gcc/config/pa/quadlib.c

   1 /* Subroutines for long double support.
   2    Copyright (C) 2000, 2002, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 In addition to the permissions in the GNU General Public License, the
  12 Free Software Foundation gives you unlimited permission to link the
  13 compiled version of this file into combinations with other programs,
  14 and to distribute those combinations without any restriction coming
  15 from the use of this file.  (The General Public License restrictions
  16 do apply in other respects; for example, they cover modification of
  17 the file, and distribution when not linked into a combine
  18 executable.)
  19
  20 GCC is distributed in the hope that it will be useful,
  21 but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 GNU General Public License for more details.
  24
  25 You should have received a copy of the GNU General Public License
  26 along with GCC; see the file COPYING.  If not, write to
  27 the Free Software Foundation, 59 Temple Place - Suite 330,
  28 Boston, MA 02111-1307, USA.  */
  29
  30 /* HPUX TFmode compare requires a library call to _U_Qfcmp, which takes a
  31    magic number as its third argument, that indicates what to do.
  32    The return value is an integer to be compared against zero.  */
  33 enum qfcmp_magic {
  34   QCMP_INV = 1,         /* Raise FP_INVALID on SNaN as a side effect.  */
  35   QCMP_UNORD = 2,
  36   QCMP_EQ = 4,
  37   QCMP_LT = 8,
  38   QCMP_GT = 16
  39 } magic;
  40
  41 int _U_Qfcmp (long double a, long double b, int);
  42 long _U_Qfcnvfxt_quad_to_sgl (long double);
  43
  44 int _U_Qfeq (long double, long double);
  45 int _U_Qfne (long double, long double);
  46 int _U_Qfgt (long double, long double);
  47 int _U_Qfge (long double, long double);
  48 int _U_Qflt (long double, long double);
  49 int _U_Qfle (long double, long double);
  50 int _U_Qfltgt (long double, long double);
  51 int _U_Qfunle (long double, long double);
  52 int _U_Qfunlt (long double, long double);
  53 int _U_Qfunge (long double, long double);
  54 int _U_Qfungt (long double, long double);
  55 int _U_Qfuneq (long double, long double);
  56 int _U_Qfunord (long double, long double);
  57 int _U_Qford (long double, long double);
  58
  59 int _U_Qfcomp (long double, long double);
  60
  61 long double _U_Qfneg (long double);
  62
  63 #ifdef __LP64__
  64 int __U_Qfcnvfxt_quad_to_sgl (long double);
  65 #endif
  66 unsigned int _U_Qfcnvfxt_quad_to_usgl(long double);
  67 unsigned long long _U_Qfcnvfxt_quad_to_udbl(long double);
  68
  69 int
  70 _U_Qfeq (long double a, long double b)
  71 {
  72   return (_U_Qfcmp (a, b, QCMP_EQ) != 0);
  73 }
  74
  75 int
  76 _U_Qfne (long double a, long double b)
  77 {
  78   return (_U_Qfcmp (a, b, QCMP_EQ) == 0);
  79 }
  80
  81 int
  82 _U_Qfgt (long double a, long double b)
  83 {
  84   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_GT) != 0);
  85 }
  86
  87 int
  88 _U_Qfge (long double a, long double b)
  89 {
  90   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_GT) != 0);
  91 }
  92
  93 int
  94 _U_Qflt (long double a, long double b)
  95 {
  96   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT) != 0);
  97 }
  98
  99 int
 100 _U_Qfle (long double a, long double b)
 101 {
 102   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT) != 0);
 103 }
 104
 105 int
 106 _U_Qfltgt (long double a, long double b)
 107 {
 108   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT | QCMP_GT) != 0);
 109 }
 110
 111 int
 112 _U_Qfunle (long double a, long double b)
 113 {
 114   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_LT) != 0);
 115 }
 116
 117 int
 118 _U_Qfunlt (long double a, long double b)
 119 {
 120   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_LT) != 0);
 121 }
 122
 123 int
 124 _U_Qfunge (long double a, long double b)
 125 {
 126   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0);
 127 }
 128
 129 int
 130 _U_Qfungt (long double a, long double b)
 131 {
 132   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_GT) != 0);
 133 }
 134
 135 int
 136 _U_Qfuneq (long double a, long double b)
 137 {
 138   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ) != 0);
 139 }
 140
 141 int
 142 _U_Qfunord (long double a, long double b)
 143 {
 144   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD) != 0);
 145 }
 146
 147 int
 148 _U_Qford (long double a, long double b)
 149 {
 150   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT | QCMP_GT) != 0);
 151 }
 152
 153 int
 154 _U_Qfcomp (long double a, long double b)
 155 {
 156   if (_U_Qfcmp (a, b, QCMP_EQ) == 0)
 157     return 0;
 158
 159   return (_U_Qfcmp (a, b, QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0 ? 1 : -1);
 160 }
 161
 162
 163 /* This violates the IEEE standard.  It is better to multiply by -1.0L.  */
 164 long double
 165 _U_Qfneg (long double a)
 166 {
 167   return (0.0L - a);
 168 }
 169
 170 #ifdef __LP64__
 171 /* This routine is only necessary for the PA64 port; for reasons unknown
 172    _U_Qfcnvfxt_quad_to_sgl returns the integer in the high 32bits of the
 173    return value.  Ugh.  */
 174 int
 175 __U_Qfcnvfxt_quad_to_sgl (long double a)
 176 {
 177   return _U_Qfcnvfxt_quad_to_sgl (a) >> 32;
 178 }
 179 #endif
 180
 181 /* HP only has signed conversion in library, so need to synthesize an
 182    unsigned version */
 183 unsigned int
 184 _U_Qfcnvfxt_quad_to_usgl(long double a)
 185 {
 186   extern long long _U_Qfcnvfxt_quad_to_dbl (long double a);
 187   return (unsigned int) _U_Qfcnvfxt_quad_to_dbl (a);
 188 }
 189
 190 /* HP only has signed conversion in library, so need to synthesize an
 191    unsigned version */
 192 typedef union {
 193     long long unsigned int u[2];
 194     long double d[1];
 195 } quad_type;
 196
 197 unsigned long long
 198 _U_Qfcnvfxt_quad_to_udbl(long double a)
 199 {
 200   extern quad_type _U_Qfcnvfxt_quad_to_quad (long double a);
 201   quad_type u;
 202   u = _U_Qfcnvfxt_quad_to_quad(a);
 203   return u.u[1];
 204 }