package main

import (
	"fmt"
)

func abs(i uint8, j uint8) uint8 {
	d := int16(i) - int16(j)
	mask := d >> 15
	return uint8((d + mask) ^ mask)
}

func main() {
	var i, j uint8
	i = 12
	j = 253
	fmt.Println(abs(i, j))
}