1 /* Functions needed for soft-float on powerpc64-linux, copied from 2 libgcc2.c with macros expanded to force the use of specific types. 3 4 Copyright (C) 1989-2020 Free Software Foundation, Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 Under Section 7 of GPL version 3, you are granted additional 19 permissions described in the GCC Runtime Library Exception, version 20 3.1, as published by the Free Software Foundation. 21 22 You should have received a copy of the GNU General Public License and 23 a copy of the GCC Runtime Library Exception along with this program; 24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 <http://www.gnu.org/licenses/>. */ 26 27 #if defined(__powerpc64__) || defined (__64BIT__) || defined(__ppc64__) 28 #define TMODES 29 #include "fp-bit.h" 30 31 extern DItype __fixtfdi (TFtype); 32 extern DItype __fixdfdi (DFtype); 33 extern DItype __fixsfdi (SFtype); 34 extern USItype __fixunsdfsi (DFtype); 35 extern USItype __fixunssfsi (SFtype); 36 extern TFtype __floatditf (DItype); 37 extern TFtype __floatunditf (UDItype); 38 extern DFtype __floatdidf (DItype); 39 extern DFtype __floatundidf (UDItype); 40 extern SFtype __floatdisf (DItype); 41 extern SFtype __floatundisf (UDItype); 42 extern DItype __fixunstfdi (TFtype); 43 44 static DItype local_fixunssfdi (SFtype); 45 static DItype local_fixunsdfdi (DFtype); 46 47 DItype 48 __fixtfdi (TFtype a) 49 { 50 if (a < 0) 51 return - __fixunstfdi (-a); 52 return __fixunstfdi (a); 53 } 54 55 DItype 56 __fixdfdi (DFtype a) 57 { 58 if (a < 0) 59 return - local_fixunsdfdi (-a); 60 return local_fixunsdfdi (a); 61 } 62 63 DItype 64 __fixsfdi (SFtype a) 65 { 66 if (a < 0) 67 return - local_fixunssfdi (-a); 68 return local_fixunssfdi (a); 69 } 70 71 USItype 72 __fixunsdfsi (DFtype a) 73 { 74 if (a >= - (DFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) 75 return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) 76 - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1); 77 return (SItype) a; 78 } 79 80 USItype 81 __fixunssfsi (SFtype a) 82 { 83 if (a >= - (SFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) 84 return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1)) 85 - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1); 86 return (SItype) a; 87 } 88 89 TFtype 90 __floatditf (DItype u) 91 { 92 DFtype dh, dl; 93 94 dh = (SItype) (u >> (sizeof (SItype) * 8)); 95 dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 96 dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 97 98 return (TFtype) dh + (TFtype) dl; 99 } 100 101 TFtype 102 __floatunditf (UDItype u) 103 { 104 DFtype dh, dl; 105 106 dh = (USItype) (u >> (sizeof (SItype) * 8)); 107 dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 108 dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 109 110 return (TFtype) dh + (TFtype) dl; 111 } 112 113 DFtype 114 __floatdidf (DItype u) 115 { 116 DFtype d; 117 118 d = (SItype) (u >> (sizeof (SItype) * 8)); 119 d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 120 d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 121 122 return d; 123 } 124 125 DFtype 126 __floatundidf (UDItype u) 127 { 128 DFtype d; 129 130 d = (USItype) (u >> (sizeof (SItype) * 8)); 131 d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 132 d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 133 134 return d; 135 } 136 137 SFtype 138 __floatdisf (DItype u) 139 { 140 DFtype f; 141 142 if (53 < (sizeof (DItype) * 8) 143 && 53 > ((sizeof (DItype) * 8) - 53 + 24)) 144 { 145 if (! (- ((DItype) 1 << 53) < u 146 && u < ((DItype) 1 << 53))) 147 { 148 if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1)) 149 { 150 u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1); 151 u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53)); 152 } 153 } 154 } 155 f = (SItype) (u >> (sizeof (SItype) * 8)); 156 f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 157 f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 158 159 return (SFtype) f; 160 } 161 162 SFtype 163 __floatundisf (UDItype u) 164 { 165 DFtype f; 166 167 if (53 < (sizeof (DItype) * 8) 168 && 53 > ((sizeof (DItype) * 8) - 53 + 24)) 169 { 170 if (u >= ((UDItype) 1 << 53)) 171 { 172 if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1)) 173 { 174 u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1); 175 u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53)); 176 } 177 } 178 } 179 f = (USItype) (u >> (sizeof (SItype) * 8)); 180 f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1)); 181 f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1)); 182 183 return (SFtype) f; 184 } 185 186 DItype 187 __fixunstfdi (TFtype a) 188 { 189 if (a < 0) 190 return 0; 191 192 /* Compute high word of result, as a flonum. */ 193 const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8))); 194 /* Convert that to fixed (but not to DItype!), 195 and shift it into the high word. */ 196 UDItype v = (USItype) b; 197 v <<= (sizeof (SItype) * 8); 198 /* Remove high part from the TFtype, leaving the low part as flonum. */ 199 a -= (TFtype) v; 200 /* Convert that to fixed (but not to DItype!) and add it in. 201 Sometimes A comes out negative. This is significant, since 202 A has more bits than a long int does. */ 203 if (a < 0) 204 v -= (USItype) (-a); 205 else 206 v += (USItype) a; 207 return v; 208 } 209 210 /* This version is needed to prevent recursion; fixunsdfdi in libgcc 211 calls fixdfdi, which in turn calls calls fixunsdfdi. */ 212 213 static DItype 214 local_fixunsdfdi (DFtype a) 215 { 216 USItype hi, lo; 217 218 hi = a / (((UDItype) 1) << (sizeof (SItype) * 8)); 219 lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8))); 220 return ((UDItype) hi << (sizeof (SItype) * 8)) | lo; 221 } 222 223 /* This version is needed to prevent recursion; fixunssfdi in libgcc 224 calls fixsfdi, which in turn calls calls fixunssfdi. */ 225 226 static DItype 227 local_fixunssfdi (SFtype original_a) 228 { 229 DFtype a = original_a; 230 USItype hi, lo; 231 232 hi = a / (((UDItype) 1) << (sizeof (SItype) * 8)); 233 lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8))); 234 return ((UDItype) hi << (sizeof (SItype) * 8)) | lo; 235 } 236 237 #endif /* __powerpc64__ */ 238