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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__") |
19 | #if defined(__OPENMP_NVPTX__) || defined(__OPENMP_AMDGCN__) |
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. |
29 | #if !defined(__OPENMP_NVPTX__) && !defined(__OPENMP_AMDGCN__) |
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 |
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 |
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 |
80 | #define _fmaxd __nv_fmax |
81 | #define _fmaxf __nv_fmaxf |
82 | #endif |
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. |
194 | double __logbw = _LOGBd(_fmaxd(_ABSd(__c), _ABSd(__d))); |
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; |
227 | float __logbw = _LOGBf(_fmaxf(_ABSf(__c), _ABSf(__d))); |
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 |
276 | #undef _fmaxd |
277 | #undef _fmaxf |
278 | |
279 | #if defined(__OPENMP_NVPTX__) || defined(__OPENMP_AMDGCN__) |
280 | #pragma omp end declare target |
281 | #endif |
282 | |
283 | #pragma pop_macro("__DEVICE__") |
284 | |
285 | #endif // __CLANG_CUDA_COMPLEX_BUILTINS |
286 |
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