yosys/docs/source/yosys_internals/flow/index.rst

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Internal flow
=============
A (usually short) synthesis script controls Yosys.
This scripts contain three types of commands:
- **Frontends**, that read input files (usually Verilog);
- **Passes**, that perform transformations on the design in memory;
- **Backends**, that write the design in memory to a file (various formats are
available: Verilog, BLIF, EDIF, SPICE, BTOR, . . .).
.. toctree::
:maxdepth: 2
overview
control_and_data
verilog_frontend