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#include<simdfuncs.h>
#include<stdio.h>
/*
* A function that checks at runtime which simd accelerations are
* available and calls the best one. Falls
* back to plain C implementation if SIMD is not available.
*/
int main(int argc, char **argv) {
float four[4] = {2.0, 3.0, 4.0, 5.0};
const float expected[4] = {3.0, 4.0, 5.0, 6.0};
void (*fptr)(float[4]) = NULL;
const char *type;
int i;
/* Add here. The first matched one is used so put "better" instruction
* sets at the top.
*/
#if HAVE_AVX2
if(fptr == NULL && avx2_available()) {
fptr = increment_avx2;
type = "AVX2";
}
#endif
#if HAVE_AVX
if(fptr == NULL && avx_available()) {
fptr = increment_avx;
type = "AVX";
}
#endif
#if HAVE_SSE42
if(fptr == NULL && sse42_available()) {
fptr = increment_sse42;
type = "SSE42";
}
#endif
#if HAVE_SSE41
if(fptr == NULL && sse41_available()) {
fptr = increment_sse41;
type = "SSE41";
}
#endif
#if HAVE_SSSE3
if(fptr == NULL && ssse3_available()) {
fptr = increment_ssse3;
type = "SSSE3";
}
#endif
#if HAVE_SSE3
if(fptr == NULL && sse3_available()) {
fptr = increment_sse3;
type = "SSE3";
}
#endif
#if HAVE_SSE2
if(fptr == NULL && sse2_available()) {
fptr = increment_sse2;
type = "SSE2";
}
#endif
#if HAVE_SSE
if(fptr == NULL && sse_available()) {
fptr = increment_sse;
type = "SSE";
}
#endif
#if HAVE_MMX
if(fptr == NULL && mmx_available()) {
fptr = increment_mmx;
type = "MMX";
}
#endif
if(fptr == NULL) {
fptr = increment_fallback;
type = "fallback";
}
printf("Using %s.\n", type);
fptr(four);
for(i=0; i<4; i++) {
if(four[i] != expected[i]) {
printf("Increment function failed, got %f expected %f.\n", four[i], expected[i]);
return 1;
}
}
return 0;
}
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