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Remove AVX2 fixed-base code.

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This was faster than the non-AVX2 code, but the serial code is already so fast that there's no reason not to use it.
This commit is contained in:
Henry de Valence 2018-03-26 17:05:54 -07:00
parent 0c4e7188a0
commit c73a0fd0d6
1 changed files with 0 additions and 50 deletions
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50
src/backend/avx2/edwards.rs
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@ -383,56 +383,6 @@ impl From<ExtendedPoint> for LookupTable<CachedPoint> {
}
}
#[derive(Clone)]
pub struct EdwardsBasepointTable(pub [LookupTable<CachedPoint>; 32]);
impl<'a, 'b> Mul<&'b Scalar> for &'a EdwardsBasepointTable {
type Output = ExtendedPoint;
fn mul(self, scalar: &'b Scalar) -> ExtendedPoint {
let a = scalar.to_radix_16();
let tables = &self.0;
let mut P = ExtendedPoint::identity();
for i in (0..64).filter(|x| x % 2 == 1) {
P = &P + &tables[i/2].select(a[i]);
}
P = P.mul_by_pow_2(4);
for i in (0..64).filter(|x| x % 2 == 0) {
P = &P + &tables[i/2].select(a[i]);
}
P
}
}
impl<'a, 'b> Mul<&'a EdwardsBasepointTable> for &'b Scalar {
type Output = ExtendedPoint;
/// Given `self` a table of precomputed multiples of the point `B`, compute `B * s`.
fn mul(self, basepoint_table: &'a EdwardsBasepointTable) -> ExtendedPoint {
basepoint_table * &self
}
}
impl EdwardsBasepointTable {
/// Create a table of precomputed multiples of `basepoint`.
pub fn create(basepoint: &ExtendedPoint) -> EdwardsBasepointTable {
// XXX use init_with
let mut table = EdwardsBasepointTable([LookupTable::default(); 32]);
let mut P = *basepoint;
for i in 0..32 {
// P = (16^2)^i * B
table.0[i] = LookupTable::from(P);
P = P.mul_by_pow_2(8);
}
table
}
}
use scalar_mul::window::OddLookupTable;
impl<'a> From<&'a ExtendedPoint> for OddLookupTable<CachedPoint> {