Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 1 | /*===-- __clang_cuda_complex_builtins - CUDA impls of runtime complex fns ---=== |
| 2 | * |
| 3 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | * See https://llvm.org/LICENSE.txt for license information. |
| 5 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | * |
| 7 | *===-----------------------------------------------------------------------=== |
| 8 | */ |
| 9 | |
| 10 | #ifndef __CLANG_CUDA_COMPLEX_BUILTINS |
| 11 | #define __CLANG_CUDA_COMPLEX_BUILTINS |
| 12 | |
| 13 | // This header defines __muldc3, __mulsc3, __divdc3, and __divsc3. These are |
| 14 | // libgcc functions that clang assumes are available when compiling c99 complex |
| 15 | // operations. (These implementations come from libc++, and have been modified |
| 16 | // to work with CUDA and OpenMP target offloading [in C and C++ mode].) |
| 17 | |
| 18 | #pragma push_macro("__DEVICE__") |
Pirama Arumuga Nainar | 494f645 | 2021-12-02 10:42:14 -0800 | [diff] [blame] | 19 | #if defined(__OPENMP_NVPTX__) || defined(__OPENMP_AMDGCN__) |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 20 | #pragma omp declare target |
| 21 | #define __DEVICE__ __attribute__((noinline, nothrow, cold, weak)) |
| 22 | #else |
| 23 | #define __DEVICE__ __device__ inline |
| 24 | #endif |
| 25 | |
| 26 | // To make the algorithms available for C and C++ in CUDA and OpenMP we select |
| 27 | // different but equivalent function versions. TODO: For OpenMP we currently |
| 28 | // select the native builtins as the overload support for templates is lacking. |
Pirama Arumuga Nainar | 494f645 | 2021-12-02 10:42:14 -0800 | [diff] [blame] | 29 | #if !defined(__OPENMP_NVPTX__) && !defined(__OPENMP_AMDGCN__) |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 30 | #define _ISNANd std::isnan |
| 31 | #define _ISNANf std::isnan |
| 32 | #define _ISINFd std::isinf |
| 33 | #define _ISINFf std::isinf |
| 34 | #define _ISFINITEd std::isfinite |
| 35 | #define _ISFINITEf std::isfinite |
| 36 | #define _COPYSIGNd std::copysign |
| 37 | #define _COPYSIGNf std::copysign |
| 38 | #define _SCALBNd std::scalbn |
| 39 | #define _SCALBNf std::scalbn |
| 40 | #define _ABSd std::abs |
| 41 | #define _ABSf std::abs |
| 42 | #define _LOGBd std::logb |
| 43 | #define _LOGBf std::logb |
Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 44 | // Rather than pulling in std::max from algorithm everytime, use available ::max. |
| 45 | #define _fmaxd max |
| 46 | #define _fmaxf max |
| 47 | #else |
| 48 | #ifdef __AMDGCN__ |
| 49 | #define _ISNANd __ocml_isnan_f64 |
| 50 | #define _ISNANf __ocml_isnan_f32 |
| 51 | #define _ISINFd __ocml_isinf_f64 |
| 52 | #define _ISINFf __ocml_isinf_f32 |
| 53 | #define _ISFINITEd __ocml_isfinite_f64 |
| 54 | #define _ISFINITEf __ocml_isfinite_f32 |
| 55 | #define _COPYSIGNd __ocml_copysign_f64 |
| 56 | #define _COPYSIGNf __ocml_copysign_f32 |
| 57 | #define _SCALBNd __ocml_scalbn_f64 |
| 58 | #define _SCALBNf __ocml_scalbn_f32 |
| 59 | #define _ABSd __ocml_fabs_f64 |
| 60 | #define _ABSf __ocml_fabs_f32 |
