gcc/config/pa/quadlib.c

   1 /* Subroutines for long double support.
   2    Copyright (C) 2000, 2002, 2004, 2005, 2006, 2009 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 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 /* HPUX TFmode compare requires a library call to _U_Qfcmp.  It takes
  26    a magic number as its third argument which indicates what to do.
  27    The return value is an integer to be compared against zero.  The
  28    comparison conditions are the same as those listed in Table 8-12
  29    of the PA-RISC 2.0 Architecture book for the fcmp instruction.  */
  30
  31 /* Raise FP_INVALID on SNaN as a side effect.  */
  32 #define QCMP_INV 1
  33
  34 /* Comparison relations.  */
  35 #define QCMP_UNORD 2
  36 #define QCMP_EQ 4
  37 #define QCMP_LT 8
  38 #define QCMP_GT 16
  39
  40 int _U_Qfcmp (long double a, long double b, int);
  41 long _U_Qfcnvfxt_quad_to_sgl (long double);
  42
  43 int _U_Qfeq (long double, long double);
  44 int _U_Qfne (long double, long double);
  45 int _U_Qfgt (long double, long double);
  46 int _U_Qfge (long double, long double);
  47 int _U_Qflt (long double, long double);
  48 int _U_Qfle (long double, long double);
  49 int _U_Qfltgt (long double, long double);
  50 int _U_Qfunle (long double, long double);
  51 int _U_Qfunlt (long double, long double);
  52 int _U_Qfunge (long double, long double);
  53 int _U_Qfungt (long double, long double);
  54 int _U_Qfuneq (long double, long double);
  55 int _U_Qfunord (long double, long double);
  56 int _U_Qford (long double, long double);
  57
  58 int _U_Qfcomp (long double, long double);
  59
  60 long double _U_Qfneg (long double);
  61
  62 #ifdef __LP64__
  63 int __U_Qfcnvfxt_quad_to_sgl (long double);
  64 #endif
  65 unsigned int _U_Qfcnvfxt_quad_to_usgl(long double);
  66 long double _U_Qfcnvxf_usgl_to_quad (unsigned int);
  67 unsigned long long _U_Qfcnvfxt_quad_to_udbl(long double);
  68 long double _U_Qfcnvxf_udbl_to_quad (unsigned long long);
  69
  70 int
  71 _U_Qfeq (long double a, long double b)
  72 {
  73   return (_U_Qfcmp (a, b, QCMP_EQ) != 0);
  74 }
  75
  76 int
  77 _U_Qfne (long double a, long double b)
  78 {
  79   return (_U_Qfcmp (a, b, QCMP_EQ) == 0);
  80 }
  81
  82 int
  83 _U_Qfgt (long double a, long double b)
  84 {
  85   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_GT) != 0);
  86 }
  87
  88 int
  89 _U_Qfge (long double a, long double b)
  90 {
  91   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_GT) != 0);
  92 }
  93
  94 int
  95 _U_Qflt (long double a, long double b)
  96 {
  97   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT) != 0);
  98 }
  99
 100 int
 101 _U_Qfle (long double a, long double b)
 102 {
 103   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT) != 0);
 104 }
 105
 106 int
 107 _U_Qfltgt (long double a, long double b)
 108 {
 109   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT | QCMP_GT) != 0);
 110 }
 111
 112 int
 113 _U_Qfunle (long double a, long double b)
 114 {
 115   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_LT) != 0);
 116 }
 117
 118 int
 119 _U_Qfunlt (long double a, long double b)
 120 {
 121   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_LT) != 0);
 122 }
 123
 124 int
 125 _U_Qfunge (long double a, long double b)
 126 {
 127   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0);
 128 }
 129
 130 int
 131 _U_Qfungt (long double a, long double b)
 132 {
 133   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_GT) != 0);
 134 }
 135
 136 int
 137 _U_Qfuneq (long double a, long double b)
 138 {
 139   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ) != 0);
 140 }
 141
 142 int
 143 _U_Qfunord (long double a, long double b)
 144 {
 145   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD) != 0);
 146 }
 147
 148 int
 149 _U_Qford (long double a, long double b)
 150 {
 151   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT | QCMP_GT) != 0);
 152 }
 153
 154 int
 155 _U_Qfcomp (long double a, long double b)
 156 {
 157   if (_U_Qfcmp (a, b, QCMP_EQ) == 0)
 158     return 0;
 159
 160   return (_U_Qfcmp (a, b, QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0 ? 1 : -1);
 161 }
 162
 163
 164 /* Negate long double A.  */
 165 long double
 166 _U_Qfneg (long double a)
 167 {
 168   union
 169    {
 170      long double ld;
 171      int i[4];
 172    } u;
 173
 174   u.ld = a;
 175   u.i[0] ^= 0x80000000;
 176   return u.ld;
 177 }
 178
 179 #ifdef __LP64__
 180 /* This routine is only necessary for the PA64 port; for reasons unknown
 181    _U_Qfcnvfxt_quad_to_sgl returns the integer in the high 32bits of the
 182    return value.  Ugh.  */
 183 int
 184 __U_Qfcnvfxt_quad_to_sgl (long double a)
 185 {
 186   return _U_Qfcnvfxt_quad_to_sgl (a) >> 32;
 187 }
 188 #endif
 189
 190 /* HP only has signed conversion in the C library, so need to synthesize
 191    unsigned versions.  */
 192 unsigned int
 193 _U_Qfcnvfxt_quad_to_usgl (long double a)
 194 {
 195   extern long long _U_Qfcnvfxt_quad_to_dbl (long double a);
 196   return (unsigned int) _U_Qfcnvfxt_quad_to_dbl (a);
 197 }
 198
 199 long double
 200 _U_Qfcnvxf_usgl_to_quad (unsigned int a)
 201 {
 202   extern long double _U_Qfcnvxf_dbl_to_quad (long long);
 203   return _U_Qfcnvxf_dbl_to_quad ((long long) a);
 204 }
 205
 206 typedef union {
 207     unsigned long long u[2];
 208     long double d[1];
 209 } quad_type;
 210
 211 unsigned long long
 212 _U_Qfcnvfxt_quad_to_udbl (long double a)
 213 {
 214   extern quad_type _U_Qfcnvfxt_quad_to_quad (long double a);
 215   quad_type u;
 216   u = _U_Qfcnvfxt_quad_to_quad(a);
 217   return u.u[1];
 218 }
 219
 220 long double
 221 _U_Qfcnvxf_udbl_to_quad (unsigned long long a)
 222 {
 223   extern long double _U_Qfcnvxf_quad_to_quad (quad_type a);
 224   quad_type u;
 225   u.u[0] = 0;
 226   u.u[1] = a;
 227   return _U_Qfcnvxf_quad_to_quad (u);
 228 }