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Clean up min area

This commit is contained in:
mrg 2021-01-13 12:32:17 -08:00
parent 01d312d65c
commit 4991693f1a
1 changed files with 29 additions and 12 deletions
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41
compiler/base/hierarchy_layout.py
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@ -1237,22 +1237,31 @@ class layout():
self.add_power_pin(new_name, pin.center(), start_layer=start_layer) self.add_power_pin(new_name, pin.center(), start_layer=start_layer)
def add_power_pin(self, name, loc, directions=None, start_layer="m1"): def add_power_pin(self, name, loc, directions=None, start_layer="m1"):
# Hack for min area
if OPTS.tech_name == "sky130" and self.is_top_level:
min_area = drc["minarea_{}".format(self.pwr_grid_layer)]
width = round_to_grid(sqrt(min_area))
height = round_to_grid(min_area / width)
else:
width = None
height = None
if start_layer == self.pwr_grid_layer: if start_layer == self.pwr_grid_layer:
self.add_layout_pin_rect_center(text=name, self.add_layout_pin_rect_center(text=name,
layer=self.pwr_grid_layer, layer=self.pwr_grid_layer,
offset=loc) offset=loc,
width=width,
height=height)
else: else:
via = self.add_via_stack_center(from_layer=start_layer, via = self.add_via_stack_center(from_layer=start_layer,
to_layer=self.pwr_grid_layer, to_layer=self.pwr_grid_layer,
offset=loc, offset=loc,
directions=directions) directions=directions)
# Hack for min area if not width:
if OPTS.tech_name == "sky130" and self.is_top_level:
width = round_to_grid(sqrt(drc["minarea_m3"]))
height = round_to_grid(drc["minarea_m3"] / width)
else:
width = via.width width = via.width
if not height:
height = via.height height = via.height
self.add_layout_pin_rect_center(text=name, self.add_layout_pin_rect_center(text=name,
layer=self.pwr_grid_layer, layer=self.pwr_grid_layer,
@ -1270,22 +1279,30 @@ class layout():
if not loc: if not loc:
loc = pin.center() loc = pin.center()
# Hack for min area
if OPTS.tech_name == "sky130" and self.is_top_level:
min_area = drc["minarea_{}".format(self.pwr_grid_layer)]
width = round_to_grid(sqrt(min_area))
height = round_to_grid(min_area / width)
else:
width = None
height = None
if pin.layer == self.pwr_grid_layer: if pin.layer == self.pwr_grid_layer:
self.add_layout_pin_rect_center(text=pin.name, self.add_layout_pin_rect_center(text=pin.name,
layer=self.pwr_grid_layer, layer=self.pwr_grid_layer,
offset=loc) offset=loc,
width=width,
height=height)
else: else:
via = self.add_via_stack_center(from_layer=pin.layer, via = self.add_via_stack_center(from_layer=pin.layer,
to_layer=self.pwr_grid_layer, to_layer=self.pwr_grid_layer,
offset=loc, offset=loc,
directions=directions) directions=directions)
# Hack for min area if not width:
if OPTS.tech_name == "sky130" and self.is_top_level:
width = round_to_grid(sqrt(drc["minarea_m3"]))
height = round_to_grid(drc["minarea_m3"] / width)
else:
width = via.width width = via.width
if not height:
height = via.height height = via.height
self.add_layout_pin_rect_center(text=pin.name, self.add_layout_pin_rect_center(text=pin.name,
layer=self.pwr_grid_layer, layer=self.pwr_grid_layer,