| 61 | #define _LOGBd __ocml_logb_f64 |
| 62 | #define _LOGBf __ocml_logb_f32 |
| 63 | #define _fmaxd __ocml_fmax_f64 |
| 64 | #define _fmaxf __ocml_fmax_f32 |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 65 | #else |
| 66 | #define _ISNANd __nv_isnand |
| 67 | #define _ISNANf __nv_isnanf |
| 68 | #define _ISINFd __nv_isinfd |
| 69 | #define _ISINFf __nv_isinff |
| 70 | #define _ISFINITEd __nv_isfinited |
| 71 | #define _ISFINITEf __nv_finitef |
| 72 | #define _COPYSIGNd __nv_copysign |
| 73 | #define _COPYSIGNf __nv_copysignf |
| 74 | #define _SCALBNd __nv_scalbn |
| 75 | #define _SCALBNf __nv_scalbnf |
| 76 | #define _ABSd __nv_fabs |
| 77 | #define _ABSf __nv_fabsf |
| 78 | #define _LOGBd __nv_logb |
| 79 | #define _LOGBf __nv_logbf |
Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 80 | #define _fmaxd __nv_fmax |
| 81 | #define _fmaxf __nv_fmaxf |
| 82 | #endif |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 83 | #endif |
| 84 | |
| 85 | #if defined(__cplusplus) |
| 86 | extern "C" { |
| 87 | #endif |
| 88 | |
| 89 | __DEVICE__ double _Complex __muldc3(double __a, double __b, double __c, |
| 90 | double __d) { |
| 91 | double __ac = __a * __c; |
| 92 | double __bd = __b * __d; |
| 93 | double __ad = __a * __d; |
| 94 | double __bc = __b * __c; |
| 95 | double _Complex z; |
| 96 | __real__(z) = __ac - __bd; |
| 97 | __imag__(z) = __ad + __bc; |
| 98 | if (_ISNANd(__real__(z)) && _ISNANd(__imag__(z))) { |
| 99 | int __recalc = 0; |
| 100 | if (_ISINFd(__a) || _ISINFd(__b)) { |
| 101 | __a = _COPYSIGNd(_ISINFd(__a) ? 1 : 0, __a); |
| 102 | __b = _COPYSIGNd(_ISINFd(__b) ? 1 : 0, __b); |
| 103 | if (_ISNANd(__c)) |
| 104 | __c = _COPYSIGNd(0, __c); |
| 105 | if (_ISNANd(__d)) |
| 106 | __d = _COPYSIGNd(0, __d); |
| 107 | __recalc = 1; |
| 108 | } |
| 109 | if (_ISINFd(__c) || _ISINFd(__d)) { |
| 110 | __c = _COPYSIGNd(_ISINFd(__c) ? 1 : 0, __c); |
| 111 | __d = _COPYSIGNd(_ISINFd(__d) ? 1 : 0, __d); |
| 112 | if (_ISNANd(__a)) |
| 113 | __a = _COPYSIGNd(0, __a); |
| 114 | if (_ISNANd(__b)) |
| 115 | __b = _COPYSIGNd(0, __b); |
| 116 | __recalc = 1; |
| 117 | } |
| 118 | if (!__recalc && |
| 119 | (_ISINFd(__ac) || _ISINFd(__bd) || _ISINFd(__ad) || _ISINFd(__bc))) { |
| 120 | if (_ISNANd(__a)) |
| 121 | __a = _COPYSIGNd(0, __a); |
| 122 | if (_ISNANd(__b)) |
| 123 | __b = _COPYSIGNd(0, __b); |
| 124 | if (_ISNANd(__c)) |
| 125 | __c = _COPYSIGNd(0, __c); |
| 126 | if (_ISNANd(__d)) |
| 127 | __d = _COPYSIGNd(0, __d); |
| 128 | __recalc = 1; |
| 129 | } |
| 130 | if (__recalc) { |
| 131 | // Can't use std::numeric_limits<double>::infinity() -- that doesn't have |
| 132 | // a device overload (and isn't constexpr before C++11, naturally). |
| 133 | __real__(z) = __builtin_huge_val() * (__a * __c - __b * __d); |
| 134 | __imag__(z) = __builtin_huge_val() * (__a * __d + __b * __c); |
| 135 | } |
| 136 | } |
| 137 | return z; |
| 138 | } |
| 139 | |
| 140 | __DEVICE__ float _Complex __mulsc3(float __a, float __b, float __c, float __d) { |
| 141 | float __ac = __a * __c; |
| 142 | float __bd = __b * __d; |
| 143 | float __ad = __a * __d; |
