twom60
u.d = d = twom60 + (zz[0] + zz[1]);
zz[0] -= (d - twom60);
u.d = d = twom60 + (zz[0] + zz[1]);
zz[0] -= (d - twom60);
u.d = d = twom60 + (zz[0] + zz[1]);
zz[0] -= (d - twom60);
twom60 = 8.67361737988403547206e-19,
u.d = twom60 + (s[0] + s[1]);
s[0] -= (u.d - twom60);
return (xf * twom60);