| package org.bouncycastle.math.raw; |
| |
| |
| public abstract class Nat384 |
| { |
| public static void mul(int[] x, int[] y, int[] zz) |
| { |
| Nat192.mul(x, y, zz); |
| Nat192.mul(x, 6, y, 6, zz, 12); |
| |
| int c18 = Nat192.addToEachOther(zz, 6, zz, 12); |
| int c12 = c18 + Nat192.addTo(zz, 0, zz, 6, 0); |
| c18 += Nat192.addTo(zz, 18, zz, 12, c12); |
| |
| int[] dx = Nat192.create(), dy = Nat192.create(); |
| boolean neg = Nat192.diff(x, 6, x, 0, dx, 0) != Nat192.diff(y, 6, y, 0, dy, 0); |
| |
| int[] tt = Nat192.createExt(); |
| Nat192.mul(dx, dy, tt); |
| |
| c18 += neg ? Nat.addTo(12, tt, 0, zz, 6) : Nat.subFrom(12, tt, 0, zz, 6); |
| Nat.addWordAt(24, c18, zz, 18); |
| } |
| |
| public static void square(int[] x, int[] zz) |
| { |
| Nat192.square(x, zz); |
| Nat192.square(x, 6, zz, 12); |
| |
| int c18 = Nat192.addToEachOther(zz, 6, zz, 12); |
| int c12 = c18 + Nat192.addTo(zz, 0, zz, 6, 0); |
| c18 += Nat192.addTo(zz, 18, zz, 12, c12); |
| |
| int[] dx = Nat192.create(); |
| Nat192.diff(x, 6, x, 0, dx, 0); |
| |
| int[] tt = Nat192.createExt(); |
| Nat192.square(dx, tt); |
| |
| c18 += Nat.subFrom(12, tt, 0, zz, 6); |
| Nat.addWordAt(24, c18, zz, 18); |
| } |
| } |