b9799b4c4a
The nmigen-yosys PyPI package provides a custom, minimal build of Yosys that uses (at the moment) wasmtime-py to deliver a single WASM binary that can run on many platforms, and eliminates the need to build Yosys from source. Not only does this lower barrier to entry for new nMigen developers, but also decouples nMigen from Yosys' yearly release cycle, which lets us use new features and drop workarounds for Yosys bugs earlier. The source for the nmigen-yosys package is provided at: https://github.com/nmigen/nmigen-yosys The package is built from upstream source and released automatically with no manual steps. Fixes #371.
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
import os
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import re
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import subprocess
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import itertools
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from .._yosys import *
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from . import rtlil
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__all__ = ["YosysError", "convert", "convert_fragment"]
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def _convert_rtlil_text(rtlil_text, *, strip_internal_attrs=False, write_verilog_opts=()):
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# this version requirement needs to be synchronized with the one in setup.py!
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yosys = find_yosys(lambda ver: ver >= (0, 9))
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yosys_version = yosys.version()
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attr_map = []
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if strip_internal_attrs:
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attr_map.append("-remove generator")
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attr_map.append("-remove top")
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attr_map.append("-remove src")
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attr_map.append("-remove nmigen.hierarchy")
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attr_map.append("-remove nmigen.decoding")
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return yosys.run(["-q", "-"], """
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# Convert nMigen's RTLIL to readable Verilog.
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read_ilang <<rtlil
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{}
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rtlil
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{prune}delete w:$verilog_initial_trigger
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{prune}proc_prune
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proc_init
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proc_arst
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proc_dff
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proc_clean
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memory_collect
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attrmap {attr_map}
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attrmap -modattr {attr_map}
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write_verilog -norename {write_verilog_opts}
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""".format(rtlil_text,
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# Yosys 0.9 release has buggy proc_prune.
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prune="# " if yosys_version < (0, 9, 231) else "",
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attr_map=" ".join(attr_map),
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write_verilog_opts=" ".join(write_verilog_opts),
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))
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def convert_fragment(*args, strip_internal_attrs=False, **kwargs):
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rtlil_text, name_map = rtlil.convert_fragment(*args, **kwargs)
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return _convert_rtlil_text(rtlil_text, strip_internal_attrs=strip_internal_attrs), name_map
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def convert(*args, strip_internal_attrs=False, **kwargs):
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rtlil_text = rtlil.convert(*args, **kwargs)
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return _convert_rtlil_text(rtlil_text, strip_internal_attrs=strip_internal_attrs)
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