parent
666a5397c4
commit
1caeeb357d
@ -0,0 +1,62 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include <arm_neon.h>
|
||||
|
||||
#define SIZE 1024
|
||||
|
||||
void vector_add(float* A, float* B, float* C, int size) {
|
||||
int i;
|
||||
for (i = 0; i < size; i++) {
|
||||
C[i] = A[i] + B[i];
|
||||
}
|
||||
}
|
||||
|
||||
void vector_add_optimized(float* A, float* B, float* C, int size) {
|
||||
int i;
|
||||
for (i = 0; i < size - 3; i += 4) {
|
||||
float32x4_t a_vec = vld1q_f32(&A[i]);
|
||||
float32x4_t b_vec = vld1q_f32(&B[i]);
|
||||
|
||||
float32x4_t c_vec = vaddq_f32(a_vec, b_vec);
|
||||
|
||||
vst1q_f32(&C[i], c_vec);
|
||||
}
|
||||
|
||||
for (; i < size; i++) {
|
||||
C[i] = A[i] + B[i];
|
||||
}
|
||||
}
|
||||
|
||||
int main() {
|
||||
float A[SIZE];
|
||||
float B[SIZE];
|
||||
float C[SIZE];
|
||||
|
||||
srand((unsigned int)time(NULL));
|
||||
int i;
|
||||
for (i = 0; i < SIZE; i++) {
|
||||
A[i] = (float)(rand() % 100);
|
||||
B[i] = (float)(rand() % 100);
|
||||
}
|
||||
|
||||
clock_t start, end;
|
||||
|
||||
start = clock();
|
||||
vector_add(A, B, C, SIZE);
|
||||
end = clock();
|
||||
double time_taken_normal = ((double)(end - start)) / CLOCKS_PER_SEC;
|
||||
printf("normal time: %lf s\n", time_taken_normal);
|
||||
|
||||
for (i = 0; i < SIZE; i++) {
|
||||
C[i] = 0;
|
||||
}
|
||||
|
||||
start = clock();
|
||||
vector_add_optimized(A, B, C, SIZE);
|
||||
end = clock();
|
||||
double time_taken_optimized = ((double)(end - start)) / CLOCKS_PER_SEC;
|
||||
printf("NEON time: %lf s\n", time_taken_optimized);
|
||||
|
||||
return 0;
|
||||
}
|
Loading…
Reference in new issue