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/* Definitions of target machine for GNU compiler, for IBM S/390
   Copyright (C) 1999, 2000, 2001, 2007, 2008 and 2009
   Free Software Foundation, Inc.
   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
                  Ulrich Weigand (uweigand@de.ibm.com).
 
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 3, or (at your option) any later
version.
 
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.
 
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/>.  */
 
#define EXP(fp)         (((fp.l) >> 23) & 0xFF)
#define EXCESS          126
#define SIGNBIT         0x80000000
#define SIGN(fp)        ((fp.l) & SIGNBIT)
#define HIDDEN          (1 << 23)
#define MANT(fp)        (((fp.l) & 0x7FFFFF) | HIDDEN)
#define FRAC(fp)        ((fp.l) & 0x7FFFFF)
 
typedef int DItype_x __attribute__ ((mode (DI)));
typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
typedef int SItype_x __attribute__ ((mode (SI)));
typedef unsigned int USItype_x __attribute__ ((mode (SI)));
 
union float_long
  {
    float f;
    USItype_x l;
  };
 
DItype_x __fixsfdi (float a1);
 
/* convert double to int */
DItype_x
__fixsfdi (float a1)
{
    register union float_long fl1;
    register int exp;
    register DItype_x l;
 
    fl1.f = a1;
 
    /* +/- 0, denormalized */
 
    if (!EXP (fl1))
      return 0;
 
    exp = EXP (fl1) - EXCESS - 24;
 
    /* number < 1 */
 
    if (exp < -24)
      return 0;
 
    /* NaN */
 
    if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
      return 0x8000000000000000ULL;
 
    /* Number big number & +/- inf */
 
    if (exp >= 40) {
	l = (long long)1<<63;
	if (!SIGN(fl1))
	    l--;
	return l;
    }
 
    l = MANT(fl1);
 
    if (exp > 0)
      l <<= exp;
    else
      l >>= -exp;
 
    return (SIGN (fl1) ? -l : l);
}