mirror of
https://github.com/matrix-construct/construct
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44 lines
924 B
C++
44 lines
924 B
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_SIMD_LOWER_H
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namespace ircd::simd
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{
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template<class R,
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class T>
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R lower(const T) noexcept;
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}
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template<class R,
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class T>
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inline R
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ircd::simd::lower(const T a)
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noexcept
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{
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static_assert
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(
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sizeof(R) * 2 == sizeof(T),
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"Types must have equal size."
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);
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static_assert
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(
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lanes<R>() * 2 == lanes<T>(),
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"T must have twice as many lanes as R"
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);
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R ret;
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for(size_t i(0); i < lanes<R>(); ++i)
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ret[i] = a[i];
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return ret;
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}
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