pycode, rused = convert_to_python(pcode, d.form)
# create list of arguments to call
regs = list(rused['read_regs']) + list(rused['uninit_regs'])
+ regs += list(rused['special_regs'])
args = ', '.join(create_args(regs, 'self'))
# create list of arguments to return
retargs = ', '.join(create_args(rused['write_regs']))