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/******************************************************************************
* Copyright (c) 2011, Duane Merrill. All rights reserved.
* Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the NVIDIA CORPORATION 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 NVIDIA CORPORATION 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.
*
******************************************************************************/
/**
* @file Utilities for strong memory operations.
*/
#pragma once
#include <cub/config.cuh>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <cub/util_ptx.cuh>
#include <cub/util_type.cuh>
#include <iterator>
CUB_NAMESPACE_BEGIN
#ifndef DOXYGEN_SHOULD_SKIP_THIS // Do not document
namespace detail
{
static __device__ __forceinline__ uint4 load_relaxed(uint4 const *ptr)
{
uint4 retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.v4.u32 {%0, %1, %2, %3}, [%4];"
: "=r"(retval.x), "=r"(retval.y), "=r"(retval.z), "=r"(retval.w)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.v4.u32 {%0, %1, %2, %3}, [%4];"
: "=r"(retval.x), "=r"(retval.y), "=r"(retval.z), "=r"(retval.w)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ ulonglong2 load_relaxed(ulonglong2 const *ptr)
{
ulonglong2 retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.v2.u64 {%0, %1}, [%2];"
: "=l"(retval.x), "=l"(retval.y)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.v2.u64 {%0, %1}, [%2];"
: "=l"(retval.x), "=l"(retval.y)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ ushort4 load_relaxed(ushort4 const *ptr)
{
ushort4 retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.v4.u16 {%0, %1, %2, %3}, [%4];"
: "=h"(retval.x), "=h"(retval.y), "=h"(retval.z), "=h"(retval.w)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.v4.u16 {%0, %1, %2, %3}, [%4];"
: "=h"(retval.x), "=h"(retval.y), "=h"(retval.z), "=h"(retval.w)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ uint2 load_relaxed(uint2 const *ptr)
{
uint2 retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.v2.u32 {%0, %1}, [%2];"
: "=r"(retval.x), "=r"(retval.y)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.v2.u32 {%0, %1}, [%2];"
: "=r"(retval.x), "=r"(retval.y)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ unsigned long long load_relaxed(unsigned long long const *ptr)
{
unsigned long long retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.u64 %0, [%1];"
: "=l"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.u64 %0, [%1];"
: "=l"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ unsigned int load_relaxed(unsigned int const *ptr)
{
unsigned int retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.u32 %0, [%1];"
: "=r"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.u32 %0, [%1];"
: "=r"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ unsigned short load_relaxed(unsigned short const *ptr)
{
unsigned short retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("ld.relaxed.gpu.u16 %0, [%1];"
: "=h"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("ld.cg.u16 %0, [%1];"
: "=h"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return retval;
}
static __device__ __forceinline__ unsigned char load_relaxed(unsigned char const *ptr)
{
unsigned short retval;
NV_IF_TARGET(NV_PROVIDES_SM_70,
(asm volatile("{"
" .reg .u8 datum;"
" ld.relaxed.gpu.u8 datum, [%1];"
" cvt.u16.u8 %0, datum;"
"}"
: "=h"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");),
(asm volatile("{"
" .reg .u8 datum;"
" ld.cg.u8 datum, [%1];"
" cvt.u16.u8 %0, datum;"
"}"
: "=h"(retval)
: _CUB_ASM_PTR_(ptr)
: "memory");));
return (unsigned char)retval;
}
} // namespace detail
#endif // DOXYGEN_SHOULD_SKIP_THIS
CUB_NAMESPACE_END
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