4 f(vector unsigned char a, vector unsigned char b)
6 return vec_vsububs(a,b);
11 static vector unsigned char zero;
12 check(vec_all_eq(f(((vector unsigned char){2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2}),
13 ((vector unsigned char){2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2})),