mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 09:30:06 +00:00
d4d0ecb244
This patch fixes a bug introduced by 18f2945ae9, where it optimizes
the FPSCR set by just issuing a mtfs instruction if new flag is different
from older one. The issue is a typo, where the new flag should the the
new value, instead of the old one.
It fixes BZ#17885.
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Set floating-point environment exception handling.
|
|
Copyright (C) 1997-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
int
|
|
__fesetexceptflag (const fexcept_t *flagp, int excepts)
|
|
{
|
|
fenv_union_t u, n;
|
|
fexcept_t flag;
|
|
|
|
/* Get the current state. */
|
|
u.fenv = fegetenv_register ();
|
|
|
|
/* Ignore exceptions not listed in 'excepts'. */
|
|
flag = *flagp & excepts;
|
|
|
|
/* Replace the exception status */
|
|
n.l = ((u.l & ~(FPSCR_STICKY_BITS & excepts))
|
|
| (flag & FPSCR_STICKY_BITS)
|
|
| (flag >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
|
|
& FE_INVALID_SOFTWARE));
|
|
|
|
/* Store the new status word (along with the rest of the environment).
|
|
This may cause floating-point exceptions if the restored state
|
|
requests it. */
|
|
if (n.l != u.l)
|
|
fesetenv_register (n.fenv);
|
|
|
|
/* Deal with FE_INVALID_SOFTWARE not being implemented on some chips. */
|
|
if (flag & FE_INVALID)
|
|
feraiseexcept(FE_INVALID);
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
|
|
strong_alias (__fesetexceptflag, __old_fesetexceptflag)
|
|
compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
|
|
#endif
|
|
|
|
versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);
|