| /*===---- openmp_wrapper/math.h -------- OpenMP math.h intercept ------ c++ -=== |
| * |
| * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| * See https://llvm.org/LICENSE.txt for license information. |
| * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| * |
| *===-----------------------------------------------------------------------=== |
| */ |
| |
| // If we are in C++ mode and include <math.h> (not <cmath>) first, we still need |
| // to make sure <cmath> is read first. The problem otherwise is that we haven't |
| // seen the declarations of the math.h functions when the system math.h includes |
| // our cmath overlay. However, our cmath overlay, or better the underlying |
| // overlay, e.g. CUDA, uses the math.h functions. Since we haven't declared them |
| // yet we get errors. CUDA avoids this by eagerly declaring all math functions |
| // (in the __device__ space) but we cannot do this. Instead we break the |
| // dependence by forcing cmath to go first. While our cmath will in turn include |
| // this file, the cmath guards will prevent recursion. |
| #ifdef __cplusplus |
| #include <cmath> |
| #endif |
| |
| #ifndef __CLANG_OPENMP_MATH_H__ |
| #define __CLANG_OPENMP_MATH_H__ |
| |
| #ifndef _OPENMP |
| #error "This file is for OpenMP compilation only." |
| #endif |
| |
| #include_next <math.h> |
| |
| // We need limits.h for __clang_cuda_math.h below and because it should not hurt |
| // we include it eagerly here. |
| #include <limits.h> |
| |
| // We need stdlib.h because (for now) __clang_cuda_math.h below declares `abs` |
| // which should live in stdlib.h. |
| #include <stdlib.h> |
| |
| #pragma omp begin declare variant match( \ |
| device = {arch(nvptx, nvptx64)}, implementation = {extension(match_any)}) |
| |
| #define __CUDA__ |
| #define __OPENMP_NVPTX__ |
| #include <__clang_cuda_math.h> |
| #undef __OPENMP_NVPTX__ |
| #undef __CUDA__ |
| |
| #pragma omp end declare variant |
| |
| #ifdef __AMDGCN__ |
| #pragma omp begin declare variant match(device = {arch(amdgcn)}) |
| |
| #define __OPENMP_AMDGCN__ |
| #include <__clang_hip_math.h> |
| #undef __OPENMP_AMDGCN__ |
| |
| #pragma omp end declare variant |
| #endif |
| |
| #endif |