mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Install given floating-point environment and raise exceptions.
|
|
Copyright (C) 1997-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
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.h>
|
|
#include <unistd.h>
|
|
#include <dl-procinfo.h>
|
|
#include <ldsodefs.h>
|
|
|
|
int
|
|
__feupdateenv (const fenv_t *envp)
|
|
{
|
|
fexcept_t temp;
|
|
unsigned int xtemp = 0;
|
|
|
|
/* Save current exceptions. */
|
|
__asm__ ("fnstsw %0" : "=m" (*&temp));
|
|
|
|
/* If the CPU supports SSE we test the MXCSR as well. */
|
|
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
|
|
__asm__ ("stmxcsr %0" : "=m" (*&xtemp));
|
|
|
|
temp = (temp | xtemp) & FE_ALL_EXCEPT;
|
|
|
|
/* Install new environment. */
|
|
fesetenv (envp);
|
|
|
|
/* Raise the saved exception. Incidently for us the implementation
|
|
defined format of the values in objects of type fexcept_t is the
|
|
same as the ones specified using the FE_* constants. */
|
|
__feraiseexcept ((int) temp);
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
|
|
strong_alias (__feupdateenv, __old_feupdateenv)
|
|
compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
|
|
#endif
|
|
|
|
libm_hidden_ver (__feupdateenv, feupdateenv)
|
|
versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);
|