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60 lines
1.5 KiB
60 lines
1.5 KiB
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <arm_neon.h>
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#define SIZE 10000000
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void vectorAdd(float* A, float* B, float* C, int size) {
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int i;
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for (i = 0; i < size; ++i) {
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C[i] = A[i] + B[i];
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}
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}
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void vectorAddNEON(float* A, float* B, float* C, int size) {
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int i;
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for (i = 0; i <= size - 4; i += 4) {
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float32x4_t vecA = vld1q_f32(&A[i]);
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float32x4_t vecB = vld1q_f32(&B[i]);
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float32x4_t vecC = vaddq_f32(vecA, vecB);
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vst1q_f32(&C[i], vecC);
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}
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for (; i < size; ++i) {
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C[i] = A[i] + B[i];
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}
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}
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int main() {
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float* A = (float*)malloc(SIZE * sizeof(float));
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float* B = (float*)malloc(SIZE * sizeof(float));
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float* C = (float*)malloc(SIZE * sizeof(float));
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if (A == NULL || B == NULL || C == NULL) {
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return 1;
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}
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srand((unsigned)time(NULL));
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for (int i = 0; i < SIZE; ++i) {
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A[i] = (float)(rand() % 100);
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B[i] = (float)(rand() % 100);
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}
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clock_t start_time = clock();
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vectorAdd(A, B, C, SIZE);
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clock_t end_time = clock();
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double time1 = (double)(end_time - start_time) / CLOCKS_PER_SEC;
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printf("tradition: %f", time1);
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start_time = clock();
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vectorAddNEON(A, B, C, SIZE);
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end_time = clock();
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time1 = (double)(end_time - start_time) / CLOCKS_PER_SEC;
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printf("NEON %f",time1);
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free(A);
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free(B);
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free(C);
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}
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