Tile-01

This tiling method performance minimal modification in the OpenFPGA generated netlist. After performing base manipulation to convert wires to buses, this tiling scheme merges neighboring instances to form a structure like shown below. This scheme is biased toward the top and right side connections boxes and right-top side switch box, as it merges connection boxes on top and right and sb on the right-top corner for flat design.

The flat design of the merged module allows setting tighter timing constraints on all internal paths.

Detail of each Tile

• Tile
• Left-Tile
• Right-Tile
• Top-Tile
• Bottom-Tile
• Top-left-Tile
• Top-Right-Tile
• Bottom-left-Tile
• Bottom-Right-Tile

Methods

class spydrnet_physical.util.Tile01(grid, netlist, library, top_module)

Methods:

create_tiles	Creates tiles
merge_and_update	Merges given list of instances and updates width and height parameter
_get_width_height
_update_placement
_main_tile	Create main Tiles
_left_tile	Create Left Tiles
_right_tile	Create Right Tiles
_top_tile	Create Top Tiles
_bottom_tile	Create Bottom Tiles
_top_left_tile	Create top left tile
_top_right_tile	Create top right tile
_bottom_left_tile	Create bottom left tile
_bottom_right_tile	Create bottom right tile

create_tiles()

Creates tiles

merge_and_update(instance_list, tile_name)

Merges given list of instances and updates width and height parameter

_main_tile()

Create main Tiles

                  +-----+
                  |     |
    +-------+ +----     ---+
    |  CBY  | |     SB     |
    +-------+ +----     ---+
+---------------+ |     |
|               | +-----+
|               | +-----+
|               | |     |
|      CLB      | | CBX |
|               | +-----+
|               |
+---------------+

_left_tile()

Create Left Tiles

+-----+                  +-----+
|     |                  |     |
|     +--+ +-------+ +---+     +--+
| SB     | |  CBY  | |     SB     |
|     +--+ +-------+ +---+     +--+
|     | +--------------+ |     |
+-----+ |              | +-----+
+-----+ |              | +-----+
|     | |              | |     |
| CBX | |     CLB      | | CBX |
+-----+ |              | +-----+
        |              |
        +--------------+

_right_tile()

Create Right Tiles

                 +-----+
                 |     |
    +-------+ +--+     |
    |  CBY  | |    SB  |
    +-------+ +--+     |
+--------------+ |     |
|              | +-----+
|              | +-----+
|              | |     |
|     CLB      | | CBX |
|              | +-----+
|              |
+--------------+

_top_tile()

Create Top Tiles

   +-------+ +------------+
   |  CBY  | |     SB     |
   +-------+ +---+     +--+
+--------------+ |     |
|              | +-----+
|              | +-----+
|              | |     |
|     CLB      | | CBX |
|              | +-----+
|              |
+--------------+

_bottom_tile()

Create Bottom Tiles

                 +-----+
                 |     |
   +-------+ +---+     +--+
   |  CBY  | |     SB     |
   +-------+ +---+     +--+
+--------------+ |     |
|              | +-----+
|              | +-----+
|              | |     |
|     CLB      | | CBX |
|              | +-----+
|              | +-----+
+--------------+ |     |
   +-------+ +---+     +--+
   |  CBY  | |     SB     |
   +-------+ +------------+

_top_left_tile()

Create top left tile

+--------+ +-------+ +------------+
|  SB    | |  CBX  | |     SB     |
|     +--+ +-------+ +---+     +--+
|     | +--------------+ |     |
+-----+ |              | +-----+
+-----+ |              | +-----+
|     | |              | |     |
| CBY | |     CLB      | | CBY |
+-----+ |              | +-----+
        |              |
        +--------------+

_top_right_tile()

Create top right tile

+------------+ +-------+ +---------+
|     SB     | |  CBY  | |     SB  |
+---+     +--+ +-------+ +---+     |
    |     | +--------------+ |     |
    +-----+ |              | +-----+
    +-----+ |              | +-----+
    |     | |              | |     |
    | CBX | |     CLB      | | CBX |
    +-----+ |              | +-----+
            |              |
            +--------------+

_bottom_left_tile()

Create bottom left tile

+-----+                  +-----+
|     |                  |     |
|     +--+ +-------+ +---+     +--+
| SB     | |  CBY  | |     SB  |  |
|     +--+ +-------+ +---+     +--+
|     | +--------------+ |     |
+-----+ |              | +-----+
+-----+ |              | +-----+
|     | |              | |     |
| CBX | |     CLB      | | CBX |
+-----+ |              | +-----+
+-----+ |              | +-----+
|     | +--------------+ |     |
|     +--+ +-------+ +---+     +--+
| SB     | |  CBY  | |     SB     |
+--------+ +-------+ +------------+

_bottom_right_tile()

Create bottom right tile

                 +-----+
                 |     |
   +-------+ +---+     |
   |  CBY  | |     SB  |
   +-------+ +---+     |
+--------------+ |     |
|              | +-----+
|              | +-----+
|              | |     |
|     CLB      | | CBX |
|              | +-----+
|              | +-----+
+--------------+ |     |
   +-------+ +---+     |
   |  CBY  | |     SB  |
   +-------+ +---------+