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3.7.6, 3.7.7 Optimize multiexp implementations

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This commit is contained in:
Luke Parker
2023-03-02 06:12:02 -05:00
parent e5329b42e6
commit 1d2ebdca62
2 changed files with 35 additions and 13 deletions
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18
crypto/multiexp/src/straus.rs
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@@ -31,8 +31,10 @@ where
let mut res = G::identity();
for b in (0 .. groupings[0].len()).rev() {
for _ in 0 .. window {
res = res.double();
if b != (groupings[0].len() - 1) {
for _ in 0 .. window {
res = res.double();
}
}
for s in 0 .. tables.len() {
@@ -51,20 +53,24 @@ where
let groupings = prep_bits(pairs, window);
let tables = prep_tables(pairs, window);
let mut res = G::identity();
let mut res: Option<G> = None;
for b in (0 .. groupings[0].len()).rev() {
if b != (groupings[0].len() - 1) {
for _ in 0 .. window {
res = res.double();
res = res.map(|res| res.double());
}
}
for s in 0 .. tables.len() {
if groupings[s][b] != 0 {
res += tables[s][usize::from(groupings[s][b])];
if let Some(res) = res.as_mut() {
*res += tables[s][usize::from(groupings[s][b])];
} else {
res = Some(tables[s][usize::from(groupings[s][b])]);
}
}
}
}
res
res.unwrap_or_else(G::identity)
}