Struct libreda_pnr::util::buffer_removal::BufferRemover

pub struct BufferRemover {
    non_inverting_buffer_cells: HashSet<String>,
    inverting_buffer_cells: HashSet<String>,
}

Buffer removal engine. Removes non-inverting buffers and inverting buffers. Buffer cells are identified by name. The names must be specified manually using add_non_inverting_buffer() and add_inverting_buffer().

Fields

non_inverting_buffer_cells: HashSet<String>

inverting_buffer_cells: HashSet<String>

Implementations

impl BufferRemover

pub fn register_non_inverting_buffer(&mut self, name: String)

Register the name of a non-inverting buffer cell.

pub fn register_inverting_buffer(&mut self, name: String)

Register the name of a inverting buffer cell.

fn get_valid_buffer_cells_by_names<N>( &self, netlist: &N, names: &HashSet<String> ) -> HashMap<N::CellId, (N::PinId, N::PinId)>where N: NetlistBase,

Find buffer cells by their name. Take only cells which have exactly one input and one output. Return a hashmap with cell IDs as keys and (input pin, output pin) pairs as values.

pub fn remove_non_inverting_buffers<N>( &self, netlist: &mut N, top: &N::CellId ) -> usizewhere N: NetlistEdit,

Remove all the non-inverting buffers from the top circuit. They are found by the name which is specified using .add_non_inverting_buffer(). Return the number of removed buffer instances.

fn remove_non_inverting_buffer<N>( &self, netlist: &mut N, buffer_instance: &N::CellInstId, input_pin: &N::PinId, output_pin: &N::PinId )where N: NetlistEdit,

Remove a non-inverting buffer cell and merge the nets at the input and output.