ref: 8a6a354e22521e7d2d14b8b4c2d1b7a65a0c8d5e dir: /sys/src/ape/lib/ap/math/fmin.c/
#include <math.h> double fmin(double a, double b) { if(isNaN(a)) return b; if(isNaN(b)) return a; return a < b ? a : b; }