# -*- coding: utf-8 -*-
#
# AWL simulator - instructions
#
# Copyright 2012-2018 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

from __future__ import division, absolute_import, print_function, unicode_literals
#from awlsim.common.cython_support cimport * #@cy
from awlsim.common.compat import *

from awlsim.common.exceptions import *

from awlsim.core.instructions.main import * #+cimport
from awlsim.core.operatortypes import * #+cimport
from awlsim.core.operators import * #+cimport


class AwlInsn_UN(AwlInsn): #+cdef

	__slots__ = ()

	def __init__(self, cpu, rawInsn=None, **kwargs):
		AwlInsn.__init__(self, cpu, AwlInsn.TYPE_UN, rawInsn, **kwargs)
		self.assertOpCount(1)

	def run(self): #+cdef
#@cy		cdef S7StatusWord s
#@cy		cdef _Bool NER
#@cy		cdef _Bool STA
#@cy		cdef _Bool newOR

		s = self.cpu.statusWord
		STA = AwlMemoryObject_asScalar1(self.cpu.fetch(self.op0,
							       self._widths_1))
		NER = s.NER
		newOR = s.OR & NER
		s.VKE = ((s.VKE | (NER ^ 1)) & (STA ^ 1)) | newOR
		s.OR, s.STA, s.NER = newOR, STA, 1
