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https://github.com/tesseract-ocr/tesseract.git
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45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
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///////////////////////////////////////////////////////////////////////
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// File: intsindmatrixsse.cpp
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// Description: SSE implementation of 8-bit int SIMD matrix multiply.
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// Author: Ray Smith
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// Created: Tue Aug 23 13:58:49 PST 2017
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//
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// (C) Copyright 2017, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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///////////////////////////////////////////////////////////////////////
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#include "intsimdmatrixsse.h"
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#include <stdint.h>
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#include <vector>
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#include "dotproductsse.h"
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namespace tesseract {
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#ifdef __SSE4_1__
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// Computes part of matrix.vector v = Wu. Computes 1 result.
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static void PartialMatrixDotVector1(const int8_t* wi, const double* scales,
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const int8_t* u, int num_in, int num_out,
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double* v) {
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int total = IntDotProductSSE(u, wi, num_in);
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// Add in the bias and correct for integer values.
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*v = (static_cast<double>(total) / MAX_INT8 + wi[num_in]) * *scales;
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}
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#endif // __SSE4_1__
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IntSimdMatrixSSE::IntSimdMatrixSSE() {
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#ifdef __SSE4_1__
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partial_funcs_ = {PartialMatrixDotVector1};
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#endif // __SSE4_1__
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}
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} // namespace tesseract.
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