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tools/cub-1.8.0/cub/util_arch.cuh
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/******************************************************************************
* Copyright (c) 2011, Duane Merrill. All rights reserved.
* Copyright (c) 2011-2018, 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
* Static architectural properties by SM version.
*/
#pragma once
#include "util_namespace.cuh"
/// Optional outer namespace(s)
CUB_NS_PREFIX
/// CUB namespace
namespace cub {
#ifndef DOXYGEN_SHOULD_SKIP_THIS // Do not document
#if (__CUDACC_VER_MAJOR__ >= 9) && !defined(CUB_USE_COOPERATIVE_GROUPS)
#define CUB_USE_COOPERATIVE_GROUPS
#endif
/// CUB_PTX_ARCH reflects the PTX version targeted by the active compiler pass (or zero during the host pass).
#ifndef CUB_PTX_ARCH
#ifndef __CUDA_ARCH__
#define CUB_PTX_ARCH 0
#else
#define CUB_PTX_ARCH __CUDA_ARCH__
#endif
#endif
/// Whether or not the source targeted by the active compiler pass is allowed to invoke device kernels or methods from the CUDA runtime API.
#ifndef CUB_RUNTIME_FUNCTION
#if !defined(__CUDA_ARCH__) || (__CUDA_ARCH__>= 350 && defined(__CUDACC_RDC__))
#define CUB_RUNTIME_ENABLED
#define CUB_RUNTIME_FUNCTION __host__ __device__
#else
#define CUB_RUNTIME_FUNCTION __host__
#endif
#endif
/// Number of threads per warp
#ifndef CUB_LOG_WARP_THREADS
#define CUB_LOG_WARP_THREADS(arch) \
(5)
#define CUB_WARP_THREADS(arch) \
(1 << CUB_LOG_WARP_THREADS(arch))
#define CUB_PTX_WARP_THREADS CUB_WARP_THREADS(CUB_PTX_ARCH)
#define CUB_PTX_LOG_WARP_THREADS CUB_LOG_WARP_THREADS(CUB_PTX_ARCH)
#endif
/// Number of smem banks
#ifndef CUB_LOG_SMEM_BANKS
#define CUB_LOG_SMEM_BANKS(arch) \
((arch >= 200) ? \
(5) : \
(4))
#define CUB_SMEM_BANKS(arch) \
(1 << CUB_LOG_SMEM_BANKS(arch))
#define CUB_PTX_LOG_SMEM_BANKS CUB_LOG_SMEM_BANKS(CUB_PTX_ARCH)
#define CUB_PTX_SMEM_BANKS CUB_SMEM_BANKS(CUB_PTX_ARCH)
#endif
/// Oversubscription factor
#ifndef CUB_SUBSCRIPTION_FACTOR
#define CUB_SUBSCRIPTION_FACTOR(arch) \
((arch >= 300) ? \
(5) : \
((arch >= 200) ? \
(3) : \
(10)))
#define CUB_PTX_SUBSCRIPTION_FACTOR CUB_SUBSCRIPTION_FACTOR(CUB_PTX_ARCH)
#endif
/// Prefer padding overhead vs X-way conflicts greater than this threshold
#ifndef CUB_PREFER_CONFLICT_OVER_PADDING
#define CUB_PREFER_CONFLICT_OVER_PADDING(arch) \
((arch >= 300) ? \
(1) : \
(4))
#define CUB_PTX_PREFER_CONFLICT_OVER_PADDING CUB_PREFER_CONFLICT_OVER_PADDING(CUB_PTX_ARCH)
#endif
/// Scale down the number of threads to keep same amount of scratch storage as the nominal configuration for 4B data. Minimum of two warps.
#ifndef CUB_SCALED_BLOCK_THREADS
#define CUB_SCALED_BLOCK_THREADS(NOMINAL_4B_BLOCK_THREADS, T, PTX_ARCH) \
(CUB_MIN( \
NOMINAL_4B_BLOCK_THREADS, \
CUB_WARP_THREADS(PTX_ARCH) * CUB_MAX( \
2, \
(NOMINAL_4B_BLOCK_THREADS / CUB_WARP_THREADS(PTX_ARCH)) * 4 / sizeof(T))))
#endif
/// Scale down number of items per thread to keep the same amount of register storage as the nominal configuration for 4B data. Minimum 1 item per thread
#ifndef CUB_SCALED_ITEMS_PER_THREAD
#define CUB_SCALED_ITEMS_PER_THREAD(NOMINAL_4B_ITEMS_PER_THREAD, NOMINAL_4B_BLOCK_THREADS, T, PTX_ARCH) \
CUB_MAX( \
1, \
(sizeof(T) < 4) ? \
((NOMINAL_4B_ITEMS_PER_THREAD * NOMINAL_4B_BLOCK_THREADS * 4) / CUB_MAX(4, sizeof(T))) / CUB_SCALED_BLOCK_THREADS(NOMINAL_4B_BLOCK_THREADS, T, PTX_ARCH) / 2 : \
((NOMINAL_4B_ITEMS_PER_THREAD * NOMINAL_4B_BLOCK_THREADS * 4) / CUB_MAX(4, sizeof(T))) / CUB_SCALED_BLOCK_THREADS(NOMINAL_4B_BLOCK_THREADS, T, PTX_ARCH))
#endif
/// Define both nominal threads-per-block and items-per-thread
#ifndef CUB_SCALED_GRANULARITIES
#define CUB_SCALED_GRANULARITIES(NOMINAL_4B_BLOCK_THREADS, NOMINAL_4B_ITEMS_PER_THREAD, T) \
CUB_SCALED_BLOCK_THREADS(NOMINAL_4B_BLOCK_THREADS, T, 200), \
CUB_SCALED_ITEMS_PER_THREAD(NOMINAL_4B_ITEMS_PER_THREAD, NOMINAL_4B_BLOCK_THREADS, T, 200)
#endif
#endif // Do not document
} // CUB namespace
CUB_NS_POSTFIX // Optional outer namespace(s)
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