mirror of
https://github.com/The-OpenROAD-Project/OpenLane.git
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46d8e5a042
~ Avoid using `/dev/null` for writing DEF files (it tries to create a temp file and fail) ~ PDK now has a default value of sky130A even outside the Makefile ~ PDK_ROOT now set automatically if Volare is installed ~ Upgrade to a newer version of OpenLane 2, which in turns uses `nix-eda` ~ Format nix packages using Alejandra ~ OpenROAD scripts now read liberty files before database files (they are linked together when the database is read) ~ Update Readme to remove Colab and add banner directing people to OpenLane 2
99 lines
2.9 KiB
Python
99 lines
2.9 KiB
Python
# Copyright ©2022 Efabless Corporation
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#
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# This file is part of the DFFRAM Memory Compiler.
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# See https://github.com/Cloud-V/DFFRAM for further info.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import click
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from decimal import Decimal
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from reader import click_odb, OdbReader
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def to_si(microns: Decimal) -> str:
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units = ["μm", "mm", "m"]
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unit = 0
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value = microns
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while value >= 1000 and unit < len(units):
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value /= 1000
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unit += 1
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return f"{value}{units[unit]}"
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@click.command()
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@click.option(
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"-h",
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"--human-readable",
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default=False,
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is_flag=True,
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help="Print with SI units instead of database units.",
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)
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@click.option(
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"-t",
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"--threshold",
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default=Decimal("Infinity"),
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type=Decimal,
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help="Threshold above which to print the wire (Default: ∞)",
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)
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@click.option(
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"-F",
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"--fail",
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default=False,
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is_flag=True,
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help="Exit with a non-zero code if any wire surpasses the threshold.",
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)
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@click.option(
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"-R",
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"--report-out",
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default=None,
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help="Output to print CSV file to. (Default: input + .wire_lengths.csv)",
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)
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@click_odb
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def main(report_out, threshold, fail, human_readable, input_db, reader: OdbReader):
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db = reader.db
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if report_out is None:
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report_out = f"{input_db}.wire_length.csv"
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block = db.getChip().getBlock()
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dbunits = block.getDefUnits()
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nets = list(filter(lambda net: net.getWire() is not None, block.getNets()))
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nets.sort(key=lambda net: net.getWire().getLength(), reverse=True)
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above_threshold = []
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with open(report_out, "w") as f:
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print("net,length_um", file=f)
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for net in nets:
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length = net.getWire().getLength()
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length_microns = Decimal(length) / Decimal(dbunits)
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if length_microns >= threshold:
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above_threshold.append((net, length_microns))
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length_printable: str = str(length_microns)
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if human_readable:
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length_printable = str(to_si(length_microns))
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print(f"{net.getName()},{length_printable}", file=f)
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for net, length_microns in above_threshold:
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print(
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f"Net {net.getName()} is above the length threshold ({length_microns}/{threshold} μm)."
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)
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if len(above_threshold) == 0:
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print(f"No wire length surpasses the threshold ({threshold} μm).")
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elif fail:
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exit(os.EX_DATAERR)
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if __name__ == "__main__":
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main()
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