| """ Library for parsing route output from VPR route files. """ |
| from collections import namedtuple |
| |
| Node = namedtuple('Node', 'inode x_low y_low x_high y_high ptc') |
| |
| |
| def format_name(s): |
| """ Converts VPR parenthesized name to just name. """ |
| assert s[0] == '(' |
| assert s[-1] == ')' |
| return s[1:-1] |
| |
| |
| def format_coordinates(coord): |
| """ Parses coordinates from VPR route file in format of (x,y). """ |
| coord = format_name(coord) |
| x, y = coord.split(',') |
| return int(x), int(y) |
| |
| |
| def find_net_sources(f): |
| """ Yields tuple of (net string, Node namedtuple) from file object. |
| |
| File object should be formatted as VPR route output file. |
| |
| """ |
| net = None |
| for e in f: |
| tokens = e.strip().split() |
| if not tokens: |
| continue |
| elif tokens[0][0] == '#': |
| continue |
| elif tokens[0] == 'Net': |
| net = format_name(tokens[2]) |
| elif e == "\n\nUsed in local cluster only, reserved one CLB pin\n\n": |
| continue |
| else: |
| if net is not None: |
| inode = int(tokens[1]) |
| assert tokens[2] == 'SOURCE' |
| |
| x, y = format_coordinates(tokens[3]) |
| |
| if tokens[4] == 'to': |
| x2, y2 = format_coordinates(tokens[5]) |
| offset = 2 |
| else: |
| x2, y2 = x, y |
| offset = 0 |
| |
| ptc = int(tokens[5 + offset]) |
| |
| yield net, Node(inode, x, y, x2, y2, ptc) |
| net = None |
