78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
/*
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* Copyright (c) 2017, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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
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* in all 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
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* OR 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
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <cstdint>
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#include <algorithm>
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#include "runtime/helpers/ptr_math.h"
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namespace OCLRT {
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union GRF {
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float fRegs[8];
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uint32_t dwRegs[8];
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uint16_t wRegs[16];
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};
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inline size_t getGRFsPerThread(uint32_t simd) {
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return simd == 32 ? 2 : 1;
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}
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inline size_t getThreadsPerWG(uint32_t simd, size_t lws) {
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auto result = lws + simd - 1;
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// Original logic:
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// result = (lws + simd - 1) / simd;
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// This sequence is meant to avoid an CPU DIV instruction.
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result >>= simd == 32
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? 5
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: simd == 16
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? 4
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: 3;
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return result;
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}
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inline size_t getPerThreadSizeLocalIDs(uint32_t simd, uint32_t numChannels = 3) {
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auto numGRFSPerThread = getGRFsPerThread(simd);
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return numChannels * numGRFSPerThread * sizeof(GRF);
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}
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struct LocalIDHelper {
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static void (*generateSimd8)(void *buffer, size_t lwsX, size_t lwsY, size_t threadsPerWorkGroup);
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static void (*generateSimd16)(void *buffer, size_t lwsX, size_t lwsY, size_t threadsPerWorkGroup);
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static void (*generateSimd32)(void *buffer, size_t lwsX, size_t lwsY, size_t threadsPerWorkGroup);
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static LocalIDHelper initializer;
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private:
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LocalIDHelper();
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};
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extern const uint16_t initialLocalID[];
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template <typename Vec, int simd>
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void generateLocalIDsSimd(void *b, size_t lwsX, size_t lwsY, size_t threadsPerWorkGroup);
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void generateLocalIDs(void *buffer, uint32_t simd, size_t lwsX, size_t lwsY, size_t lwsZ);
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} |