use core::ops::{Add, AddAssign};
use crate::modular::add::add_montgomery_form;
use super::DynResidue;
impl<const LIMBS: usize> DynResidue<LIMBS> {
pub const fn add(&self, rhs: &Self) -> Self {
Self {
montgomery_form: add_montgomery_form(
&self.montgomery_form,
&rhs.montgomery_form,
&self.residue_params.modulus,
),
residue_params: self.residue_params,
}
}
}
impl<const LIMBS: usize> Add<&DynResidue<LIMBS>> for &DynResidue<LIMBS> {
type Output = DynResidue<LIMBS>;
fn add(self, rhs: &DynResidue<LIMBS>) -> DynResidue<LIMBS> {
debug_assert_eq!(self.residue_params, rhs.residue_params);
self.add(rhs)
}
}
impl<const LIMBS: usize> Add<DynResidue<LIMBS>> for &DynResidue<LIMBS> {
type Output = DynResidue<LIMBS>;
#[allow(clippy::op_ref)]
fn add(self, rhs: DynResidue<LIMBS>) -> DynResidue<LIMBS> {
self + &rhs
}
}
impl<const LIMBS: usize> Add<&DynResidue<LIMBS>> for DynResidue<LIMBS> {
type Output = DynResidue<LIMBS>;
#[allow(clippy::op_ref)]
fn add(self, rhs: &DynResidue<LIMBS>) -> DynResidue<LIMBS> {
&self + rhs
}
}
impl<const LIMBS: usize> Add<DynResidue<LIMBS>> for DynResidue<LIMBS> {
type Output = DynResidue<LIMBS>;
fn add(self, rhs: DynResidue<LIMBS>) -> DynResidue<LIMBS> {
&self + &rhs
}
}
impl<const LIMBS: usize> AddAssign<&DynResidue<LIMBS>> for DynResidue<LIMBS> {
fn add_assign(&mut self, rhs: &DynResidue<LIMBS>) {
*self = *self + rhs;
}
}
impl<const LIMBS: usize> AddAssign<DynResidue<LIMBS>> for DynResidue<LIMBS> {
fn add_assign(&mut self, rhs: DynResidue<LIMBS>) {
*self += &rhs;
}
}
#[cfg(test)]
mod tests {
use crate::{
modular::runtime_mod::{DynResidue, DynResidueParams},
U256,
};
#[test]
fn add_overflow() {
let params = DynResidueParams::new(&U256::from_be_hex(
"ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551",
));
let x =
U256::from_be_hex("44acf6b7e36c1342c2c5897204fe09504e1e2efb1a900377dbc4e7a6a133ec56");
let mut x_mod = DynResidue::new(&x, params);
let y =
U256::from_be_hex("d5777c45019673125ad240f83094d4252d829516fac8601ed01979ec1ec1a251");
let y_mod = DynResidue::new(&y, params);
x_mod += &y_mod;
let expected =
U256::from_be_hex("1a2472fde50286541d97ca6a3592dd75beb9c9646e40c511b82496cfc3926956");
assert_eq!(expected, x_mod.retrieve());
}
}