#include <vpr_types.h>

Data Fields
float	base_cost
float	saved_base_cost
int	ortho_cost_index
int	seg_index
float	inv_length
float	T_linear
float	T_quadratic
float	C_load

Detailed Description

Data that is pointed to by the .cost_index member of t_rr_node. It's purpose is to store the base_cost so that it can be quickly changed and to store fields that have only a few different values (like seg_index) or whose values should be an average over all rr_nodes of a certain type (like T_linear etc., which are used to predict remaining delay in the timing_driven router).

base_cost: The basic cost of using an rr_node.
ortho_cost_index: The index of the type of rr_node that generally connects to this type of rr_node, but runs in the orthogonal direction (e.g. vertical if the direction of this member is horizontal).
seg_index: Index into segment_inf of this segment type if this type of rr_node is an CHANX or CHANY; OPEN (-1) otherwise.
inv_length: 1/length of this type of segment.
T_linear: Delay through N segments of this type is N * T_linear + N^2 * T_quadratic. For buffered segments all delay is T_linear.
T_quadratic: Dominant delay for unbuffered segments, 0 for buffered segments.
C_load: Load capacitance seen by the driver for each segment added to the chain driven by the driver. 0 for buffered segments.

Definition at line 853 of file vpr_types.h.