ffmpeg/libavcodec/mathops.c

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#include "mathops.h"
#ifdef TEST
#include <stdlib.h>
int main(void)
{
unsigned u;
for(u=0; u<65536; u++) {
unsigned s = u*u;
unsigned root = ff_sqrt(s);
unsigned root_m1 = ff_sqrt(s-1);
if (s && root != u) {
fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);
return 1;
}
if (u && root_m1 != u - 1) {
fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);
return 1;
}
}
return 0;
}
#endif /* TEST */