sqrt2
#define sqrt2 vccast(sqrt2)
r+=t/(sqrt2+sqrt(2.0+t));
vc(sqrt2, 1.4142135623730950622E0 ,04f3,40b5,de65,33f9, 1, .B504F333F9DE65)
ic(sqrt2, 1.4142135623730951455E0 , 0, 1.6A09E667F3BCD)
vc(sqrt2, 1.4142135623730950622E0 ,04f3,40b5,de65,33f9, 1, .B504F333F9DE65)
ic(sqrt2, 1.4142135623730951455E0, 0, 1.6A09E667F3BCD)
#define sqrt2 vccast(sqrt2)
if(z+t >= sqrt2 )