ref: 8b59286ef1d9bef6c2c7b248ab0b8072e25ec9cf 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; }