1 2 3 4 5 6 7 8 9 10 11 12 13
#include <math.h> double fmin(double x, double y) { if (isnan(x)) return y; if (isnan(y)) return x; /* handle signed zeros, see C99 Annex F.9.9.2 */ if (signbit(x) != signbit(y)) return signbit(x) ? x : y; return x < y ? x : y; }