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/*
* Copyright (C) 2012-2014 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/>.
*/
#include "sfp-machine.h"
void
__sfp_handle_exceptions (int _fex)
{
const float fp_max = __FLT_MAX__;
const float fp_min = __FLT_MIN__;
const float fp_1e32 = 1.0e32f;
const float fp_zero = 0.0;
const float fp_one = 1.0;
unsigned fpsr;
if (_fex & FP_EX_INVALID)
{
__asm__ __volatile__ ("fdiv\ts0, %s0, %s0"
:
: "w" (fp_zero)
: "s0");
__asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
}
if (_fex & FP_EX_DIVZERO)
{
__asm__ __volatile__ ("fdiv\ts0, %s0, %s1"
:
: "w" (fp_one), "w" (fp_zero)
: "s0");
__asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
}
if (_fex & FP_EX_OVERFLOW)
{
__asm__ __volatile__ ("fadd\ts0, %s0, %s1"
:
: "w" (fp_max), "w" (fp_1e32)
: "s0");
__asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
}
if (_fex & FP_EX_UNDERFLOW)
{
__asm__ __volatile__ ("fmul\ts0, %s0, %s0"
:
: "w" (fp_min)
: "s0");
__asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
}
if (_fex & FP_EX_INEXACT)
{
__asm__ __volatile__ ("fsub\ts0, %s0, %s1"
:
: "w" (fp_max), "w" (fp_one)
: "s0");
__asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
}
}
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