protected static void ImplMultiply(ulong[] x, ulong[] y, ulong[] zz)
{
ulong num = x[0];
ulong num2 = x[1];
ulong num3 = x[2];
num3 = (num2 >> 46 ^ num3 << 18);
num2 = ((num >> 55 ^ num2 << 9) & 36028797018963967uL);
num &= 36028797018963967uL;
ulong num4 = y[0];
ulong num5 = y[1];
ulong num6 = y[2];
num6 = (num5 >> 46 ^ num6 << 18);
num5 = ((num4 >> 55 ^ num5 << 9) & 36028797018963967uL);
num4 &= 36028797018963967uL;
ulong[] array = new ulong[10];
SecT163Field.ImplMulw(num, num4, array, 0);
SecT163Field.ImplMulw(num3, num6, array, 2);
ulong num7 = num ^ num2 ^ num3;
ulong num8 = num4 ^ num5 ^ num6;
SecT163Field.ImplMulw(num7, num8, array, 4);
ulong num9 = num2 << 1 ^ num3 << 2;
ulong num10 = num5 << 1 ^ num6 << 2;
SecT163Field.ImplMulw(num ^ num9, num4 ^ num10, array, 6);
SecT163Field.ImplMulw(num7 ^ num9, num8 ^ num10, array, 8);
ulong num11 = array[6] ^ array[8];
ulong num12 = array[7] ^ array[9];
ulong num13 = num11 << 1 ^ array[6];
ulong num14 = num11 ^ num12 << 1 ^ array[7];
ulong num15 = num12;
ulong num16 = array[0];
ulong num17 = array[1] ^ array[0] ^ array[4];
ulong num18 = array[1] ^ array[5];
ulong num19 = num16 ^ num13 ^ array[2] << 4 ^ array[2] << 1;
ulong num20 = num17 ^ num14 ^ array[3] << 4 ^ array[3] << 1;
ulong num21 = num18 ^ num15;
num20 ^= num19 >> 55;
num19 &= 36028797018963967uL;
num21 ^= num20 >> 55;
num20 &= 36028797018963967uL;
num19 = (num19 >> 1 ^ (num20 & 1uL) << 54);
num20 = (num20 >> 1 ^ (num21 & 1uL) << 54);
num21 >>= 1;
num19 ^= num19 << 1;
num19 ^= num19 << 2;
num19 ^= num19 << 4;
num19 ^= num19 << 8;
num19 ^= num19 << 16;
num19 ^= num19 << 32;
num19 &= 36028797018963967uL;
num20 ^= num19 >> 54;
num20 ^= num20 << 1;
num20 ^= num20 << 2;
num20 ^= num20 << 4;
num20 ^= num20 << 8;
num20 ^= num20 << 16;
num20 ^= num20 << 32;
num20 &= 36028797018963967uL;
num21 ^= num20 >> 54;
num21 ^= num21 << 1;
num21 ^= num21 << 2;
num21 ^= num21 << 4;
num21 ^= num21 << 8;
num21 ^= num21 << 16;
num21 ^= num21 << 32;
zz[0] = num16;
zz[1] = (num17 ^ num19 ^ array[2]);
zz[2] = (num18 ^ num20 ^ num19 ^ array[3]);
zz[3] = (num21 ^ num20);
zz[4] = (num21 ^ array[2]);
zz[5] = array[3];
SecT163Field.ImplCompactExt(zz);
}