T0
#define Skein_Set_T0(ctxPtr, T0) Skein_Set_Tweak(ctxPtr, 0, T0)
#define Skein_Set_T0_T1(ctxPtr, T0, T1) \
Skein_Set_T0(ctxPtr, (T0)); \
z = (x * T0) * (T1 + x * x);
z = (y * T0) * (T1 + y * y);
z = (y * T0) * (T1 + y * y);
return ((float)((y * T0) * (T1 + y * y)));