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/* Subroutines for long double support.

   Copyright (C) 2000, 2002, 2004, 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.  */

/* HPUX TFmode compare requires a library call to _U_Qfcmp.  It takes

   a magic number as its third argument which indicates what to do.

   The return value is an integer to be compared against zero.  The

   comparison conditions are the same as those listed in Table 8-12

   of the PA-RISC 2.0 Architecture book for the fcmp instruction.  */

/* Raise FP_INVALID on SNaN as a side effect.  */

#define QCMP_INV 1

/* Comparison relations.  */

#define QCMP_UNORD 2

#define QCMP_EQ 4

#define QCMP_LT 8

#define QCMP_GT 16

int _U_Qfcmp (long double a, long double b, int);

long _U_Qfcnvfxt_quad_to_sgl (long double);

int _U_Qfeq (long double, long double);

int _U_Qfne (long double, long double);

int _U_Qfgt (long double, long double);

int _U_Qfge (long double, long double);

int _U_Qflt (long double, long double);

int _U_Qfle (long double, long double);

int _U_Qfltgt (long double, long double);

int _U_Qfunle (long double, long double);

int _U_Qfunlt (long double, long double);

int _U_Qfunge (long double, long double);

int _U_Qfungt (long double, long double);

int _U_Qfuneq (long double, long double);

int _U_Qfunord (long double, long double);

int _U_Qford (long double, long double);

int _U_Qfcomp (long double, long double);

long double _U_Qfneg (long double);

#ifdef __LP64__

int __U_Qfcnvfxt_quad_to_sgl (long double);

#endif

unsigned int _U_Qfcnvfxt_quad_to_usgl(long double);

unsigned long long _U_Qfcnvfxt_quad_to_udbl(long double);

int

_U_Qfeq (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_EQ) != 0);

}

int

_U_Qfne (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_EQ) == 0);

}

int

_U_Qfgt (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_GT) != 0);

}

int

_U_Qfge (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_GT) != 0);

}

int

_U_Qflt (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT) != 0);

}

int

_U_Qfle (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT) != 0);

}

int

_U_Qfltgt (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT | QCMP_GT) != 0);

}

int

_U_Qfunle (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_LT) != 0);

}

int

_U_Qfunlt (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_LT) != 0);

}

int

_U_Qfunge (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0);

}

int

_U_Qfungt (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_GT) != 0);

}

int

_U_Qfuneq (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ) != 0);

}

int

_U_Qfunord (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD) != 0);

}

int

_U_Qford (long double a, long double b)

{

  return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT | QCMP_GT) != 0);

}

int

_U_Qfcomp (long double a, long double b)

{

  if (_U_Qfcmp (a, b, QCMP_EQ) == 0)

    return 0;

  return (_U_Qfcmp (a, b, QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0 ? 1 : -1);

}

/* Negate long double A.  */

long double

_U_Qfneg (long double a)

{

  union

   {

     long double ld;

     int i[4];

   } u;

  u.ld = a;

  u.i[0] ^= 0x80000000;

  return u.ld;

}

#ifdef __LP64__

/* This routine is only necessary for the PA64 port; for reasons unknown

   _U_Qfcnvfxt_quad_to_sgl returns the integer in the high 32bits of the

   return value.  Ugh.  */

int

__U_Qfcnvfxt_quad_to_sgl (long double a)

{

  return _U_Qfcnvfxt_quad_to_sgl (a) >> 32;

}

#endif

/* HP only has signed conversion in library, so need to synthesize an

   unsigned version */

unsigned int

_U_Qfcnvfxt_quad_to_usgl(long double a)

{

  extern long long _U_Qfcnvfxt_quad_to_dbl (long double a);

  return (unsigned int) _U_Qfcnvfxt_quad_to_dbl (a);

}

/* HP only has signed conversion in library, so need to synthesize an

   unsigned version */

typedef union {

    long long unsigned int u[2];

    long double d[1];

} quad_type;

unsigned long long

_U_Qfcnvfxt_quad_to_udbl(long double a)

{

  extern quad_type _U_Qfcnvfxt_quad_to_quad (long double a);

  quad_type u;

  u = _U_Qfcnvfxt_quad_to_quad(a);

  return u.u[1];

}