mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-14 08:39:27 +08:00
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
|
///////////////////////////////////////////////////////////////////////
|
||
|
|
// File: intsindmatrixsse.cpp
|
||
|
|
// Description: SSE implementation of 8-bit int SIMD matrix multiply.
|
||
|
|
// Author: Ray Smith
|
||
|
|
// Created: Tue Aug 23 13:58:49 PST 2017
|
||
|
|
//
|
||
|
|
// (C) Copyright 2017, Google Inc.
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
///////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#include "intsimdmatrixsse.h"
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <vector>
|
||
|
|
#include "dotproductsse.h"
|
||
|
|
|
||
|
|
namespace tesseract {
|
||
|
|
|
||
|
|
#ifdef __SSE4_1__
|
||
|
|
// Computes part of matrix.vector v = Wu. Computes 1 result.
|
||
|
|
static void PartialMatrixDotVector1(const int8_t* wi, const double* scales,
|
||
|
|
const int8_t* u, int num_in, int num_out,
|
||
|
|
double* v) {
|
||
|
|
int total = IntDotProductSSE(u, wi, num_in);
|
||
|
|
// Add in the bias and correct for integer values.
|
||
|
|
*v = (static_cast<double>(total) / MAX_INT8 + wi[num_in]) * *scales;
|
||
|
|
}
|
||
|
|
#endif // __SSE4_1__
|
||
|
|
|
||
|
|
IntSimdMatrixSSE::IntSimdMatrixSSE() {
|
||
|
|
#ifdef __SSE4_1__
|
||
|
|
partial_funcs_ = {PartialMatrixDotVector1};
|
||
|
|
#endif // __SSE4_1__
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace tesseract.
|