forked from pi7mcrg2k/operator_optimization
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31 lines
751 B
31 lines
751 B
#include <arm_neon.h>
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#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 vector_add_optimized(float* A, float* B, float* C, int size);
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int main() {
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float A[SIZE], B[SIZE], C[SIZE];
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int i;
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srand(time(0));
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for(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 = clock();
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vector_add_optimized(A, B, C, SIZE);
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clock_t end = clock();
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printf("使用NEON 优化向量加法时间：%lf\n", (double)(end-start) / CLOCKS_PER_SEC);
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}
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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; 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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} |