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ff: Add PrimeField: From<u64> constraint

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This commit is contained in:
Jack Grigg
2020-03-27 23:19:58 +13:00
parent b6457a905b
commit fd79de5408
11 changed files with 50 additions and 37 deletions
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16
zcash_primitives/src/jubjub/fs.rs
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@@ -278,6 +278,15 @@ impl ::std::fmt::Display for Fs {
}
}
impl From<u64> for Fs {
#[inline(always)]
fn from(val: u64) -> Fs {
let mut raw = [0u64; 4];
raw[0] = val;
Fs(FsRepr(raw)) * Fs(R2)
}
}
impl From<Fs> for FsRepr {
fn from(e: Fs) -> FsRepr {
e.into_repr()
@@ -514,7 +523,7 @@ impl Field for Fs {
#[inline]
fn zero() -> Self {
Fs(FsRepr::from(0))
Fs::from(0)
}
#[inline]
@@ -1683,10 +1692,7 @@ fn test_fs_num_bits() {
#[test]
fn test_fs_root_of_unity() {
assert_eq!(Fs::S, 1);
assert_eq!(
Fs::multiplicative_generator(),
Fs::from_repr(FsRepr::from(6)).unwrap()
);
assert_eq!(Fs::multiplicative_generator(), Fs::from(6));
assert_eq!(
Fs::multiplicative_generator().pow_vartime([
0x684b872f6b7b965bu64,