Crate libreda_pnr

ASIC place-and-route framework.

This crate contains interface definitions for place-and-route related algorithms.

The core idea of the framework is to enable independent development of place & route engines which then can easily be plugged together.

Overview

Incomplete overview:

• place - interfaces for placement engines and representations of placement problems
• rebuffer - interface for buffer insertion engines
• route - interfaces for routing engines
• timing_analysis - interfaces for static timing-analysis (STA) engines
• util - useful functions which don’t yet have their own category

Implementations

Implementations of place and route algorithms are not included in this crate. Some can be found in the following list:

Placement and legalizaton

• electron-placer (written in Rust)
• Coloquinte (C bindings, statically linked)

Routing

• TritonRoute (subprocess called by passing LEF/DEF files)
• mycelium (written in Rust)

Re-exports

pub use libreda_db;

Modules

db

The prelude helps to import most commonly used modules.

design

A Design structure collects information necessary for the place and route steps. This includes the netlist and layout, properties of cell instances, etc. Between Design structures and place & route engines lies an abstraction layer made by traits such as PlacementProblem.

legalize

Interface definitions for legalization engines (also known as detail placement).

metrics

Metrics and statistics for evaluating placement & routing quality.

place

Interface definitions for placement related algorithms.

prelude

Shortcut to most things defined in this crate.

rebuffer

Trait definitions for re-buffering of high-fanout nets. This includes clock-tree and buffer-tree generators.

route

Interface definitions for routing related algorithms.

test_data 🔒

Generate test data.

timing_analysis

Interfaces for timing analysis engines.

util

Collection of utility functions.