| 144 | float __bc = __b * __c; |
| 145 | float _Complex z; |
| 146 | __real__(z) = __ac - __bd; |
| 147 | __imag__(z) = __ad + __bc; |
| 148 | if (_ISNANf(__real__(z)) && _ISNANf(__imag__(z))) { |
| 149 | int __recalc = 0; |
| 150 | if (_ISINFf(__a) || _ISINFf(__b)) { |
| 151 | __a = _COPYSIGNf(_ISINFf(__a) ? 1 : 0, __a); |
| 152 | __b = _COPYSIGNf(_ISINFf(__b) ? 1 : 0, __b); |
| 153 | if (_ISNANf(__c)) |
| 154 | __c = _COPYSIGNf(0, __c); |
| 155 | if (_ISNANf(__d)) |
| 156 | __d = _COPYSIGNf(0, __d); |
| 157 | __recalc = 1; |
| 158 | } |
| 159 | if (_ISINFf(__c) || _ISINFf(__d)) { |
| 160 | __c = _COPYSIGNf(_ISINFf(__c) ? 1 : 0, __c); |
| 161 | __d = _COPYSIGNf(_ISINFf(__d) ? 1 : 0, __d); |
| 162 | if (_ISNANf(__a)) |
| 163 | __a = _COPYSIGNf(0, __a); |
| 164 | if (_ISNANf(__b)) |
| 165 | __b = _COPYSIGNf(0, __b); |
| 166 | __recalc = 1; |
| 167 | } |
| 168 | if (!__recalc && |
| 169 | (_ISINFf(__ac) || _ISINFf(__bd) || _ISINFf(__ad) || _ISINFf(__bc))) { |
| 170 | if (_ISNANf(__a)) |
| 171 | __a = _COPYSIGNf(0, __a); |
| 172 | if (_ISNANf(__b)) |
| 173 | __b = _COPYSIGNf(0, __b); |
| 174 | if (_ISNANf(__c)) |
| 175 | __c = _COPYSIGNf(0, __c); |
| 176 | if (_ISNANf(__d)) |
| 177 | __d = _COPYSIGNf(0, __d); |
| 178 | __recalc = 1; |
| 179 | } |
| 180 | if (__recalc) { |
| 181 | __real__(z) = __builtin_huge_valf() * (__a * __c - __b * __d); |
| 182 | __imag__(z) = __builtin_huge_valf() * (__a * __d + __b * __c); |
| 183 | } |
| 184 | } |
| 185 | return z; |
| 186 | } |
| 187 | |
| 188 | __DEVICE__ double _Complex __divdc3(double __a, double __b, double __c, |
| 189 | double __d) { |
| 190 | int __ilogbw = 0; |
| 191 | // Can't use std::max, because that's defined in <algorithm>, and we don't |
| 192 | // want to pull that in for every compile. The CUDA headers define |
| 193 | // ::max(float, float) and ::max(double, double), which is sufficient for us. |
Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 194 | double __logbw = _LOGBd(_fmaxd(_ABSd(__c), _ABSd(__d))); |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 195 | if (_ISFINITEd(__logbw)) { |
| 196 | __ilogbw = (int)__logbw; |
| 197 | __c = _SCALBNd(__c, -__ilogbw); |
| 198 | __d = _SCALBNd(__d, -__ilogbw); |
| 199 | } |
| 200 | double __denom = __c * __c + __d * __d; |
| 201 | double _Complex z; |
| 202 | __real__(z) = _SCALBNd((__a * __c + __b * __d) / __denom, -__ilogbw); |
| 203 | __imag__(z) = _SCALBNd((__b * __c - __a * __d) / __denom, -__ilogbw); |
| 204 | if (_ISNANd(__real__(z)) && _ISNANd(__imag__(z))) { |
| 205 | if ((__denom == 0.0) && (!_ISNANd(__a) || !_ISNANd(__b))) { |
| 206 | __real__(z) = _COPYSIGNd(__builtin_huge_val(), __c) * __a; |
| 207 | __imag__(z) = _COPYSIGNd(__builtin_huge_val(), __c) * __b; |
| 208 | } else if ((_ISINFd(__a) || _ISINFd(__b)) && _ISFINITEd(__c) && |
| 209 | _ISFINITEd(__d)) { |
| 210 | __a = _COPYSIGNd(_ISINFd(__a) ? 1.0 : 0.0, __a); |
| 211 | __b = _COPYSIGNd(_ISINFd(__b) ? 1.0 : 0.0, __b); |
| 212 | __real__(z) = __builtin_huge_val() * (__a * __c + __b * __d); |
| 213 | __imag__(z) = __builtin_huge_val() * (__b * __c - __a * __d); |
