back.cxxrtl: new backend.

nmigen/back/cxxrtl.py

@@ -0,0 +1,27 @@
+from .._yosys import *
+from . import rtlil
+
+
+__all__ = ["YosysError", "convert", "convert_fragment"]
+
+
+def _convert_rtlil_text(rtlil_text, *, src_loc_at=0):
+     # FIXME: update this requirement once Yosys updates its node version
+    yosys = find_yosys(lambda ver: ver >= (0, 9))
+    return yosys.run(["-q", "-"], """
+read_ilang <<rtlil
+{}
+rtlil
+delete w:$verilog_initial_trigger
+write_cxxrtl
+""".format(rtlil_text), src_loc_at=1 + src_loc_at)
+
+
+def convert_fragment(*args, **kwargs):
+    rtlil_text, name_map = rtlil.convert_fragment(*args, **kwargs)
+    return _convert_rtlil_text(rtlil_text, src_loc_at=1), name_map
+
+
+def convert(*args, **kwargs):
+    rtlil_text = rtlil.convert(*args, **kwargs)
+    return _convert_rtlil_text(rtlil_text, src_loc_at=1)