mirror of
https://github.com/matrix-construct/construct
synced 2024-11-12 04:51:08 +01:00
42 lines
1 KiB
C++
42 lines
1 KiB
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_LANE_CAST_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 lane_cast(const T);
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}
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/// Convert each lane from a smaller type to a larger type
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template<class R,
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class T>
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[[using gnu: always_inline, gnu_inline, artificial]]
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extern inline R
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ircd::simd::lane_cast(const T in)
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{
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#if __has_builtin(__builtin_convertvector)
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return __builtin_convertvector(in, R);
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#else
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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] = in[i];
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return ret;
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#endif
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static_assert
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(
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lanes<R>() == lanes<T>(), "Types must have matching number of lanes."
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);
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}
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