mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 14:50:17 +00:00
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* Raise given exceptions, given the SPEFSCR bits for those exceptions.
|
|
Copyright (C) 1997-2015 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
int
|
|
__FERAISEEXCEPT_INTERNAL (int excepts)
|
|
{
|
|
unsigned long f;
|
|
|
|
f = fegetenv_register ();
|
|
f |= (excepts & SPEFSCR_ALL_EXCEPT);
|
|
fesetenv_register (f);
|
|
|
|
/* Force the operations that cause the exceptions. */
|
|
if ((SPEFSCR_FINVS & excepts) != 0)
|
|
/* 0 / 0 */
|
|
asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
|
|
|
|
if ((SPEFSCR_FDBZS & excepts) != 0)
|
|
/* 1.0 / 0.0 */
|
|
asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0));
|
|
|
|
if ((SPEFSCR_FOVFS & excepts) != 0)
|
|
/* Largest normalized number plus itself. */
|
|
asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
|
|
|
|
if ((SPEFSCR_FUNFS & excepts) != 0)
|
|
/* Smallest normalized number times itself. */
|
|
asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
|
|
|
|
if ((SPEFSCR_FINXS & excepts) != 0)
|
|
/* Smallest normalized minus 1.0 raises the inexact flag. */
|
|
asm volatile ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F));
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|