mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-27 10:55:51 +00:00
Code Activity

Docs: adding other macro command lists

Browse source 
Also updates `macro_commands.py` to skip empty lines, and moves comment
stripping earlier in parsing.
This commit is contained in:
Krystine Sherwin 2024-01-24 10:29:40 +13:00
parent 6c8949cacc
commit 449135a9d4
No known key found for this signature in database
8 changed files with 111 additions and 102 deletions
Download patch file Download diff file Expand all files Collapse all files

21
docs/source/using_yosys/synthesis/proc.rst
View file

@ -1,26 +1,21 @@
Converting process blocks
~~~~~~~~~~~~~~~~~~~~~~~~~
.. role:: yoscrypt(code)
:language: yoscrypt
The Verilog frontend converts ``always``-blocks to RTL netlists for the
expressions and "processess" for the control- and memory elements. The
:cmd:ref:`proc` command then transforms these "processess" to netlists of RTL
multiplexer and register cells. It also is a macro command that calls the other
``proc_*`` commands in a sensible order:
#. :cmd:ref:`proc_clean` removes empty branches and processes.
#. :cmd:ref:`proc_rmdead` removes unreachable branches.
#. :cmd:ref:`proc_prune`
#. :cmd:ref:`proc_init` special handling of "initial" blocks.
#. :cmd:ref:`proc_arst` identifies modeling of async resets.
#. :cmd:ref:`proc_rom`
#. :cmd:ref:`proc_mux` converts decision trees to multiplexer networks.
#. :cmd:ref:`proc_dlatch`
#. :cmd:ref:`proc_dff` extracts registers from processes.
#. :cmd:ref:`proc_memwr`
#. :cmd:ref:`proc_clean` this should remove all the processes, provided all went
fine.
.. literalinclude:: /code_examples/macro_commands/proc.ys
:language: yoscrypt
:start-after: #end:
:caption: Passes called by :cmd:ref:`proc`
After all the ``proc_*`` commands, :yoscrypt:`opt_expr` is called. This can be
After all the ``proc_*`` commands, :cmd:ref:`opt_expr` is called. This can be
disabled by calling :yoscrypt:`proc -noopt`. For more information about
:cmd:ref:`proc`, such as disabling certain sub commands, see :doc:`/cmd/proc`.