mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* Store current floating-point environment and clear exceptions.
|
|
Copyright (C) 2001 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <fenv.h>
|
|
|
|
int
|
|
feholdexcept (fenv_t *envp)
|
|
{
|
|
unsigned short int work;
|
|
unsigned int mxcsr;
|
|
|
|
/* Store the environment. */
|
|
__asm__ ("fnstenv %0\n"
|
|
"stmxcsr %1" : "=m" (*envp), "=m" (envp->__mxcsr));
|
|
|
|
/* Now set all exceptions to non-stop, first the x87 FPU. */
|
|
work = envp->__control_word | 0x3f;
|
|
__asm__ ("fldcw %0" : : "m" (*&work));
|
|
|
|
/* Set the SSE MXCSR register. */
|
|
mxcsr = envp->__mxcsr | 0x1f80;
|
|
__asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
|
|
|
|
return 0;
|
|
}
|