Subversion Repositories openrisc_2011-10-31

/* Temporary library support for decimal floating point.

   Copyright (C) 2005, 2006 Free Software Foundation, Inc.

   This file is part of GCC.

   GCC 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 2, or (at your option)

   any later version.

   In addition to the permissions in the GNU General Public License,

   the Free Software Foundation gives you unlimited permission to link

   the compiled version of this file into combinations with other

   programs, and to distribute those combinations without any

   restriction coming from the use of this file.  (The General Public

   License restrictions do apply in other respects; for example, they

   cover modification of the file, and distribution when not linked

   into a combine executable.)

   GCC 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.

   You should have received a copy of the GNU General Public License

   along with GCC; see the file COPYING.  If not, write to the Free

   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

   02110-1301, USA.  */

#include "config.h"

#include "decContext.h"

#include "decimal128.h"

#include "decimal64.h"

#include "decimal32.h"

void __host_to_ieee_32 (_Decimal32, decimal32 *);

void __host_to_ieee_64 (_Decimal64, decimal64 *);

void __host_to_ieee_128 (_Decimal128, decimal128 *);

extern int isinfd32 (_Decimal32);

extern int isinfd64 (_Decimal64);

extern int isinfd128 (_Decimal128);

extern void __dfp_enable_traps (void);

extern void __dfp_raise (int exception __attribute__ ((unused)));

int

isinfd32 (_Decimal32 arg)

{

  decNumber dn;

  decimal32 d32;

  __host_to_ieee_32 (arg, &d32);

  decimal32ToNumber (&d32, &dn);

  return (decNumberIsInfinite (&dn));

}

int

isinfd64 (_Decimal64 arg)

{

  decNumber dn;

  decimal64 d64;

  __host_to_ieee_64 (arg, &d64);

  decimal64ToNumber (&d64, &dn);

  return (decNumberIsInfinite (&dn));

}

int

isinfd128 (_Decimal128 arg)

{

  decNumber dn;

  decimal128 d128;

  __host_to_ieee_128 (arg, &d128);

  decimal128ToNumber (&d128, &dn);

  return (decNumberIsInfinite (&dn));

}

int __dfp_traps;

void

__dfp_enable_traps (void)

{

  __dfp_traps = 1;

}

void

__dfp_raise (int exception __attribute__ ((unused)))

{

  raise (SIGFPE);

}

uint32_t

__dec_byte_swap (uint32_t in)

{

  uint32_t out = 0;

  unsigned char *p = (unsigned char *) &out;

  union {

    uint32_t i;

    unsigned char b[4];

  } u;

  u.i = in;

  p[0] = u.b[3];

  p[1] = u.b[2];

  p[2] = u.b[1];

  p[3] = u.b[0];

  return out;

}