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/* Raise given exceptions.
Copyright (C) 1997,99,2000,01,02,04 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 "fpu/fenv_libc.h"
int
__FERAISEEXCEPT_INTERNAL (int excepts)
{
unsigned long f;
f = fegetenv_register ();
f |= (excepts & FE_ALL_EXCEPT);
fesetenv_register (f);
/* Force the operations that cause the exceptions. */
if ((FE_INVALID & excepts) != 0)
{
/* ?? Does not set sticky bit ?? */
/* 0 / 0 */
asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
}
if ((FE_DIVBYZERO & excepts) != 0)
{
/* 1.0 / 0.0 */
asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0));
}
if ((FE_OVERFLOW & excepts) != 0)
{
/* ?? Does not set sticky bit ?? */
/* Largest normalized number plus itself. */
asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
}
if ((FE_UNDERFLOW & excepts) != 0)
{
/* ?? Does not set sticky bit ?? */
/* Smallest normalized number times itself. */
asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
}
if ((FE_INEXACT & 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;
}
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