ref: 2c8f291db2f04b4f87c01fcd3344c8d2fb1f8e89 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; }