private static void ge_p3_dbl(ref ge_p1p1 r, ge_p3 p)
{
ge_p2 q = new()
{
X = stackalloc int[10],
Y = stackalloc int[10],
Z = stackalloc int[10],
};
ge_p1p1 result = new()
{
X = stackalloc int[10],
Y = stackalloc int[10],
Z = stackalloc int[10],
T = stackalloc int[10],
};
r.X.CopyTo(result.X);
r.Y.CopyTo(result.Y);
r.Z.CopyTo(result.Z);
r.T.CopyTo(result.T);
ge_p3_to_p2(ref q, p);
ge_p2_dbl(ref result, q);
result.X.CopyTo(r.X);
result.Y.CopyTo(r.Y);
result.Z.CopyTo(r.Z);
result.T.CopyTo(r.T);
}
private static void ge_p1p1_to_p3(ref ge_p3 r, ge_p1p1 p)
{
ge_p3 result = new()
{
X = stackalloc int[10],
Y = stackalloc int[10],
Z = stackalloc int[10],
T = stackalloc int[10],
};
r.X.CopyTo(result.X);
r.Y.CopyTo(result.Y);
r.Z.CopyTo(result.Z);
r.T.CopyTo(result.T);
fe_mul(ref result.X, p.X, p.T);
fe_mul(ref result.Y, p.Y, p.Z);
fe_mul(ref result.Z, p.Z, p.T);
fe_mul(ref result.T, p.X, p.Y);
result.X.CopyTo(r.X);
result.Y.CopyTo(r.Y);
result.Z.CopyTo(r.Z);
result.T.CopyTo(r.T);
}
private static void ge_p2_dbl(ref ge_p1p1 r, ge_p2 p)
{
Span <int> t0 = stackalloc int[10];
ge_p1p1 result = new()
{
X = stackalloc int[10],
Y = stackalloc int[10],
Z = stackalloc int[10],
T = stackalloc int[10],
};
r.X.CopyTo(result.X);
r.Y.CopyTo(result.Y);
r.Z.CopyTo(result.Z);
r.T.CopyTo(result.T);
fe_sq(ref result.X, p.X);
fe_sq(ref result.Z, p.Y);
fe_sq2(ref result.T, p.Z);
fe_add(ref result.Y, p.X, p.Y);
fe_sq(ref t0, result.Y);
fe_add(ref result.Y, result.Z, result.X);
fe_sub(ref result.Z, result.Z, result.X);
fe_sub(ref result.X, t0, result.Y);
fe_sub(ref result.T, result.T, result.Z);
result.X.CopyTo(r.X);
result.Y.CopyTo(r.Y);
result.Z.CopyTo(r.Z);
result.T.CopyTo(r.T);
}
private static void ge_msub(ref ge_p1p1 r, ge_p3 p, ge_precomp q)
{
Span <int> t0 = stackalloc int[10];
ge_p1p1 result = new()
{
X = stackalloc int[10],
Y = stackalloc int[10],
Z = stackalloc int[10],
T = stackalloc int[10],
};
r.X.CopyTo(result.X);
r.Y.CopyTo(result.Y);
r.Z.CopyTo(result.Z);
r.T.CopyTo(result.T);
fe_add(ref result.X, p.Y, p.X);
fe_sub(ref result.Y, p.Y, p.X);
fe_mul(ref result.Z, result.X, q.yminusx);
fe_mul(ref result.Y, result.Y, q.yplusx);
fe_mul(ref result.T, q.xy2d, p.T);
fe_add(ref t0, p.Z, p.Z);
fe_sub(ref result.X, result.Z, result.Y);
fe_add(ref result.Y, result.Z, result.Y);
fe_sub(ref result.Z, t0, result.T);
fe_add(ref result.T, t0, result.T);
result.X.CopyTo(r.X);
result.Y.CopyTo(r.Y);
result.Z.CopyTo(r.Z);
result.T.CopyTo(r.T);
}
