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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
// SPDX-License-Identifier: MIT
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// Copyright (c) 2018-2022, Advanced Micro Devices, Inc. All rights reserved.
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#pragma once
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#include "ck/utility/functional.hpp"
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#include "ck/utility/sequence.hpp"
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namespace ck {
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namespace detail {
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template <class>
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struct static_for_impl;
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template <index_t... Is>
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struct static_for_impl<Sequence<Is...>>
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{
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template <class F>
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__host__ __device__ constexpr void operator()(F f) const
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{
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swallow{(f(Number<Is>{}), 0)...};
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}
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};
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} // namespace detail
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// F signature: F(Number<Iter>)
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template <index_t NBegin, index_t NEnd, index_t Increment>
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struct static_for
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{
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__host__ __device__ constexpr static_for()
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{
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static_assert(Increment != 0 && (NEnd - NBegin) % Increment == 0,
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"Wrong! should satisfy (NEnd - NBegin) % Increment == 0");
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static_assert((Increment > 0 && NBegin <= NEnd) || (Increment < 0 && NBegin >= NEnd),
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"wrongs! should (Increment > 0 && NBegin <= NEnd) || (Increment < 0 && "
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"NBegin >= NEnd)");
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}
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template <class F>
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__host__ __device__ constexpr void operator()(F f) const
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{
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detail::static_for_impl<typename arithmetic_sequence_gen<NBegin, NEnd, Increment>::type>{}(
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f);
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}
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};
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} // namespace ck
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