libgcc/config/pa/quadlib.c

   1 /* Subroutines for long double support.
   2    Copyright (C) 2000-2018 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 long double _U_Qfcopysign (long double, 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 long double _U_Qfcnvxf_usgl_to_quad (unsigned int);
  68 unsigned long long _U_Qfcnvfxt_quad_to_udbl(long double);
  69 long double _U_Qfcnvxf_udbl_to_quad (unsigned long long);
  70
  71 int
  72 _U_Qfeq (long double a, long double b)
  73 {
  74   return (_U_Qfcmp (a, b, QCMP_EQ) != 0);
  75 }
  76
  77 int
  78 _U_Qfne (long double a, long double b)
  79 {
  80   return (_U_Qfcmp (a, b, QCMP_EQ) == 0);
  81 }
  82
  83 int
  84 _U_Qfgt (long double a, long double b)
  85 {
  86   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_GT) != 0);
  87 }
  88
  89 int
  90 _U_Qfge (long double a, long double b)
  91 {
  92   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_GT) != 0);
  93 }
  94
  95 int
  96 _U_Qflt (long double a, long double b)
  97 {
  98   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT) != 0);
  99 }
 100
 101 int
 102 _U_Qfle (long double a, long double b)
 103 {
 104   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT) != 0);
 105 }
 106
 107 int
 108 _U_Qfltgt (long double a, long double b)
 109 {
 110   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT | QCMP_GT) != 0);
 111 }
 112
 113 int
 114 _U_Qfunle (long double a, long double b)
 115 {
 116   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_LT) != 0);
 117 }
 118
 119 int
 120 _U_Qfunlt (long double a, long double b)
 121 {
 122   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_LT) != 0);
 123 }
 124
 125 int
 126 _U_Qfunge (long double a, long double b)
 127 {
 128   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0);
 129 }
 130
 131 int
 132 _U_Qfungt (long double a, long double b)
 133 {
 134   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_GT) != 0);
 135 }
 136
 137 int
 138 _U_Qfuneq (long double a, long double b)
 139 {
 140   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ) != 0);
 141 }
 142
 143 int
 144 _U_Qfunord (long double a, long double b)
 145 {
 146   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD) != 0);
 147 }
 148
 149 int
 150 _U_Qford (long double a, long double b)
 151 {
 152   return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT | QCMP_GT) != 0);
 153 }
 154
 155 int
 156 _U_Qfcomp (long double a, long double b)
 157 {
 158   if (_U_Qfcmp (a, b, QCMP_EQ) == 0)
 159     return 0;
 160
 161   return (_U_Qfcmp (a, b, QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0 ? 1 : -1);
 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 /* Return long double A with sign changed to sign of long double B.  */
 180 long double
 181 _U_Qfcopysign (long double a, long double b)
 182 {
 183   union
 184    {
 185      long double ld;
 186      int i[4];
 187    } ua, ub;
 188
 189   ua.ld = a;
 190   ub.ld = b;
 191   ua.i[0] &= 0x7fffffff;
 192   ua.i[0] |= (0x80000000 & ub.i[0]);
 193   return ua.ld;
 194 }
 195
 196 #ifdef __LP64__
 197 /* This routine is only necessary for the PA64 port; for reasons unknown
 198    _U_Qfcnvfxt_quad_to_sgl returns the integer in the high 32bits of the
 199    return value.  Ugh.  */
 200 int
 201 __U_Qfcnvfxt_quad_to_sgl (long double a)
 202 {
 203   return _U_Qfcnvfxt_quad_to_sgl (a) >> 32;
 204 }
 205 #endif
 206
 207 /* HP only has signed conversion in the C library, so need to synthesize
 208    unsigned versions.  */
 209 unsigned int
 210 _U_Qfcnvfxt_quad_to_usgl (long double a)
 211 {
 212   extern long long _U_Qfcnvfxt_quad_to_dbl (long double a);
 213   return (unsigned int) _U_Qfcnvfxt_quad_to_dbl (a);
 214 }
 215
 216 long double
 217 _U_Qfcnvxf_usgl_to_quad (unsigned int a)
 218 {
 219   extern long double _U_Qfcnvxf_dbl_to_quad (long long);
 220   return _U_Qfcnvxf_dbl_to_quad ((long long) a);
 221 }
 222
 223 typedef union {
 224     unsigned long long u[2];
 225     long double d[1];
 226 } quad_type;
 227
 228 unsigned long long
 229 _U_Qfcnvfxt_quad_to_udbl (long double a)
 230 {
 231   extern quad_type _U_Qfcnvfxt_quad_to_quad (long double a);
 232   quad_type u;
 233   u = _U_Qfcnvfxt_quad_to_quad(a);
 234   return u.u[1];
 235 }
 236
 237 long double
 238 _U_Qfcnvxf_udbl_to_quad (unsigned long long a)
 239 {
 240   extern long double _U_Qfcnvxf_quad_to_quad (quad_type a);
 241   quad_type u;
 242   u.u[0] = 0;
 243   u.u[1] = a;
 244   return _U_Qfcnvxf_quad_to_quad (u);
 245 }