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# -*- coding: utf-8 -*-
#
# AWL simulator - instructions
#
# Copyright 2012-2013 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 awlsim.instructions.main import *
class AwlInsn_BTI(AwlInsn):
def __init__(self, cpu, rawInsn):
AwlInsn.__init__(self, cpu, AwlInsn.TYPE_BTI, rawInsn)
self.assertOpCount(0)
def run(self):
accu1 = self.cpu.accu1.get()
bcd = accu1 & 0xFFF
a, b, c = (bcd & 0xF), ((bcd >> 4) & 0xF), ((bcd >> 8) & 0xF)
if bcd > 0x999 or a > 9 or b > 9 or c > 9:
raise AwlSimError("Invalid BCD value")
binval = (a + (b * 10) + (c * 100)) & 0xFFFF
if accu1 & 0x8000:
binval = (-binval) & 0xFFFF
self.cpu.accu1.setWord(binval)
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