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49 lines
1008 B
49 lines
1008 B
#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 1024
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void vector_add_optimized(float* A, float* B, float* C, int size) {
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int i;
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for (i = 0; i < size - 3; i += 4) {
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float32x4_t A_vec = vld1q_f32(A + i);
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float32x4_t B_vec = vld1q_f32(B + i);
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float32x4_t C_vec = vaddq_f32(A_vec, B_vec);
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vst1q_f32(C + i, C_vec);
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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[SIZE], B[SIZE], C[SIZE];
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srand(time(NULL));
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for (int i = 0; i < SIZE; i++) {
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A[i] = rand() % 100;
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B[i] = rand() % 100;
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}
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clock_t start, end;
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start = clock();
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vector_add_optimized(A, B, C, SIZE);
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end = clock();
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double time_spent = (double)(end - start) / CLOCKS_PER_SEC;
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printf("NEON优化向量加法的运行时间为: %lf 秒\n", time_spent);
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return 0;
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} |