amaranth/nmigen/back/verilog.py

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2018-12-11 13:50:56 -07:00
import os
import subprocess
from . import rtlil
__all__ = ["convert"]
class YosysError(Exception):
pass
def convert(*args, **kwargs):
il_text = rtlil.convert(*args, **kwargs)
popen = subprocess.Popen([os.getenv("YOSYS", "yosys"), "-q", "-"],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
encoding="utf-8")
verilog_text, error = popen.communicate("""
read_ilang <<rtlil
{}
rtlil
proc_init
proc_arst
proc_dff
proc_clean
write_verilog
""".format(il_text))
if popen.returncode:
raise YosysError(error.strip())
else:
return verilog_text