ref: 8b6ec7da32b39b2f1af45b6f6dff4cc9e836d5ac 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; }