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glibc/ports/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c
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/* Raise given exceptions. | |
Copyright (C) 1997-2013 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> | |
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.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_ver (__feraiseexcept, feraiseexcept) | |
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |