1 /* Subroutines for long double support. 2 Copyright (C) 2000, 2002, 2004, 2005, 2006 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, 51 Franklin Street, Fifth Floor, 28 Boston, MA 02110-1301, USA. */ 29 30 /* HPUX TFmode compare requires a library call to _U_Qfcmp. It takes 31 a magic number as its third argument which indicates what to do. 32 The return value is an integer to be compared against zero. The 33 comparison conditions are the same as those listed in Table 8-12 34 of the PA-RISC 2.0 Architecture book for the fcmp instruction. */ 35 36 /* Raise FP_INVALID on SNaN as a side effect. */ 37 #define QCMP_INV 1 38 39 /* Comparison relations. */ 40 #define QCMP_UNORD 2 41 #define QCMP_EQ 4 42 #define QCMP_LT 8 43 #define QCMP_GT 16 44 45 int _U_Qfcmp (long double a, long double b, int); 46 long _U_Qfcnvfxt_quad_to_sgl (long double); 47 48 int _U_Qfeq (long double, long double); 49 int _U_Qfne (long double, long double); 50 int _U_Qfgt (long double, long double); 51 int _U_Qfge (long double, long double); 52 int _U_Qflt (long double, long double); 53 int _U_Qfle (long double, long double); 54 int _U_Qfltgt (long double, long double); 55 int _U_Qfunle (long double, long double); 56 int _U_Qfunlt (long double, long double); 57 int _U_Qfunge (long double, long double); 58 int _U_Qfungt (long double, long double); 59 int _U_Qfuneq (long double, long double); 60 int _U_Qfunord (long double, long double); 61 int _U_Qford (long double, long double); 62 63 int _U_Qfcomp (long double, long double); 64 65 long double _U_Qfneg (long double); 66 67 #ifdef __LP64__ 68 int __U_Qfcnvfxt_quad_to_sgl (long double); 69 #endif 70 unsigned int _U_Qfcnvfxt_quad_to_usgl(long double); 71 long double _U_Qfcnvxf_usgl_to_quad (unsigned int); 72 unsigned long long _U_Qfcnvfxt_quad_to_udbl(long double); 73 long double _U_Qfcnvxf_udbl_to_quad (unsigned long long); 74 75 int 76 _U_Qfeq (long double a, long double b) 77 { 78 return (_U_Qfcmp (a, b, QCMP_EQ) != 0); 79 } 80 81 int 82 _U_Qfne (long double a, long double b) 83 { 84 return (_U_Qfcmp (a, b, QCMP_EQ) == 0); 85 } 86 87 int 88 _U_Qfgt (long double a, long double b) 89 { 90 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_GT) != 0); 91 } 92 93 int 94 _U_Qfge (long double a, long double b) 95 { 96 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_GT) != 0); 97 } 98 99 int 100 _U_Qflt (long double a, long double b) 101 { 102 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT) != 0); 103 } 104 105 int 106 _U_Qfle (long double a, long double b) 107 { 108 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT) != 0); 109 } 110 111 int 112 _U_Qfltgt (long double a, long double b) 113 { 114 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_LT | QCMP_GT) != 0); 115 } 116 117 int 118 _U_Qfunle (long double a, long double b) 119 { 120 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_LT) != 0); 121 } 122 123 int 124 _U_Qfunlt (long double a, long double b) 125 { 126 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_LT) != 0); 127 } 128 129 int 130 _U_Qfunge (long double a, long double b) 131 { 132 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0); 133 } 134 135 int 136 _U_Qfungt (long double a, long double b) 137 { 138 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_GT) != 0); 139 } 140 141 int 142 _U_Qfuneq (long double a, long double b) 143 { 144 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD | QCMP_EQ) != 0); 145 } 146 147 int 148 _U_Qfunord (long double a, long double b) 149 { 150 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_UNORD) != 0); 151 } 152 153 int 154 _U_Qford (long double a, long double b) 155 { 156 return (_U_Qfcmp (a, b, QCMP_INV | QCMP_EQ | QCMP_LT | QCMP_GT) != 0); 157 } 158 159 int 160 _U_Qfcomp (long double a, long double b) 161 { 162 if (_U_Qfcmp (a, b, QCMP_EQ) == 0) 163 return 0; 164 165 return (_U_Qfcmp (a, b, QCMP_UNORD | QCMP_EQ | QCMP_GT) != 0 ? 1 : -1); 166 } 167 168 169 /* Negate long double A. */ 170 long double 171 _U_Qfneg (long double a) 172 { 173 union 174 { 175 long double ld; 176 int i[4]; 177 } u; 178 179 u.ld = a; 180 u.i[0] ^= 0x80000000; 181 return u.ld; 182 } 183 184 #ifdef __LP64__ 185 /* This routine is only necessary for the PA64 port; for reasons unknown 186 _U_Qfcnvfxt_quad_to_sgl returns the integer in the high 32bits of the 187 return value. Ugh. */ 188 int 189 __U_Qfcnvfxt_quad_to_sgl (long double a) 190 { 191 return _U_Qfcnvfxt_quad_to_sgl (a) >> 32; 192 } 193 #endif 194 195 /* HP only has signed conversion in the C library, so need to synthesize 196 unsigned versions. */ 197 unsigned int 198 _U_Qfcnvfxt_quad_to_usgl (long double a) 199 { 200 extern long long _U_Qfcnvfxt_quad_to_dbl (long double a); 201 return (unsigned int) _U_Qfcnvfxt_quad_to_dbl (a); 202 } 203 204 long double 205 _U_Qfcnvxf_usgl_to_quad (unsigned int a) 206 { 207 extern long double _U_Qfcnvxf_dbl_to_quad (long long); 208 return _U_Qfcnvxf_dbl_to_quad ((long long) a); 209 } 210 211 typedef union { 212 unsigned long long u[2]; 213 long double d[1]; 214 } quad_type; 215 216 unsigned long long 217 _U_Qfcnvfxt_quad_to_udbl (long double a) 218 { 219 extern quad_type _U_Qfcnvfxt_quad_to_quad (long double a); 220 quad_type u; 221 u = _U_Qfcnvfxt_quad_to_quad(a); 222 return u.u[1]; 223 } 224 225 long double 226 _U_Qfcnvxf_udbl_to_quad (unsigned long long a) 227 { 228 extern long double _U_Qfcnvxf_quad_to_quad (quad_type a); 229 quad_type u; 230 u.u[0] = 0; 231 u.u[1] = a; 232 return _U_Qfcnvxf_quad_to_quad (u); 233 } 234