ADD file via upload

Chen/CHEN_2.c

@@ -0,0 +1,31 @@
+#include <arm_neon.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#define SIZE 1024
+
+void vector_add_optimized(float* A, float* B, float* C, int size);
+int main() {
+	float A[SIZE], B[SIZE], C[SIZE];
+	int i;
+	srand(time(0));
+	for(i=0; i<SIZE; i++) {
+		A[i] = rand() % 100;
+		B[i] = rand() % 100;
+	}
+
+	clock_t start = clock();
+	vector_add_optimized(A, B, C, SIZE);
+	clock_t end = clock();
+	printf("使用NEON 优化向量加法时间：%lf\n", (double)(end-start) / CLOCKS_PER_SEC);
+}
+
+void vector_add_optimized(float* A, float* B, float* C, int size) {
+	int i;
+	for(i=0; i<size; i+=4) {
+		float32x4_t vecA = vld1q_f32(&A[i]);
+		float32x4_t vecB = vld1q_f32(&B[i]);
+		float32x4_t vecC = vaddq_f32(vecA, vecB);
+		vst1q_f32(&C[i], vecC);
+	}
+}