Function dbl [src]

Double an Edwards25519 point.

Prototype

pub fn dbl(p: Edwards25519) Edwards25519

Parameters

p: Edwards25519

Source

  pub fn dbl(p: Edwards25519) Edwards25519 {
    const t0 = p.x.add(p.y).sq();
    var x = p.x.sq();
    var z = p.y.sq();
    const y = z.add(x);
    z = z.sub(x);
    x = t0.sub(y);
    const t = p.z.sq2().sub(z);
    return .{
        .x = x.mul(t),
        .y = y.mul(z),
        .z = z.mul(t),
        .t = x.mul(y),
    };
}  