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53 lines
1.1 KiB
53 lines
1.1 KiB
#include <stdio.h>
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#include <time.h>
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#include <stdlib.h>
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#define SIZE 1024
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void matmul_optimized(float** A, float** B, float** C, int n);
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int main() {
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int n = SIZE;
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// 分配内存空间
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float** A = (float**)malloc(sizeof(float*) * n);
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float** B = (float**)malloc(sizeof(float*) * n);
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float** C = (float**)malloc(sizeof(float*) * n);
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int i, j;
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for(i=0; i<n; i++) {
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A[i] = (float*)malloc(sizeof(float) * n);
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B[i] = (float*)malloc(sizeof(float) * n);
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C[i] = (float*)malloc(sizeof(float) * n);
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}
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// 随机化
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srand(time(0));
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for(i=0; i<n; i++)
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for(j=0; j<n; j++) {
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A[i][j] = rand() % 100;
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B[i][j] = rand() % 100;
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}
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// 计算并计时
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clock_t start = clock();
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matmul_optimized(A, B, C, SIZE);
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clock_t end = clock();
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printf("初始向量乘法时间：%lf\n", (double)(end-start) / CLOCKS_PER_SEC);
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// 释放内存空间
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for(i=0; i<n; i++) {
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free(A[i]);
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free(B[i]);
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free(C[i]);
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}
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free(A); free(B); free(C);
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}
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void matmul_optimized(float** A, float** B, float** C, int n) {
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int i, j, k;
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for(i=0; i<n; i++)
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for(j=0; j<n; j++) {
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C[i][j] = 0;
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for(k=0; k<n; k++) {
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C[i][j] = A[i][k] * B[k][j];
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}
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}
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} |