derek.holloway
7502bf64a4
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46 lines
1.3 KiB
Common Lisp
46 lines
1.3 KiB
Common Lisp
/*
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* Copyright © Advanced Micro Devices, Inc., or its affiliates.
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*
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* SPDX-License-Identifier: MIT
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*/
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/**
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* @brief Opencl kernel to write into a buffer the values of const integer list
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*
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* @param dst Pointer to an array of 16 unsigned integers (32-bit) i.e. one instance
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* has 16 * 32-bit = 64 bytes
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*
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* @param size Specifies number of uint16 elements in the array
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*
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* @param threads Number of threads running this kernel
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*
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* @note: It is critical that the size of 'dst' be a integral multiple
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* of (threads * sizeof(uint16)). If it is fractional and less than ONE
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* it will lead to accessing memory that is out-of-bounds. If it is fractional
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* more but more than ONE then it will lead to some threads not doing work
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* at all leading to incorrect benchmark computation
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*
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*/
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__kernel void
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write_kernel(__global uint16 *dst,
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ulong size, uint threads) {
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uint16 pval = (uint16)(0xabababab, 0xabababab, 0xabababab, 0xabababab,
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0xabababab, 0xabababab, 0xabababab, 0xabababab,
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0xabababab, 0xabababab, 0xabababab, 0xabababab,
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0xabababab, 0xabababab, 0xabababab, 0xabababab);
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int idx = get_global_id(0);
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__global uint16 *dstEnd = dst + size;
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dst = &dst[idx];
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do {
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*dst = pval;
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dst += threads;
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} while (dst < dstEnd);
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}
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