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org.bouncycastle.math.raw.Nat384 Maven / Gradle / Ivy
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);
}
}
