public static void Square(uint[] x, uint[] z)
{
uint[] tt = Nat192.CreateExt();
Nat192.Square(x, tt);
Reduce(tt, z);
}
public static void Multiply(uint[] x, uint[] y, uint[] z)
{
uint[] tt = Nat192.CreateExt();
Nat192.Mul(x, y, tt);
Reduce(tt, z);
}
public static void Reduce(uint[] xx, uint[] z)
{
ulong xx06 = xx[6], xx07 = xx[7], xx08 = xx[8];
ulong xx09 = xx[9], xx10 = xx[10], xx11 = xx[11];
ulong t0 = xx06 + xx10;
ulong t1 = xx07 + xx11;
ulong cc = 0;
cc += (ulong)xx[0] + t0;
uint z0 = (uint)cc;
cc >>= 32;
cc += (ulong)xx[1] + t1;
z[1] = (uint)cc;
cc >>= 32;
t0 += xx08;
t1 += xx09;
cc += (ulong)xx[2] + t0;
ulong z2 = (uint)cc;
cc >>= 32;
cc += (ulong)xx[3] + t1;
z[3] = (uint)cc;
cc >>= 32;
t0 -= xx06;
t1 -= xx07;
cc += (ulong)xx[4] + t0;
z[4] = (uint)cc;
cc >>= 32;
cc += (ulong)xx[5] + t1;
z[5] = (uint)cc;
cc >>= 32;
z2 += cc;
cc += z0;
z[0] = (uint)cc;
cc >>= 32;
if (cc != 0)
{
cc += z[1];
z[1] = (uint)cc;
z2 += cc >> 32;
}
z[2] = (uint)z2;
cc = z2 >> 32;
Debug.Assert(cc == 0 || cc == 1);
if ((cc != 0 && Nat.IncAt(6, z, 3) != 0) ||
(z[5] == P5 && Nat192.Gte(z, P)))
{
AddPInvTo(z);
}
}