moore

Moore is a compiler for hardware description languages that outputs LLHD, with a focus on usability, clear error reporting, and completeness.

Roadmap

1. [x] Parse the entire source code of PULPino
2. [ ] Elaborate and link PULPino
3. [ ] Generate LLHD code for PULPino
4. [ ] Pass PULPino continuous integration testbenches

Compile Flow

Compilation - parse input file(s) - serialize AST to disk

Elaboration - load ASTs from disk - renumber nodes - resolve names - lower to HIR - apply default values - merge ANSI and non-ANSI ports - split ports into port decl and var/net decl - split net decl assignments into net decl and continuous assignment - always_{ff,latch,comb} -> always - flatten nested design elements and sort hierarchy items - assign and check types (can be one step) - evaluate const exprs - specialize generic instances - lower to MIR - evaluate generate constructs - determine scheduling - perform static analyses (future work) - lower to LLHD - link and emit output file

Lowering to HIR

Lowering to HIR resolves syntactic sugar and applies default values. Additionally, the following steps are performed:

• determine port kind, direction, and type of ANSI ports
• pair non-ANSI ports with port and var/net decls in the module body
• merge ANSI and non-ANSI ports into one common port structure