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[barrett]: some cleaning toward more generic code

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This commit is contained in:
Jean-Philippe Bossuat
2024-12-06 10:52:18 +01:00
parent ed2f028df5
commit a24ad55adc
3 changed files with 9 additions and 16 deletions
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7
src/modulus/barrett.rs
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@@ -25,10 +25,9 @@ impl<O> BarrettPrecomp<O>{
impl BarrettPrecomp<u64>{
pub fn new(q: u64) -> BarrettPrecomp<u64> {
let mut big_r = BigUint::parse_bytes(b"100000000000000000000000000000000", 16).unwrap();
big_r = big_r / BigUint::from(q);
let lo = (&big_r & BigUint::from(u64::MAX)).to_u64().unwrap();
let hi = (big_r >> 64u64).to_u64().unwrap();
let big_r: BigUint = (BigUint::from(1 as usize)<<((u64::BITS<<1) as usize)) / BigUint::from(q);
let lo: u64 = (&big_r & BigUint::from(u64::MAX)).to_u64().unwrap();
let hi: u64 = (big_r >> u64::BITS).to_u64().unwrap();
Self{q, lo, hi}
}