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wasmer/lib/emscripten/emtests/test_simd4.c
2019-01-10 21:38:10 -08:00

40 lines
963 B
C
Vendored

/*
* Copyright 2016 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
#include <xmmintrin.h>
float simdAverage(float *src, int len) {
__m128 sumx4 = _mm_setzero_ps();
for (int i = 0; i < len; i += 4) {
__m128 v = _mm_load_ps(src);
sumx4 = _mm_add_ps(sumx4, v);
src += 4;
}
float sumx4_mem[4];
float *sumx4_ptr = sumx4_mem;
_mm_store_ps(sumx4_ptr, sumx4);
return (sumx4_mem[0] + sumx4_mem[1] +
sumx4_mem[2] + sumx4_mem[3])/len;
}
void initArray(float *src, int len) {
for (int i = 0; i < len; ++i) {
src[i] = 0.1 * i;
}
}
int main() {
const int len = 100000;
float src[len];
float result = 0.0;
initArray(src, len);
result = simdAverage(src, len);
printf("averagex4 result: %.1f\n", result);
}