partial_map.h File Reference

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
void	partial_map_top (netlist_t *netlist)
void	instantiate_add_w_carry (nnode_t *node, short mark, netlist_t *netlist)

---

Function Documentation

void instantiate_add_w_carry	(	nnode_t *	node,
		short	mark,
		netlist_t *	netlist
	)

Definition at line 587 of file partial_map.c.

{
        int width;
        int width_a;
        int width_b;
        int i;
        nnode_t **new_add_cells;
        nnode_t **new_carry_cells;

        oassert(node->num_input_pins > 0);
        oassert(node->num_input_port_sizes == 2);
        width = node->output_port_sizes[0];
        width_a = node->input_port_sizes[0];
        width_b = node->input_port_sizes[1];

        new_add_cells = (nnode_t**)malloc(sizeof(nnode_t*)*width);
        new_carry_cells = (nnode_t**)malloc(sizeof(nnode_t*)*width);

        /* create the adder units and the zero unit */
        for (i = 0; i < width; i++)
        {
                new_add_cells[i] = make_3port_gate(ADDER_FUNC, 1, 1, 1, 1, node, mark);
                if (i < width - 1)
                {
                        new_carry_cells[i] = make_3port_gate(CARRY_FUNC, 1, 1, 1, 1, node, mark);
                }
        }

        /* ground first carry in */
        add_a_input_pin_to_node_spot_idx(new_add_cells[0], get_a_zero_pin(netlist), 0);
        if (i > 1)
        {
                add_a_input_pin_to_node_spot_idx(new_carry_cells[0], get_a_zero_pin(netlist), 0);
        }

        /* connect inputs */
        for(i = 0; i < width; i++)
        {
                if (i < width_a)
                {
                        /* join the A port up to adder */
                        remap_pin_to_new_node(node->input_pins[i], new_add_cells[i], 1);
                        if (i < width - 1)
                                add_a_input_pin_to_node_spot_idx(new_carry_cells[i], copy_input_npin(new_add_cells[i]->input_pins[1]), 1);
                }
                else 
                {
                        add_a_input_pin_to_node_spot_idx(new_add_cells[i], get_a_zero_pin(netlist), 1);
                        if (i < width - 1)
                                add_a_input_pin_to_node_spot_idx(new_carry_cells[i], get_a_zero_pin(netlist), 1);
                }

                if (i < width_b)
                {
                        /* join the B port up to adder */
                        remap_pin_to_new_node(node->input_pins[i+width_a], new_add_cells[i], 2);
                        if (i < width - 1)
                                add_a_input_pin_to_node_spot_idx(new_carry_cells[i], copy_input_npin(new_add_cells[i]->input_pins[2]), 2);
                }
                else
                {
                        add_a_input_pin_to_node_spot_idx(new_add_cells[i], get_a_zero_pin(netlist), 2);
                        if (i < width - 1)
                                add_a_input_pin_to_node_spot_idx(new_carry_cells[i], get_a_zero_pin(netlist), 2);
                }

                /* join that gate to the output */
                remap_pin_to_new_node(node->output_pins[i], new_add_cells[i], 0);
        }
        
        /* connect carry outs with carry ins */
        for(i = 1; i < width; i++)
        {
                connect_nodes(new_carry_cells[i-1], 0, new_add_cells[i], 0);
                if (i < width - 1)
                        connect_nodes(new_carry_cells[i-1], 0, new_carry_cells[i], 0);
        }

        free(new_add_cells);
        free(new_carry_cells);
}

Here is the call graph for this function:

Here is the caller graph for this function:

void partial_map_top

(

netlist_t *

netlist

)

Definition at line 61 of file partial_map.c.

{
        /* depending on the output target choose how to do partial mapping */
        if (strcmp(configuration.output_type, "blif") == 0)
        {
                /* do the partial map without any larger structures identified */
                depth_first_traversal_to_partial_map(PARTIAL_MAP_TRAVERSE_VALUE, netlist);      
        }
}

Here is the call graph for this function:

Here is the caller graph for this function: