ref: 6361c0a2f202ae56f70cb4a7e8b6f45d54abe1e8 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; }