luke
/
OpenRAM
mirror of https://github.com/VLSIDA/OpenRAM.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Continue routing rails in same layer after a blockage

This commit is contained in:
Matt Guthaus 2018-10-24 12:32:27 -07:00
parent a711a5823d
commit 7e2bef624e
1 changed files with 18 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
compiler/router/supply_router.py
View File

@ -331,11 +331,12 @@ class supply_router(router):
# While we can keep expanding east in this horizontal track
while wave and wave[0].x < self.max_xoffset:
added_rail = self.find_supply_rail(name, wave, direction.EAST)
if added_rail:
wave = added_rail.neighbor(direction.EAST)
if not added_rail:
# Just seed with the next one
wave = [x+vector3d(1,0,0) for x in wave]
else:
wave = None
# Seed with the neighbor of the end of the last rail
wave = added_rail.neighbor(direction.EAST)
# Vertical supply rails
max_offset = self.rg.ur.x
@ -345,10 +346,12 @@ class supply_router(router):
# While we can keep expanding north in this vertical track
while wave and wave[0].y < self.max_yoffset:
added_rail = self.find_supply_rail(name, wave, direction.NORTH)
if added_rail:
wave = added_rail.neighbor(direction.NORTH)
if not added_rail:
# Just seed with the next one
wave = [x+vector3d(0,1,0) for x in wave]
else:
wave = None
# Seed with the neighbor of the end of the last rail
wave = added_rail.neighbor(direction.NORTH)
def find_supply_rail(self, name, seed_wave, direct):
"""
@ -356,15 +359,18 @@ class supply_router(router):
to contain a via, and, if so, add it.
"""
start_wave = self.find_supply_rail_start(name, seed_wave, direct)
# This means there were no more unblocked grids in the row/col
if not start_wave:
return None
wave_path = self.probe_supply_rail(name, start_wave, direct)
if self.approve_supply_rail(name, wave_path):
return wave_path
else:
return None
self.approve_supply_rail(name, wave_path)
# Return the rail whether we approved it or not,
# as it will be used to find the next start location
return wave_path
def find_supply_rail_start(self, name, seed_wave, direct):
"""