Enum SumSharing 

pub enum SumSharing {
    Resolve,
    Fold,
}

How a sum that other sums read is lowered.

Variants

Resolve

A sum read more than once resolves to binary once and every reader reads the resolved word: the fewest adders.

Fold

Every add or subtract that reads a sum of at most FOLD_ROW_LIMIT words takes the sum’s rows into its own, so no carry-propagate add waits on another; the sum still resolves for any reader that is not an add or a subtract (a compare’s overflow fix reads its sign), and every op is emitted once. More adders, each one carry chain from the inputs: the lowering for standard cells, where every carry chain in series costs its full delay.

Trait Implementations

impl Clone for SumSharing

fn clone(&self) -> SumSharing

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SumSharing

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for SumSharing

fn eq(&self, other: &SumSharing) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for SumSharing

impl Eq for SumSharing

impl StructuralPartialEq for SumSharing