mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/* Store current floating-point environment and clear exceptions.
|
|
Copyright (C) 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David Huggins-Daines <dhd@debian.org>, 2000
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <fenv.h>
|
|
#include <string.h>
|
|
|
|
int
|
|
feholdexcept (fenv_t *envp)
|
|
{
|
|
fenv_t clear;
|
|
fenv_t * _regs = envp;
|
|
|
|
/* Store the environment. */
|
|
__asm__ (
|
|
"fstd,ma %%fr0,8(%1)\n"
|
|
"fstd,ma %%fr1,8(%1)\n"
|
|
"fstd,ma %%fr2,8(%1)\n"
|
|
"fstd %%fr3,0(%1)\n"
|
|
: "=m" (*_regs), "+r" (_regs));
|
|
memcpy (&clear, envp, sizeof (clear));
|
|
|
|
/* Now clear all exceptions. */
|
|
clear.__status_word &= ~(FE_ALL_EXCEPT << 27);
|
|
memset (clear.__exception, 0, sizeof (clear.__exception));
|
|
|
|
/* And set all exceptions to non-stop. */
|
|
clear.__status_word &= ~FE_ALL_EXCEPT;
|
|
|
|
/* Load the new environment. */
|
|
_regs = &clear;
|
|
__asm__ (
|
|
"fldd,ma -8(%1),%%fr3\n"
|
|
"fldd,ma -8(%1),%%fr2\n"
|
|
"fldd,ma -8(%1),%%fr1\n"
|
|
"fldd 0(%1),%%fr0\n"
|
|
: "=m" (*_regs), "+r" (_regs));
|
|
|
|
return 0;
|
|
}
|