1 /*===---- complex - CUDA wrapper for <complex> ------------------------------===
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21 *===-----------------------------------------------------------------------===
24 #ifndef __CLANG_CUDA_WRAPPERS_COMPLEX
25 #define __CLANG_CUDA_WRAPPERS_COMPLEX
27 // Wrapper around <complex> that forces its functions to be __host__
30 // First, include host-only headers we think are likely to be included by
31 // <complex>, so that the pragma below only applies to <complex> itself.
32 #if __cplusplus >= 201103L
33 #include <type_traits>
39 // Next, include our <algorithm> wrapper, to ensure that device overloads of
40 // std::min/max are available.
43 #pragma clang force_cuda_host_device begin
45 // When compiling for device, ask libstdc++ to use its own implements of
46 // complex functions, rather than calling builtins (which resolve to library
47 // functions that don't exist when compiling CUDA device code).
49 // This is a little dicey, because it causes libstdc++ to define a different
50 // set of overloads on host and device.
52 // // Present only when compiling for host.
53 // __host__ __device__ void complex<float> sin(const complex<float>& x) {
54 // return __builtin_csinf(x);
57 // // Present when compiling for host and for device.
58 // template <typename T>
59 // void __host__ __device__ complex<T> sin(const complex<T>& x) {
60 // return complex<T>(sin(x.real()) * cosh(x.imag()),
61 // cos(x.real()), sinh(x.imag()));
64 // This is safe because when compiling for device, all function calls in
65 // __host__ code to sin() will still resolve to *something*, even if they don't
66 // resolve to the same function as they resolve to when compiling for host. We
67 // don't care that they don't resolve to the right function because we won't
68 // codegen this host code when compiling for device.
70 #pragma push_macro("_GLIBCXX_USE_C99_COMPLEX")
71 #pragma push_macro("_GLIBCXX_USE_C99_COMPLEX_TR1")
72 #define _GLIBCXX_USE_C99_COMPLEX 0
73 #define _GLIBCXX_USE_C99_COMPLEX_TR1 0
75 // Work around a compatibility issue with libstdc++ 11.1.0
76 // https://bugs.llvm.org/show_bug.cgi?id=50383
77 #pragma push_macro("__failed_assertion")
78 #if _GLIBCXX_RELEASE == 11
79 #define __failed_assertion __cuda_failed_assertion
82 #include_next <complex>
84 #pragma pop_macro("__failed_assertion")
85 #pragma pop_macro("_GLIBCXX_USE_C99_COMPLEX_TR1")
86 #pragma pop_macro("_GLIBCXX_USE_C99_COMPLEX")
88 #pragma clang force_cuda_host_device end
90 #endif // include guard