1/*===---- __clang_cuda_cmath.h - Device-side CUDA cmath support ------------=== 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 * THE SOFTWARE. 20 * 21 *===-----------------------------------------------------------------------=== 22 */ 23#ifndef __CLANG_CUDA_CMATH_H__ 24#define __CLANG_CUDA_CMATH_H__ 25#ifndef __CUDA__ 26#error "This file is for CUDA compilation only." 27#endif 28 29// CUDA lets us use various std math functions on the device side. This file 30// works in concert with __clang_cuda_math_forward_declares.h to make this work. 31// 32// Specifically, the forward-declares header declares __device__ overloads for 33// these functions in the global namespace, then pulls them into namespace std 34// with 'using' statements. Then this file implements those functions, after 35// the implementations have been pulled in. 36// 37// It's important that we declare the functions in the global namespace and pull 38// them into namespace std with using statements, as opposed to simply declaring 39// these functions in namespace std, because our device functions need to 40// overload the standard library functions, which may be declared in the global 41// namespace or in std, depending on the degree of conformance of the stdlib 42// implementation. Declaring in the global namespace and pulling into namespace 43// std covers all of the known knowns. 44 45#define __DEVICE__ static __device__ __inline__ __attribute__((always_inline)) 46 47__DEVICE__ long long abs(long long __n) { return ::llabs(__n); } 48__DEVICE__ long abs(long __n) { return ::labs(__n); } 49__DEVICE__ float abs(float __x) { return ::fabsf(__x); } 50__DEVICE__ double abs(double __x) { return ::fabs(__x); } 51__DEVICE__ float acos(float __x) { return ::acosf(__x); } 52__DEVICE__ float asin(float __x) { return ::asinf(__x); } 53__DEVICE__ float atan(float __x) { return ::atanf(__x); } 54__DEVICE__ float atan2(float __x, float __y) { return ::atan2f(__x, __y); } 55__DEVICE__ float ceil(float __x) { return ::ceilf(__x); } 56__DEVICE__ float cos(float __x) { return ::cosf(__x); } 57__DEVICE__ float cosh(float __x) { return ::coshf(__x); } 58__DEVICE__ float exp(float __x) { return ::expf(__x); } 59__DEVICE__ float fabs(float __x) { return ::fabsf(__x); } 60__DEVICE__ float floor(float __x) { return ::floorf(__x); } 61__DEVICE__ float fmod(float __x, float __y) { return ::fmodf(__x, __y); } 62__DEVICE__ int fpclassify(float __x) { 63 return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, 64 FP_ZERO, __x); 65} 66__DEVICE__ int fpclassify(double __x) { 67 return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, 68 FP_ZERO, __x); 69} 70__DEVICE__ float frexp(float __arg, int *__exp) { 71 return ::frexpf(__arg, __exp); 72} 73__DEVICE__ bool isinf(float __x) { return ::__isinff(__x); } 74__DEVICE__ bool isinf(double __x) { return ::__isinf(__x); } 75__DEVICE__ bool isfinite(float __x) { return ::__finitef(__x); } 76__DEVICE__ bool isfinite(double __x) { return ::__finite(__x); } 77__DEVICE__ bool isgreater(float __x, float __y) { 78 return __builtin_isgreater(__x, __y); 79} 80__DEVICE__ bool isgreater(double __x, double __y) { 81 return __builtin_isgreater(__x, __y); 82} 83__DEVICE__ bool isgreaterequal(float __x, float __y) { 84 return __builtin_isgreaterequal(__x, __y); 85} 86__DEVICE__ bool isgreaterequal(double __x, double __y) { 87 return __builtin_isgreaterequal(__x, __y); 88} 89__DEVICE__ bool isless(float __x, float __y) { 90 return __builtin_isless(__x, __y); 91} 92__DEVICE__ bool isless(double __x, double __y) { 93 return __builtin_isless(__x, __y); 94} 95__DEVICE__ bool islessequal(float __x, float __y) { 96 return __builtin_islessequal(__x, __y); 97} 98__DEVICE__ bool islessequal(double __x, double __y) { 99 return __builtin_islessequal(__x, __y); 100} 101__DEVICE__ bool islessgreater(float __x, float __y) { 102 return __builtin_islessgreater(__x, __y); 103} 104__DEVICE__ bool islessgreater(double __x, double __y) { 105 return __builtin_islessgreater(__x, __y); 106} 107__DEVICE__ bool isnan(float __x) { return ::__isnanf(__x); } 108__DEVICE__ bool isnan(double __x) { return ::__isnan(__x); } 109__DEVICE__ bool isnormal(float __x) { return __builtin_isnormal(__x); } 110__DEVICE__ bool isnormal(double __x) { return __builtin_isnormal(__x); } 111__DEVICE__ bool isunordered(float __x, float __y) { 112 return __builtin_isunordered(__x, __y); 113} 114__DEVICE__ bool isunordered(double __x, double __y) { 115 return __builtin_isunordered(__x, __y); 116} 117__DEVICE__ float ldexp(float __arg, int __exp) { 118 return ::ldexpf(__arg, __exp); 119} 120__DEVICE__ float log(float __x) { return ::logf(__x); } 121__DEVICE__ float log10(float __x) { return ::log10f(__x); } 122__DEVICE__ float modf(float __x, float *__iptr) { return ::modff(__x, __iptr); } 123__DEVICE__ float nexttoward(float __from, float __to) { 124 return __builtin_nexttowardf(__from, __to); 125} 126__DEVICE__ double nexttoward(double __from, double __to) { 127 return __builtin_nexttoward(__from, __to); 128} 129__DEVICE__ float pow(float __base, float __exp) { 130 return ::powf(__base, __exp); 131} 132__DEVICE__ float pow(float __base, int __iexp) { 133 return ::powif(__base, __iexp); 134} 135__DEVICE__ double pow(double __base, int __iexp) { 136 return ::powi(__base, __iexp); 137} 138__DEVICE__ bool signbit(float __x) { return ::__signbitf(__x); } 139__DEVICE__ bool signbit(double __x) { return ::__signbit(__x); } 140__DEVICE__ float sin(float __x) { return ::sinf(__x); } 141__DEVICE__ float sinh(float __x) { return ::sinhf(__x); } 142__DEVICE__ float sqrt(float __x) { return ::sqrtf(__x); } 143__DEVICE__ float tan(float __x) { return ::tanf(__x); } 144__DEVICE__ float tanh(float __x) { return ::tanhf(__x); } 145 146#undef __DEVICE__ 147 148#endif 149