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/* Raise given exceptions.
Copyright (C) 1997-2021 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
<https://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <float.h>
#include <math.h>
int
__feraiseexcept (int excepts)
{
/* Raise exceptions represented by EXCEPTS. But we must raise only one
signal at a time. It is important that if the overflow/underflow
exception and the divide by zero exception are given at the same
time, the overflow/underflow exception follows the divide by zero
exception. */
/* First: invalid exception. */
if (excepts & FE_INVALID)
{
/* One example of an invalid operation is 0 * Infinity. */
double d = HUGE_VAL;
__asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
}
/* Next: division by zero. */
if (excepts & FE_DIVBYZERO)
{
double d = 1.0;
__asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
}
/* Next: overflow. */
if (excepts & FE_OVERFLOW)
{
long double d = LDBL_MAX;
__asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d));
}
/* Next: underflow. */
if (excepts & FE_UNDERFLOW)
{
long double d = -LDBL_MAX;
__asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d));
}
/* Last: inexact. */
if (excepts & FE_INEXACT)
{
long double d = 1.0;
__asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d));
}
/* Success. */
return 0;
}
#include <shlib-compat.h>
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
strong_alias (__feraiseexcept, __old_feraiseexcept)
compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
#endif
libm_hidden_def (__feraiseexcept)
libm_hidden_ver (__feraiseexcept, feraiseexcept)
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
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