saymrwulf/betrusted-curve25519-dalek-source
1
0
Fork 0
mirror of https://github.com/saymrwulf/betrusted-curve25519-dalek-source.git synced 2026-09-10 21:21:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

move microcode to the Xous side of things

Browse source 
minimizing the mount of data movement speeds up operations by
about 2x
This commit is contained in:
bunnie 2021-06-28 18:31:45 +08:00
parent 41cc7c4ab3
commit 1a79b76e90
1 changed files with 297 additions and 278 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/montgomery.rs
View file

@ -613,6 +613,12 @@ impl<'a, 'b> Mul<&'b Scalar> for &'a MontgomeryPoint {
W: FieldElement::one(),
};
// for now, prefer to use the fully-accelerated version where this code is local to the server
// instead of transmitting it every call with the data...gives about a 2x performance speedup
if false {
#[cfg(not(test))] // due to issue https://github.com/rust-lang/rust/issues/59168, you will have to manually comment this out when running a test on the full system and not just this crate.
log::warn!("wrong multiply being used!");
let mcode = assemble_engine25519!(
start:
// P.U in %20
@ -918,6 +924,19 @@ impl<'a, 'b> Mul<&'b Scalar> for &'a MontgomeryPoint {
} else {
MontgomeryPoint(copy_from_rf(31, &result_rf))
}
} else {
let mut engine = engine_25519::Engine25519::new();
let job = engine_25519::MontgomeryJob {
x0_u: x0.U.to_bytes(),
x0_w: x0.W.to_bytes(),
x1_u: x1.U.to_bytes(),
x1_w: x1.W.to_bytes(),
affine_u: affine_u.to_bytes(),
scalar: scalar.bytes,
};
MontgomeryPoint(engine.montgomery_job(job).expect("couldn't run montgomery multiply job"))
}
}
#[cfg(not(feature = "betrusted"))]
fn mul(self, scalar: &'b Scalar) -> MontgomeryPoint {