ADD file via upload

vector_matmul_1.c

@@ -0,0 +1,76 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <stdio.h>  
+#include <stdlib.h>  
+#include <time.h>  
+#include <arm_neon.h>  
+
+#define SIZE 1024  
+ 
+void matmul(float** A, float** B, float** C, int n) {
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            C[i][j] = 0;  
+            for (int k = 0; k < n; k++) {
+                C[i][j] += A[i][k] * B[k][j]; 
+            }
+        }
+    }
+}
+
+void matmul_optimized(float** A, float** B, float** C, int n) {
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            float32x4_t vecC = vdupq_n_f32(0);  
+            for (int k = 0; k < n; k += 4) {  
+                float32x4_t vecA = vld1q_f32(&A[i][k]);
+                float32x4_t vecB = vld1q_f32(&B[k][j]);
+
+                vecC = vmlaq_f32(vecC, vecA, vecB);
+            }
+            C[i][j] = vgetq_lane_f32(vecC, 0) + vgetq_lane_f32(vecC, 1) +
+                vgetq_lane_f32(vecC, 2) + vgetq_lane_f32(vecC, 3);
+        }
+    }
+}
+
+
+int main() {
+    float** A = (float**)malloc(SIZE * sizeof(float*));
+    float** B = (float**)malloc(SIZE * sizeof(float*));
+    float** C = (float**)malloc(SIZE * sizeof(float*));
+
+    for (int i = 0; i < SIZE; i++) {
+        A[i] = (float*)malloc(SIZE * sizeof(float));
+        B[i] = (float*)malloc(SIZE * sizeof(float));
+        C[i] = (float*)malloc(SIZE * sizeof(float));
+    }
+
+    srand((unsigned)time(NULL));
+
+    for (int i = 0; i < SIZE; i++) {
+        for (int j = 0; j < SIZE; j++) {
+            A[i][j] = rand() % 100;  
+            B[i][j] = rand() % 100;  
+        }
+    }
+
+    clock_t start = clock();  
+
+    matmul(A, B, C, SIZE);
+
+    clock_t end = clock();  
+
+    double time_taken = (double)(end - start) / CLOCKS_PER_SEC;  
+    printf("基础矩阵乘法的运行时间: %f 秒\n", time_taken);
+
+    for (int i = 0; i < SIZE; i++) {
+        free(A[i]);
+        free(B[i]);
+        free(C[i]);
+    }
+    free(A);
+    free(B);
+    free(C);
+
+    return 0;
+}