ref: 9ebd6f860e9d551e8b1c8f0a0c62bb4c1aa2c268 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; }