71 lines
2.9 KiB
C++
71 lines
2.9 KiB
C++
/***************************************************************************************************
|
|
* Copyright (c) 2023 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
**************************************************************************************************/
|
|
#pragma once
|
|
|
|
#include <cute/config.hpp>
|
|
|
|
#include <cute/numeric/numeric_types.hpp>
|
|
#include <cute/numeric/math.hpp>
|
|
|
|
namespace cute
|
|
{
|
|
|
|
// Test if a pointer is aligned to N bytes
|
|
template <int N>
|
|
CUTE_HOST_DEVICE constexpr
|
|
bool
|
|
is_byte_aligned(void const* const ptr)
|
|
{
|
|
static_assert(N > 0 && (N & (N - 1)) == 0, "N must be a power of 2 in alignment check");
|
|
return (reinterpret_cast<uintptr_t>(ptr) & (N-1)) == 0;
|
|
}
|
|
|
|
#if defined(__CUDACC__)
|
|
# define CUTE_ALIGNAS(n) __align__(n)
|
|
#else
|
|
# define CUTE_ALIGNAS(n) alignas(n)
|
|
#endif
|
|
|
|
template <size_t Alignment>
|
|
struct aligned_struct {};
|
|
|
|
template <> struct CUTE_ALIGNAS( 1) aligned_struct< 1> {};
|
|
template <> struct CUTE_ALIGNAS( 2) aligned_struct< 2> {};
|
|
template <> struct CUTE_ALIGNAS( 4) aligned_struct< 4> {};
|
|
template <> struct CUTE_ALIGNAS( 8) aligned_struct< 8> {};
|
|
template <> struct CUTE_ALIGNAS( 16) aligned_struct< 16> {};
|
|
template <> struct CUTE_ALIGNAS( 32) aligned_struct< 32> {};
|
|
template <> struct CUTE_ALIGNAS( 64) aligned_struct< 64> {};
|
|
template <> struct CUTE_ALIGNAS(128) aligned_struct<128> {};
|
|
template <> struct CUTE_ALIGNAS(256) aligned_struct<256> {};
|
|
|
|
} // end namespace cute
|