mirror of
https://github.com/matrix-construct/construct
synced 2024-11-13 21:41:06 +01:00
44 lines
924 B
C++
44 lines
924 B
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_SIMD_LOWER_H
|
|
|
|
namespace ircd::simd
|
|
{
|
|
template<class R,
|
|
class T>
|
|
R lower(const T) noexcept;
|
|
}
|
|
|
|
template<class R,
|
|
class T>
|
|
inline R
|
|
ircd::simd::lower(const T a)
|
|
noexcept
|
|
{
|
|
static_assert
|
|
(
|
|
sizeof(R) * 2 == sizeof(T),
|
|
"Types must have equal size."
|
|
);
|
|
|
|
static_assert
|
|
(
|
|
lanes<R>() * 2 == lanes<T>(),
|
|
"T must have twice as many lanes as R"
|
|
);
|
|
|
|
R ret;
|
|
for(size_t i(0); i < lanes<R>(); ++i)
|
|
ret[i] = a[i];
|
|
|
|
return ret;
|
|
}
|