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52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// SPDX-License-Identifier: MIT
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// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
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#pragma once
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namespace ck {
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template <class T, T v>
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struct integral_constant
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{
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static constexpr T value = v;
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typedef T value_type;
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typedef integral_constant type;
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__host__ __device__ constexpr operator value_type() const noexcept { return value; }
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__host__ __device__ constexpr value_type operator()() const noexcept { return value; }
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};
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template <typename TX, TX X, typename TY, TY Y>
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__host__ __device__ constexpr auto operator+(integral_constant<TX, X>, integral_constant<TY, Y>)
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{
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return integral_constant<decltype(X + Y), X + Y>{};
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}
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template <typename TX, TX X, typename TY, TY Y>
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__host__ __device__ constexpr auto operator-(integral_constant<TX, X>, integral_constant<TY, Y>)
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{
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static_assert(Y <= X, "wrong!");
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return integral_constant<decltype(X - Y), X - Y>{};
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}
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template <typename TX, TX X, typename TY, TY Y>
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__host__ __device__ constexpr auto operator*(integral_constant<TX, X>, integral_constant<TY, Y>)
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{
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return integral_constant<decltype(X * Y), X * Y>{};
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}
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template <typename TX, TX X, typename TY, TY Y>
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__host__ __device__ constexpr auto operator/(integral_constant<TX, X>, integral_constant<TY, Y>)
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{
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static_assert(Y > 0, "wrong!");
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return integral_constant<decltype(X / Y), X / Y>{};
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}
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template <typename TX, TX X, typename TY, TY Y>
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__host__ __device__ constexpr auto operator%(integral_constant<TX, X>, integral_constant<TY, Y>)
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{
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static_assert(Y > 0, "wrong!");
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return integral_constant<decltype(X % Y), X % Y>{};
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}
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} // namespace ck
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