| 214 | } else if (_ISINFd(__logbw) && __logbw > 0.0 && _ISFINITEd(__a) && |
| 215 | _ISFINITEd(__b)) { |
| 216 | __c = _COPYSIGNd(_ISINFd(__c) ? 1.0 : 0.0, __c); |
| 217 | __d = _COPYSIGNd(_ISINFd(__d) ? 1.0 : 0.0, __d); |
| 218 | __real__(z) = 0.0 * (__a * __c + __b * __d); |
| 219 | __imag__(z) = 0.0 * (__b * __c - __a * __d); |
| 220 | } |
| 221 | } |
| 222 | return z; |
| 223 | } |
| 224 | |
| 225 | __DEVICE__ float _Complex __divsc3(float __a, float __b, float __c, float __d) { |
| 226 | int __ilogbw = 0; |
Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 227 | float __logbw = _LOGBf(_fmaxf(_ABSf(__c), _ABSf(__d))); |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 228 | if (_ISFINITEf(__logbw)) { |
| 229 | __ilogbw = (int)__logbw; |
| 230 | __c = _SCALBNf(__c, -__ilogbw); |
| 231 | __d = _SCALBNf(__d, -__ilogbw); |
| 232 | } |
| 233 | float __denom = __c * __c + __d * __d; |
| 234 | float _Complex z; |
| 235 | __real__(z) = _SCALBNf((__a * __c + __b * __d) / __denom, -__ilogbw); |
| 236 | __imag__(z) = _SCALBNf((__b * __c - __a * __d) / __denom, -__ilogbw); |
| 237 | if (_ISNANf(__real__(z)) && _ISNANf(__imag__(z))) { |
| 238 | if ((__denom == 0) && (!_ISNANf(__a) || !_ISNANf(__b))) { |
| 239 | __real__(z) = _COPYSIGNf(__builtin_huge_valf(), __c) * __a; |
| 240 | __imag__(z) = _COPYSIGNf(__builtin_huge_valf(), __c) * __b; |
| 241 | } else if ((_ISINFf(__a) || _ISINFf(__b)) && _ISFINITEf(__c) && |
| 242 | _ISFINITEf(__d)) { |
| 243 | __a = _COPYSIGNf(_ISINFf(__a) ? 1 : 0, __a); |
| 244 | __b = _COPYSIGNf(_ISINFf(__b) ? 1 : 0, __b); |
| 245 | __real__(z) = __builtin_huge_valf() * (__a * __c + __b * __d); |
| 246 | __imag__(z) = __builtin_huge_valf() * (__b * __c - __a * __d); |
| 247 | } else if (_ISINFf(__logbw) && __logbw > 0 && _ISFINITEf(__a) && |
| 248 | _ISFINITEf(__b)) { |
| 249 | __c = _COPYSIGNf(_ISINFf(__c) ? 1 : 0, __c); |
| 250 | __d = _COPYSIGNf(_ISINFf(__d) ? 1 : 0, __d); |
| 251 | __real__(z) = 0 * (__a * __c + __b * __d); |
| 252 | __imag__(z) = 0 * (__b * __c - __a * __d); |
| 253 | } |
| 254 | } |
| 255 | return z; |
| 256 | } |
| 257 | |
| 258 | #if defined(__cplusplus) |
| 259 | } // extern "C" |
| 260 | #endif |
| 261 | |
| 262 | #undef _ISNANd |
| 263 | #undef _ISNANf |
| 264 | #undef _ISINFd |
| 265 | #undef _ISINFf |
| 266 | #undef _COPYSIGNd |
| 267 | #undef _COPYSIGNf |
| 268 | #undef _ISFINITEd |
| 269 | #undef _ISFINITEf |
| 270 | #undef _SCALBNd |
| 271 | #undef _SCALBNf |
| 272 | #undef _ABSd |
| 273 | #undef _ABSf |
| 274 | #undef _LOGBd |
| 275 | #undef _LOGBf |
Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 276 | #undef _fmaxd |
| 277 | #undef _fmaxf |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 278 | |
Pirama Arumuga Nainar | 494f645 | 2021-12-02 10:42:14 -0800 | [diff] [blame] | 279 | #if defined(__OPENMP_NVPTX__) || defined(__OPENMP_AMDGCN__) |
Sasha Smundak | 0fc590b | 2020-10-07 08:11:59 -0700 | [diff] [blame] | 280 | #pragma omp end declare target |
| 281 | #endif |
| 282 | |
| 283 | #pragma pop_macro("__DEVICE__") |
| 284 | |
| 285 | #endif // __CLANG_CUDA_COMPLEX_BUILTINS |