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Use `ff::Field::pow_vartime` instead of `FieldExt::pow`

This commit is contained in:
Jack Grigg 2021-09-30 22:54:02 +01:00
parent a5a3c8ca63
commit 17b8fe1baa
1 changed files with 4 additions and 4 deletions
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8
src/arithmetic.rs
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@ -201,7 +201,7 @@ fn serial_fft<G: Group>(a: &mut [G], omega: G::Scalar, log_n: u32) {
let mut m = 1;
for _ in 0..log_n {
let w_m = omega.pow(&[u64::from(n / (2 * m)), 0, 0, 0]);
let w_m = omega.pow_vartime(&[u64::from(n / (2 * m)), 0, 0, 0]);
let mut k = 0;
while k < n {
@ -228,7 +228,7 @@ fn parallel_fft<G: Group>(a: &mut [G], omega: G::Scalar, log_n: u32, log_threads
let num_threads = 1 << log_threads;
let log_new_n = log_n - log_threads;
let mut tmp = vec![vec![G::group_zero(); 1 << log_new_n]; num_threads];
let new_omega = omega.pow(&[num_threads as u64, 0, 0, 0]);
let new_omega = omega.pow_vartime(&[num_threads as u64, 0, 0, 0]);
multicore::scope(|scope| {
let a = &*a;
@ -236,8 +236,8 @@ fn parallel_fft<G: Group>(a: &mut [G], omega: G::Scalar, log_n: u32, log_threads
for (j, tmp) in tmp.iter_mut().enumerate() {
scope.spawn(move |_| {
// Shuffle into a sub-FFT
let omega_j = omega.pow(&[j as u64, 0, 0, 0]);
let omega_step = omega.pow(&[(j as u64) << log_new_n, 0, 0, 0]);
let omega_j = omega.pow_vartime(&[j as u64, 0, 0, 0]);
let omega_step = omega.pow_vartime(&[(j as u64) << log_new_n, 0, 0, 0]);
let mut elt = G::Scalar::one();