ref: 9b2d3ed37a9d58d8ea4692858b47a9f1b03d7e65 dir: /sys/src/libc/port/abs.c/
#include <u.h> #include <libc.h> int abs(int a) { if(a < 0) return -a; return a; } long labs(long a) { if(a < 0) return -a; return a; }