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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_AbstractCall(AwlInsn):
def staticSanityChecks(self):
if len(self.ops) == 1:
# FC/SFC call
blockOper = self.ops[0]
if blockOper.type == AwlOperator.BLKREF_FC:
try:
fc = self.cpu.fcs[blockOper.value.byteOffset]
except KeyError as e:
raise AwlSimError("Called FC not found",
rawInsn = self.rawInsn)
elif blockOper.type == AwlOperator.BLKREF_SFC:
try:
fc = self.cpu.sfcs[blockOper.value.byteOffset]
except KeyError as e:
raise AwlSimError("SFC %d not implemented, yet" %\
blockOper.value.byteOffset,
rawInsn = self.rawInsn)
elif blockOper.type == AwlOperator.BLKREF_FB or\
blockOper.type == AwlOperator.BLKREF_SFB:
raise AwlSimError("Missing DB in function "
"block call",
rawInsn = self.rawInsn)
else:
raise AwlSimError("Invalid CALL operand",
rawInsn = self.rawInsn)
if fc.interface.interfaceFieldCount != len(self.params):
raise AwlSimError("Call interface mismatch. "
"Passed %d parameters, but expected %d.\n"
"==== The block interface is:\n%s\n====" %\
(len(self.params), fc.interface.interfaceFieldCount,
str(fc.interface)),
rawInsn = self.rawInsn)
elif len(self.ops) == 2:
# FB/SFB call
blockOper = self.ops[0]
dbOper = self.ops[1]
if dbOper.type != AwlOperator.BLKREF_DB:
raise AwlSimError("Second CALL operand is "
"not a DB operand.",
rawInsn = self.rawInsn)
try:
db = self.cpu.dbs[dbOper.value.byteOffset]
except KeyError as e:
raise AwlSimError("DB used in FB call not found",
rawInsn = self.rawInsn)
if not db.isInstanceDB():
raise AwlSimError("DB %d is not an instance DB" %\
dbOper.value.byteOffset,
rawInsn = self.rawInsn)
if blockOper.type == AwlOperator.BLKREF_FB:
try:
fb = self.cpu.fbs[blockOper.value.byteOffset]
except KeyError as e:
raise AwlSimError("Called FB not found",
rawInsn = self.rawInsn)
# TODO check if this is an FB-DB
pass#TODO
elif blockOper.type == AwlOperator.BLKREF_SFB:
try:
fb = self.cpu.sfbs[blockOper.value.byteOffset]
except KeyError as e:
raise AwlSimError("SFB %d not implemented, yet" %\
blockOper.value.byteOffset,
rawInsn = self.rawInsn)
# TODO check if this is an SFB-DB
pass#TODO
elif blockOper.type == AwlOperator.BLKREF_FC or\
blockOper.type == AwlOperator.BLKREF_SFC:
raise AwlSimError("Calling function, but "
"a DB was specified.",
rawInsn = self.rawInsn)
else:
raise AwlSimError("Invalid CALL operand",
rawInsn = self.rawInsn)
if db.codeBlock.index != fb.index:
raise AwlSimError("DB %d is not an instance DB for FB %d" %\
(dbOper.value.byteOffset,
blockOper.value.byteOffset),
rawInsn = self.rawInsn)
else:
assert(0)
class AwlInsn_CALL(AwlInsn_AbstractCall):
def __init__(self, cpu, rawInsn):
AwlInsn_AbstractCall.__init__(self, cpu, AwlInsn.TYPE_CALL, rawInsn)
self.assertOpCount((1,2))
if len(self.ops) == 1:
self.run = self.__run_CALL_FC
else:
self.run = self.__run_CALL_FB
def __run_CALL_FC(self):
self.cpu.run_CALL(self.ops[0], None, self.params)
s = self.cpu.statusWord
s.OS, s.OR, s.STA, s.NER = 0, 0, 1, 0
def __run_CALL_FB(self):
self.cpu.run_CALL(self.ops[0], self.ops[1], self.params)
s = self.cpu.statusWord
s.OS, s.OR, s.STA, s.NER = 0, 0, 1, 0
class AwlInsn_CC(AwlInsn_AbstractCall):
def __init__(self, cpu, rawInsn):
AwlInsn_AbstractCall.__init__(self, cpu, AwlInsn.TYPE_CC, rawInsn)
self.assertOpCount(1)
def run(self):
s = self.cpu.statusWord
if s.VKE:
self.cpu.run_CALL(self.ops[0])
s.OS, s.OR, s.STA, s.VKE, s.NER = 0, 0, 1, 1, 0
class AwlInsn_UC(AwlInsn_AbstractCall):
def __init__(self, cpu, rawInsn):
AwlInsn_AbstractCall.__init__(self, cpu, AwlInsn.TYPE_UC, rawInsn)
self.assertOpCount(1)
def run(self):
self.cpu.run_CALL(self.ops[0])
s = self.cpu.statusWord
s.OS, s.OR, s.STA, s.NER = 0, 0, 1, 0
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