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/* Store current floating-point environment.
Copyright (C) 1997-2020 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
<https://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
__fegetenv (fenv_t *envp)
{
__asm__ ("fnstenv %0" : "=m" (*envp));
/* And load it right back since the processor changes the mask.
Intel thought this opcode to be used in interrupt handlers which
would block all exceptions. */
__asm__ ("fldenv %0" : : "m" (*envp));
if (HAS_CPU_FEATURE (SSE))
__asm__ ("stmxcsr %0" : "=m" (envp->__eip));
/* Success. */
return 0;
}
#include <shlib-compat.h>
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
strong_alias (__fegetenv, __old_fegetenv)
compat_symbol (libm, __old_fegetenv, fegetenv, GLIBC_2_1);
#endif
libm_hidden_def (__fegetenv)
libm_hidden_ver (__fegetenv, fegetenv)
versioned_symbol (libm, __fegetenv, fegetenv, GLIBC_2_2);
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