Module gf::mc::pipeline

CPU pipeline model.

We model the pipeline as consisting of three stages: fetch (FetchUnit), decode (DecodeUnit), and execute (ExecuteUnit). For each CPU step (i.e. attempt to execute one instruction bundle) the following happens:

• first, the fetch unit is invoked to fetch the bundle encoding;
• if fetch succeeded, the decode unit is invoked to decode the bundle;
• if decode succeeded, the execute unit is invoked.

Regardless of the individual stage outcomes, the next CPU step is restarted from the fetch stage.

Structs

Pipeline	Model pipeline.
TokenizerDecodeUnit	Tokenizer-based implementation of DecodeUnit.

Enums

DecodeError

Error returned from DecodeUnit.

Traits

DecodeUnit	A model implementation of a CPU decode unit.
ExecuteUnit	A model implementation of a CPU execute unit.
FetchUnit	A model implementation of a CPU fetch unit.