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scripts/liberty: More aggressive ccsnoise filtering. 

Fixes #77.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
This commit is contained in:
Tim 'mithro' Ansell 2020-07-12 22:22:38 -07:00
parent 73d129ef85
commit b626ca017d
1 changed files with 22 additions and 9 deletions
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31
scripts/python-skywater-pdk/skywater_pdk/liberty.py
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@ -257,7 +257,7 @@ def collect(library_dir) -> Tuple[Dict[str, TimingType], List[str]]:
return libname0, corners, all_cells
def remove_ccsnoise(data):
def remove_ccsnoise(data, cellname):
for k, v in list(data.items()):
if "ccsn_" in k:
del data[k]
@ -271,19 +271,32 @@ def remove_ccsnoise(data):
if "input_voltage" in pin_data:
del pin_data["input_voltage"]
ccsn_keys = set()
for pk in pin_data:
if not pk.startswith("ccsn_"):
continue
ccsn_keys.add(pk)
for pk in ccsn_keys:
if debug:
print("{:20s} - {:15s}: Removing {}".format(cellname, k, pk))
del pin_data[pk]
if "timing" not in pin_data:
continue
pin_timing = pin_data["timing"]
for t in pin_timing:
for i,t in enumerate(pin_timing):
ccsn_keys = set()
for k in t:
if not k.startswith("ccsn_"):
for tk in t:
if not tk.startswith("ccsn_"):
continue
ccsn_keys.add(k)
ccsn_keys.add(tk)
for k in ccsn_keys:
del t[k]
for tk in ccsn_keys:
if debug:
print("{:20s} - {:15s}.timing[{:3d}]: Removing {}".format(cellname, k, i, tk))
del t[tk]
def generate(library_dir, lib, corner, ocorner_type, icorner_type, cells):
@ -320,7 +333,7 @@ def generate(library_dir, lib, corner, ocorner_type, icorner_type, cells):
# Remove the ccsnoise if it exists
if ocorner_type != TimingType.ccsnoise:
remove_ccsnoise(common_data)
remove_ccsnoise(common_data, "library")
output = liberty_dict("library", lib+"__"+corner, common_data)
assert output[-1] == '}', output
@ -336,7 +349,7 @@ def generate(library_dir, lib, corner, ocorner_type, icorner_type, cells):
# Remove the ccsnoise if it exists
if ocorner_type != TimingType.ccsnoise:
remove_ccsnoise(cell_data)
remove_ccsnoise(cell_data, cell_with_size)
top_write([''])
top_write(liberty_dict("cell", "%s__%s" % (lib, cell_with_size), cell_data, [cell_with_size]))