1 /* sat_arithmetic.c -- Builtins for HSAIL saturating arithmetic instructions. 2 3 Copyright (C) 2015-2020 Free Software Foundation, Inc. 4 Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com> 5 for General Processor Tech. 6 7 Permission is hereby granted, free of charge, to any person obtaining a 8 copy of this software and associated documentation files 9 (the "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sublicense, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice shall be included 16 in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 #include <stdint.h> 28 29 uint8_t 30 __hsail_sat_add_u8 (uint8_t a, uint8_t b) 31 { 32 uint16_t c = (uint16_t) a + (uint16_t) b; 33 if (c > UINT8_MAX) 34 return UINT8_MAX; 35 else 36 return c; 37 } 38 39 uint16_t 40 __hsail_sat_add_u16 (uint16_t a, uint16_t b) 41 { 42 uint32_t c = (uint32_t) a + (uint32_t) b; 43 if (c > UINT16_MAX) 44 return UINT16_MAX; 45 else 46 return c; 47 } 48 49 uint32_t 50 __hsail_sat_add_u32 (uint32_t a, uint32_t b) 51 { 52 uint32_t c; 53 if (__builtin_add_overflow (a, b, &c)) 54 return UINT32_MAX; 55 return c; 56 } 57 58 uint64_t 59 __hsail_sat_add_u64 (uint64_t a, uint64_t b) 60 { 61 uint64_t c; 62 if (__builtin_add_overflow (a, b, &c)) 63 return UINT64_MAX; 64 return c; 65 } 66 67 int8_t 68 __hsail_sat_add_s8 (int8_t a, int8_t b) 69 { 70 int16_t c = (int16_t) a + (int16_t) b; 71 if (c > INT8_MAX) 72 return INT8_MAX; 73 else if (c < INT8_MIN) 74 return INT8_MIN; 75 else 76 return c; 77 } 78 79 int16_t 80 __hsail_sat_add_s16 (int16_t a, int16_t b) 81 { 82 int32_t c = (int32_t) a + (int32_t) b; 83 if (c > INT16_MAX) 84 return INT16_MAX; 85 else if (c < INT16_MIN) 86 return INT16_MIN; 87 else 88 return c; 89 } 90 91 int32_t 92 __hsail_sat_add_s32 (int32_t a, int32_t b) 93 { 94 int32_t c; 95 if (__builtin_add_overflow (a, b, &c)) 96 return b < 0 ? INT32_MIN : INT32_MAX; 97 return c; 98 } 99 100 int64_t 101 __hsail_sat_add_s64 (int64_t a, int64_t b) 102 { 103 int64_t c; 104 if (__builtin_add_overflow (a, b, &c)) 105 return b < 0 ? INT64_MIN : INT64_MAX; 106 return c; 107 } 108 109 uint8_t 110 __hsail_sat_sub_u8 (uint8_t a, uint8_t b) 111 { 112 int16_t c = (uint16_t) a - (uint16_t) b; 113 if (c < 0) 114 return 0; 115 else 116 return c; 117 } 118 119 uint16_t 120 __hsail_sat_sub_u16 (uint16_t a, uint16_t b) 121 { 122 int32_t c = (uint32_t) a - (uint32_t) b; 123 if (c < 0) 124 return 0; 125 else 126 return c; 127 } 128 129 uint32_t 130 __hsail_sat_sub_u32 (uint32_t a, uint32_t b) 131 { 132 uint32_t c; 133 if (__builtin_sub_overflow (a, b, &c)) 134 return 0; 135 return c; 136 } 137 138 uint64_t 139 __hsail_sat_sub_u64 (uint64_t a, uint64_t b) 140 { 141 uint64_t c; 142 if (__builtin_sub_overflow (a, b, &c)) 143 return 0; 144 return c; 145 } 146 147 int8_t 148 __hsail_sat_sub_s8 (int8_t a, int8_t b) 149 { 150 int16_t c = (int16_t) a - (int16_t) b; 151 if (c > INT8_MAX) 152 return INT8_MAX; 153 else if (c < INT8_MIN) 154 return INT8_MIN; 155 else 156 return c; 157 } 158 159 int16_t 160 __hsail_sat_sub_s16 (int16_t a, int16_t b) 161 { 162 int32_t c = (int32_t) a - (int32_t) b; 163 if (c > INT16_MAX) 164 return INT16_MAX; 165 else if (c < INT16_MIN) 166 return INT16_MIN; 167 else 168 return c; 169 } 170 171 int32_t 172 __hsail_sat_sub_s32 (int32_t a, int32_t b) 173 { 174 int32_t c; 175 if (__builtin_sub_overflow (a, b, &c)) 176 return b < 0 ? INT32_MAX : INT32_MIN; 177 return c; 178 } 179 180 int64_t 181 __hsail_sat_sub_s64 (int64_t a, int64_t b) 182 { 183 int64_t c; 184 if (__builtin_sub_overflow (a, b, &c)) 185 return b < 0 ? INT64_MAX : INT64_MIN; 186 return c; 187 } 188 189 uint8_t 190 __hsail_sat_mul_u8 (uint8_t a, uint8_t b) 191 { 192 uint16_t c = (uint16_t) a * (uint16_t) b; 193 if (c > UINT8_MAX) 194 return UINT8_MAX; 195 else 196 return c; 197 } 198 199 uint16_t 200 __hsail_sat_mul_u16 (uint16_t a, uint16_t b) 201 { 202 uint32_t c = (uint32_t) a * (uint32_t) b; 203 if (c > UINT16_MAX) 204 return UINT16_MAX; 205 else 206 return c; 207 } 208 209 uint32_t 210 __hsail_sat_mul_u32 (uint32_t a, uint32_t b) 211 { 212 uint32_t c; 213 if (__builtin_mul_overflow (a, b, &c)) 214 return UINT32_MAX; 215 return c; 216 } 217 218 uint64_t 219 __hsail_sat_mul_u64 (uint64_t a, uint64_t b) 220 { 221 uint64_t c; 222 if (__builtin_mul_overflow (a, b, &c)) 223 return UINT64_MAX; 224 return c; 225 } 226 227 int8_t 228 __hsail_sat_mul_s8 (int8_t a, int8_t b) 229 { 230 int16_t c = (int16_t) a * (int16_t) b; 231 if (c > INT8_MAX) 232 return INT8_MAX; 233 else if (c < INT8_MIN) 234 return INT8_MIN; 235 else 236 return c; 237 } 238 239 int16_t 240 __hsail_sat_mul_s16 (int16_t a, int16_t b) 241 { 242 int32_t c = (int32_t) a * (int32_t) b; 243 if (c > INT16_MAX) 244 return INT16_MAX; 245 else if (c < INT16_MIN) 246 return INT16_MIN; 247 else 248 return c; 249 } 250 251 int32_t 252 __hsail_sat_mul_s32 (int32_t a, int32_t b) 253 { 254 int32_t c; 255 if (__builtin_mul_overflow (a, b, &c)) 256 return ((a > 0) ^ (b > 0)) ? INT32_MIN : INT32_MAX; 257 return c; 258 } 259 260 int64_t 261 __hsail_sat_mul_s64 (int64_t a, int64_t b) 262 { 263 int64_t c; 264 if (__builtin_mul_overflow (a, b, &c)) 265 return ((a > 0) ^ (b > 0)) ? INT64_MIN : INT64_MAX; 266 return c; 267 } 268