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[refactor] Use explicit wrapping addition in Fp*::mul_assign #2533

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[refactor] Use explicit wrapping addition in Fp*::mul_assign #2533

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8 changes: 4 additions & 4 deletions fields/src/fp_256.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -767,7 +767,7 @@ impl<'a, P: Fp256Parameters> MulAssign<&'a Self> for Fp256<P> {

r[3] = fa::mac_with_carry(r[3], (self.0).0[3], (other.0).0[0], &mut carry1);
r[2] = fa::mac_with_carry(r[3], k, P::MODULUS.0[3], &mut carry2);
r[3] = carry1 + carry2;
r[3] = carry1.wrapping_add(carry2);

// Iteration 1.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[1], &mut carry1);
Expand All @@ -781,7 +781,7 @@ impl<'a, P: Fp256Parameters> MulAssign<&'a Self> for Fp256<P> {

r[3] = fa::mac_with_carry(r[3], (self.0).0[3], (other.0).0[1], &mut carry1);
r[2] = fa::mac_with_carry(r[3], k, P::MODULUS.0[3], &mut carry2);
r[3] = carry1 + carry2;
r[3] = carry1.wrapping_add(carry2);

// Iteration 2.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[2], &mut carry1);
Expand All @@ -795,7 +795,7 @@ impl<'a, P: Fp256Parameters> MulAssign<&'a Self> for Fp256<P> {

r[3] = fa::mac_with_carry(r[3], (self.0).0[3], (other.0).0[2], &mut carry1);
r[2] = fa::mac_with_carry(r[3], k, P::MODULUS.0[3], &mut carry2);
r[3] = carry1 + carry2;
r[3] = carry1.wrapping_add(carry2);

// Iteration 3.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[3], &mut carry1);
Expand All @@ -809,7 +809,7 @@ impl<'a, P: Fp256Parameters> MulAssign<&'a Self> for Fp256<P> {

r[3] = fa::mac_with_carry(r[3], (self.0).0[3], (other.0).0[3], &mut carry1);
r[2] = fa::mac_with_carry(r[3], k, P::MODULUS.0[3], &mut carry2);
r[3] = carry1 + carry2;
r[3] = carry1.wrapping_add(carry2);

(self.0).0 = r;
self.reduce();
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12 changes: 6 additions & 6 deletions fields/src/fp_384.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -790,7 +790,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[0], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

// Iteration 1.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[1], &mut carry1);
Expand All @@ -810,7 +810,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[1], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

// Iteration 2.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[2], &mut carry1);
Expand All @@ -830,7 +830,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[2], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

// Iteration 3.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[3], &mut carry1);
Expand All @@ -850,7 +850,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[3], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

// Iteration 4.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[4], &mut carry1);
Expand All @@ -870,7 +870,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[4], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

// Iteration 5.
r[0] = fa::mac(r[0], (self.0).0[0], (other.0).0[5], &mut carry1);
Expand All @@ -890,7 +890,7 @@ impl<'a, P: Fp384Parameters> MulAssign<&'a Self> for Fp384<P> {

r[5] = fa::mac_with_carry(r[5], (self.0).0[5], (other.0).0[5], &mut carry1);
r[4] = fa::mac_with_carry(r[5], k, P::MODULUS.0[5], &mut carry2);
r[5] = carry1 + carry2;
r[5] = carry1.wrapping_add(carry2);

(self.0).0 = r;
self.reduce();
Expand Down