ref: 8e3d8103da0d4dd7f5b4ea2e1745e82d4af8cd45 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; }