1a6d7967ad
2000-06-29 Jakub Jelinek <jakub@redhat.com> * shlib-versions: Make sparc64 GLIBC_2.2+ only.
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* Raise given exceptions.
|
|
Copyright (C) 1997, 1999, 2000 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <fenv.h>
|
|
#include <math.h>
|
|
#include <shlib-compat.h>
|
|
|
|
int
|
|
__feraiseexcept (int excepts)
|
|
{
|
|
static volatile double sink;
|
|
static const struct {
|
|
double zero, one, max, min, sixteen, pi;
|
|
} c = {
|
|
0.0, 1.0, DBL_MAX, DBL_MIN, 16.0, M_PI
|
|
};
|
|
|
|
/* Raise exceptions represented by EXPECTS. But we must raise only
|
|
one signal at a time. It is important the if the overflow/underflow
|
|
exception and the inexact exception are given at the same time,
|
|
the overflow/underflow exception follows the inexact exception. */
|
|
|
|
/* First: invalid exception. */
|
|
if ((FE_INVALID & excepts) != 0)
|
|
/* One example of a invalid operation is 0/0. */
|
|
sink = c.zero / c.zero;
|
|
|
|
/* Next: division by zero. */
|
|
if ((FE_DIVBYZERO & excepts) != 0)
|
|
sink = c.one / c.zero;
|
|
|
|
/* Next: overflow. */
|
|
if ((FE_OVERFLOW & excepts) != 0)
|
|
sink = c.max * c.max;
|
|
|
|
/* Next: underflow. */
|
|
if ((FE_UNDERFLOW & excepts) != 0)
|
|
sink = c.min / c.sixteen;
|
|
|
|
/* Last: inexact. */
|
|
if ((FE_INEXACT & excepts) != 0)
|
|
sink = c.one / c.pi;
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#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
|
|
|
|
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
|