57 řádky
2.0 KiB
C++
57 řádky
2.0 KiB
C++
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// MIT License
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//
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// Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// undefine NDEBUG so asserts are implemented
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#ifdef NDEBUG
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# undef NDEBUG
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#endif
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#include <cstdint>
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#include "hip/hip_runtime.h"
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#define SHM_SIZE 64
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__global__ void
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looping_lds_kernel(float* __restrict__ a,
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const float* __restrict__ b,
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const float* __restrict__ c,
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size_t size,
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size_t loopcount)
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{
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__shared__ float interm[SHM_SIZE];
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size_t index = blockDim.x * blockIdx.x + threadIdx.x;
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for(size_t i = index; i < size; i += blockDim.x * gridDim.x)
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interm[threadIdx.x % SHM_SIZE] = b[index] + threadIdx.x;
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for(size_t it = 0; it < loopcount; it++)
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{
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__syncthreads();
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float value = interm[(it + threadIdx.x + SHM_SIZE / 2) % SHM_SIZE];
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__syncthreads();
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interm[threadIdx.x % SHM_SIZE] += value;
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}
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a[index] = interm[threadIdx.x % SHM_SIZE] + c[index];
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}
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