Clarify masking of bits in Field::random impls

Co-Authored-By: Daira Hopwood <[email protected]>
zcash · Jul 26, 2019 · 0255dca · 0255dca
1 parent c4e14ad
commit 0255dca
Show file tree

Hide file tree

Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/ff/ff_derive/src/lib.rs b/ff/ff_derive/src/lib.rs
@@ -892,7 +892,7 @@ fn prime_field_impl(
                         #name(#repr(repr))
                     };
 
-                    // Mask away the unused bits at the beginning.
+                    // Mask away the unused most-significant bits.
                     tmp.0.as_mut()[#top_limb_index] &= 0xffffffffffffffff >> REPR_SHAVE_BITS;
 
                     if tmp.is_valid() {

diff --git a/sapling-crypto/src/jubjub/fs.rs b/sapling-crypto/src/jubjub/fs.rs
@@ -292,7 +292,7 @@ impl Field for Fs {
                 Fs(FsRepr(repr))
             };
 
-            // Mask away the unused bits at the beginning.
+            // Mask away the unused most-significant bits.
             tmp.0.as_mut()[3] &= 0xffffffffffffffff >> REPR_SHAVE_BITS;
 
             if tmp.is_valid() {