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1 | /*===---- openmp_wrapper/math.h -------- OpenMP math.h intercept ------ c++ -=== |
---|---|
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 | // If we are in C++ mode and include <math.h> (not <cmath>) first, we still need |
11 | // to make sure <cmath> is read first. The problem otherwise is that we haven't |
12 | // seen the declarations of the math.h functions when the system math.h includes |
13 | // our cmath overlay. However, our cmath overlay, or better the underlying |
14 | // overlay, e.g. CUDA, uses the math.h functions. Since we haven't declared them |
15 | // yet we get errors. CUDA avoids this by eagerly declaring all math functions |
16 | // (in the __device__ space) but we cannot do this. Instead we break the |
17 | // dependence by forcing cmath to go first. While our cmath will in turn include |
18 | // this file, the cmath guards will prevent recursion. |
19 | #ifdef __cplusplus |
20 | #include <cmath> |
21 | #endif |
22 | |
23 | #ifndef __CLANG_OPENMP_MATH_H__ |
24 | #define __CLANG_OPENMP_MATH_H__ |
25 | |
26 | #ifndef _OPENMP |
27 | #error "This file is for OpenMP compilation only." |
28 | #endif |
29 | |
30 | #include_next <math.h> |
31 | |
32 | // We need limits.h for __clang_cuda_math.h below and because it should not hurt |
33 | // we include it eagerly here. |
34 | #include <limits.h> |
35 | |
36 | // We need stdlib.h because (for now) __clang_cuda_math.h below declares `abs` |
37 | // which should live in stdlib.h. |
38 | #include <stdlib.h> |
39 | |
40 | #pragma omp begin declare variant match( \ |
41 | device = {arch(nvptx, nvptx64)}, implementation = {extension(match_any)}) |
42 | |
43 | #define __CUDA__ |
44 | #define __OPENMP_NVPTX__ |
45 | #include <__clang_cuda_math.h> |
46 | #undef __OPENMP_NVPTX__ |
47 | #undef __CUDA__ |
48 | |
49 | #pragma omp end declare variant |
50 | |
51 | #ifdef __AMDGCN__ |
52 | #pragma omp begin declare variant match(device = {arch(amdgcn)}) |
53 | |
54 | #define __OPENMP_AMDGCN__ |
55 | #include <__clang_hip_math.h> |
56 | #undef __OPENMP_AMDGCN__ |
57 | |
58 | #pragma omp end declare variant |
59 | #endif |
60 | |
61 | #endif |
62 |
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