switch back to arkworks field arithmetic for 64-bit backend

CHANGELOG.md

@@ -60,3 +60,6 @@
 * add power impl and expose `Fq::from_montgomery_limbs` by @redshiftzero in #98
 * Add missing conversion trait implementations by @neithanmo in #97
 
+# 0.10.0
+
+* Use Arkworks field arithmetic for the 64-bit backend by @redshiftzero in #102

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "decaf377"
-version = "0.9.0"
+version = "0.10.0"
 authors = [
     "Henry de Valence <[email protected]>",
     "redshiftzero <[email protected]>",

src/fields/fp.rs

@@ -7,13 +7,16 @@ use crate::EncodingError;
 pub mod arkworks;
 mod ops;
 mod u32;
+
+// The u64 backend requires arkworks
+#[cfg(feature = "arkworks")]
 mod u64;
 
 cfg_if! {
-    if #[cfg(feature = "u32_backend")] {
-        pub type Fp = u32::Fp;
-    } else {
+    if #[cfg(feature = "arkworks")] {
         pub type Fp = u64::Fp;
+    } else {
+        pub type Fp = u32::Fp;
     }
 }
 

src/fields/fp/u64.rs

@@ -1,4 +1,3 @@
-pub mod fiat;
 pub mod wrapper;
 
 pub use wrapper::Fp;