mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* Set floating-point environment exception handling.
|
|
Copyright (C) 2000-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
|
|
|
|
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>
|
|
#include <math.h>
|
|
#include <fpu_control.h>
|
|
|
|
int
|
|
fesetexceptflag (const fexcept_t *flagp, int excepts)
|
|
{
|
|
fexcept_t temp,newexcepts;
|
|
|
|
/* Get the current environment. We have to do this since we cannot
|
|
separately set the status word. */
|
|
_FPU_GETCW (temp);
|
|
/* Install the new exception bits in the Accrued Exception Byte. */
|
|
excepts = excepts & FE_ALL_EXCEPT;
|
|
newexcepts = (excepts << FPC_DXC_SHIFT) | (excepts << FPC_FLAGS_SHIFT);
|
|
temp &= ~newexcepts;
|
|
temp |= *flagp & newexcepts;
|
|
|
|
/* Store the new status word (along with the rest of the environment.
|
|
Possibly new exceptions are set but they won't get executed unless
|
|
the next floating-point instruction. */
|
|
_FPU_SETCW (temp);
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|