bddec3741e
This isn't used yet (the only Yosys warning we can get is useless), but will be handy for CXXRTL.
56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
from .._yosys import *
|
|
from . import rtlil
|
|
|
|
|
|
__all__ = ["YosysError", "convert", "convert_fragment"]
|
|
|
|
|
|
def _convert_rtlil_text(rtlil_text, *, strip_internal_attrs=False, write_verilog_opts=()):
|
|
# this version requirement needs to be synchronized with the one in setup.py!
|
|
yosys = find_yosys(lambda ver: ver >= (0, 9))
|
|
yosys_version = yosys.version()
|
|
|
|
attr_map = []
|
|
if strip_internal_attrs:
|
|
attr_map.append("-remove generator")
|
|
attr_map.append("-remove top")
|
|
attr_map.append("-remove src")
|
|
attr_map.append("-remove nmigen.hierarchy")
|
|
attr_map.append("-remove nmigen.decoding")
|
|
|
|
return yosys.run(["-q", "-"], """
|
|
# Convert nMigen's RTLIL to readable Verilog.
|
|
read_ilang <<rtlil
|
|
{}
|
|
rtlil
|
|
{prune}delete w:$verilog_initial_trigger
|
|
{prune}proc_prune
|
|
proc_init
|
|
proc_arst
|
|
proc_dff
|
|
proc_clean
|
|
memory_collect
|
|
attrmap {attr_map}
|
|
attrmap -modattr {attr_map}
|
|
write_verilog -norename {write_verilog_opts}
|
|
""".format(rtlil_text,
|
|
# Yosys 0.9 release has buggy proc_prune.
|
|
prune="# " if yosys_version < (0, 9, 231) else "",
|
|
attr_map=" ".join(attr_map),
|
|
write_verilog_opts=" ".join(write_verilog_opts),
|
|
),
|
|
# At the moment, Yosys always shows a warning indicating that not all processes can be
|
|
# translated to Verilog. We carefully emit only the processes that *can* be translated, and
|
|
# squash this warning. Once Yosys' write_verilog pass is fixed, we should remove this.
|
|
ignore_warnings=True)
|
|
|
|
|
|
def convert_fragment(*args, strip_internal_attrs=False, **kwargs):
|
|
rtlil_text, name_map = rtlil.convert_fragment(*args, **kwargs)
|
|
return _convert_rtlil_text(rtlil_text, strip_internal_attrs=strip_internal_attrs), name_map
|
|
|
|
|
|
def convert(*args, strip_internal_attrs=False, **kwargs):
|
|
rtlil_text = rtlil.convert(*args, **kwargs)
|
|
return _convert_rtlil_text(rtlil_text, strip_internal_attrs=strip_internal_attrs)
|