieee754/dbl-64/s_fma.c (__fma): Ensure a1 + u.d + computation is not scheduled after fetestexcept. + 2012-06-01 H.J. Lu <hongjiu.lu@intel.com> [BZ #14117] diff --git a/sysdeps/ieee754/dbl-64/s_fma.c b/sysdeps/ieee754/dbl-64/s_fma.c index ab20a801a4..ce3bd36fac 100644 --- a/sysdeps/ieee754/dbl-64/s_fma.c +++ b/sysdeps/ieee754/dbl-64/s_fma.c @@ -1,5 +1,5 @@ /* Compute x * y + z as ternary operation. - Copyright (C) 2010, 2011 Free Software Foundation, Inc. + Copyright (C) 2010-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2010. @@ -158,6 +158,8 @@ __fma (double x, double y, double z) if ((u.ieee.mantissa1 & 1) == 0) u.ieee.mantissa1 |= libc_fetestexcept (FE_INEXACT) != 0; v.d = a1 + u.d; + /* Ensure the addition is not scheduled after fetestexcept call. */ + math_force_eval (v.d); } /* Reset rounding mode and test for inexact simultaneously. */ |