67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/**
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* Copyright (c) 2023, The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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// Original source: /system/extras/cpu_loads/simd.cpp by Tim Murray
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#include <arpa/inet.h>
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#include <cutils/sockets.h>
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#include <hardware/gralloc.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <algorithm>
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#include <fstream>
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#include <iostream>
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#include <numeric>
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#include <string>
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#include <tuple>
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#include <vector>
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#define EIGEN_RUNTIME_NO_MALLOC
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#include <Eigen/Dense>
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/*
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* Multiplies matrix B and C and adds the result to matrix A for m iterations.
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*/
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int main(int, char**) {
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int N = 4096;
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Eigen::MatrixXd a(N, N);
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Eigen::MatrixXd b(N, N);
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Eigen::MatrixXd c(N, N);
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for (int i = 0; i < N; i++) {
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for (int j = 0; j < N; j++) {
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a(i, j) = 1 + i * j;
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b(i, j) = 2 + i * j;
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c(i, j) = 3 + i * j;
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}
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}
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int m = 5;
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std::cout << "starting matrix multiplication (N: " << N << ", iters: " << m << ")" << std::endl;
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for (int i = 0; i < m; ++i) {
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a.noalias() += (b * c);
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b(1, 5) += 5.0;
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c(5, 1) -= 5.0;
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}
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return 0;
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}
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