#pragma once
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#ifdef __HIPCC__
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#include <hip/hip_runtime.h>
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#endif
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#include <cmath>
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#include <type_traits>
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#include <c10/util/BFloat16.h>
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#include <c10/macros/Macros.h>
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namespace at {
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// std::isnan isn't performant to use on integral types; it will
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// (uselessly) convert to floating point and then do the test.
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// This function is.
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template <typename T,
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typename std::enable_if<std::is_integral<T>::value, int>::type = 0>
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inline C10_HOST_DEVICE bool _isnan(T val) {
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return false;
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}
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template <typename T,
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typename std::enable_if<std::is_floating_point<T>::value, int>::type = 0>
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inline C10_HOST_DEVICE bool _isnan(T val) {
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#if defined(__CUDACC__) || defined(__HIPCC__)
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return ::isnan(val);
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#else
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return std::isnan(val);
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#endif
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}
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inline C10_HOST_DEVICE bool _isnan(at::BFloat16 val) {
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return at::_isnan(float(val));
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}
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} // namespace at
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