Viewing file:  sfp-exceptions.c (2.19 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Copyright (C) 2016-2022 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"
/* Only provide exception support if we have hardware floating point and we can
execute the mtfsf instruction. This would only be true if we are using the
emulation routines for IEEE 128-bit floating point on pre-ISA 3.0 machines
without the IEEE 128-bit floating point support. */
#ifndef __NO_FPRS__
void
__sfp_handle_exceptions (int _fex)
{
const double fp_max = __DBL_MAX__;
const double fp_min = __DBL_MIN__;
const double fp_zero = (double) 0.0;
const double fp_one = 1.0;
double tmp;
if (_fex & FP_EX_INVALID)
{
__asm__ __volatile__ ("fdiv %0, %1, %1"
: "=f" (tmp)
: "f" (fp_zero));
}
if (_fex & FP_EX_DIVZERO)
{
__asm__ __volatile__ ("fdiv %0, %1, %2"
: "=f" (tmp)
: "f" (fp_one), "f" (fp_zero));
}
if (_fex & FP_EX_OVERFLOW)
{
__asm__ __volatile__ ("fadd %0, %1, %1"
: "=f" (tmp)
: "f" (fp_max));
}
if (_fex & FP_EX_UNDERFLOW)
{
__asm__ __volatile__ ("fmul %0, %1, %1"
: "=f" (tmp)
: "f" (fp_min));
}
if (_fex & FP_EX_INEXACT)
{
__asm__ __volatile__ ("fsub %0, %1, %2"
: "=f" (tmp)
: "f" (fp_max), "f" (fp_one));
}
}
#endif /* !__NO_FPRS__ */
|
