pub fn cast_base_mut<FSub, P>(packed: &mut P) -> &mut PackedSubfield<P, FSub>where
FSub: BinaryField,
P: PackedField<Scalar: ExtensionField<FSub>> + UnderlierView,
PackedSubfield<P, FSub>: PackedField<Scalar = FSub>,Expand description
Reads a packed extension field element in place as a packed subfield element.