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/*
* Copyright (C) 2012-2013 Free Software Foundation, Inc.
*
* This file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 3, or (at your option) any
* later version.
*
* This file 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
* General Public License for more details.
*
* Under Section 7 of GPL version 3, you are granted additional
* permissions described in the GCC Runtime Library Exception, version
* 3.1, as published by the Free Software Foundation.
*
* You should have received a copy of the GNU General Public License and
* a copy of the GCC Runtime Library Exception along with this program;
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef _SOFT_FLOAT
#include "sfp-machine.h"
struct fenv
{
unsigned short int __control_word;
unsigned short int __unused1;
unsigned short int __status_word;
unsigned short int __unused2;
unsigned short int __tags;
unsigned short int __unused3;
unsigned int __eip;
unsigned short int __cs_selector;
unsigned int __opcode:11;
unsigned int __unused4:5;
unsigned int __data_offset;
unsigned short int __data_selector;
unsigned short int __unused5;
};
void
__sfp_handle_exceptions (int _fex)
{
if (_fex & FP_EX_INVALID)
{
float f = 0.0f;
#ifdef __x86_64__
asm volatile ("%vdivss\t{%0, %d0|%d0, %0}" : "+x" (f));
#else
asm volatile ("fdiv\t{%y0, %0|%0, %y0}" : "+t" (f));
asm volatile ("fwait");
#endif
}
if (_fex & FP_EX_DIVZERO)
{
float f = 1.0f, g = 0.0f;
#ifdef __x86_64__
asm volatile ("%vdivss\t{%1, %d0|%d0, %1}" : "+x" (f) : "xm" (g));
#else
asm volatile ("fdivs\t%1" : "+t" (f) : "m" (g));
asm volatile ("fwait");
#endif
}
if (_fex & FP_EX_OVERFLOW)
{
struct fenv temp;
asm volatile ("fnstenv\t%0" : "=m" (temp));
temp.__status_word |= FP_EX_OVERFLOW;
asm volatile ("fldenv\t%0" : : "m" (temp));
asm volatile ("fwait");
}
if (_fex & FP_EX_UNDERFLOW)
{
struct fenv temp;
asm volatile ("fnstenv\t%0" : "=m" (temp));
temp.__status_word |= FP_EX_UNDERFLOW;
asm volatile ("fldenv\t%0" : : "m" (temp));
asm volatile ("fwait");
}
if (_fex & FP_EX_INEXACT)
{
struct fenv temp;
asm volatile ("fnstenv\t%0" : "=m" (temp));
temp.__status_word |= FP_EX_INEXACT;
asm volatile ("fldenv\t%0" : : "m" (temp));
asm volatile ("fwait");
}
};
#endif
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