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# -*- coding: utf-8 -*-
#
# AWL simulator - operators
# Copyright 2012-2013 Michael Buesch <m@bues.ch>
#
# Licensed under the terms of the GNU General Public License version 2.
#
from awlstatusword import *
from util import *
class AwlOperator(object):
enum.start # Operator types
IMM = enum.item # Immediate value (constant)
IMM_REAL = enum.item # Real
IMM_S5T = enum.item # S5T immediate
IMM_TIME = enum.item # T# immediate
IMM_DATE = enum.item # D# immediate
IMM_TOD = enum.item # TOD# immediate
MEM_E = enum.item # Input
MEM_A = enum.item # Output
MEM_M = enum.item # Flags
MEM_L = enum.item # Localstack
MEM_DB = enum.item # Global datablock
MEM_DI = enum.item # Instance datablock
MEM_T = enum.item # Timer
MEM_Z = enum.item # Counter
MEM_PA = enum.item # Peripheral output
MEM_PE = enum.item # Peripheral input
MEM_STW = enum.item # Status word bit read
MEM_STW_Z = enum.item # Status word "==0" read
MEM_STW_NZ = enum.item # Status word "<>0" read
MEM_STW_POS = enum.item # Status word ">0" read
MEM_STW_NEG = enum.item # Status word "<0" read
MEM_STW_POSZ = enum.item # Status word ">=0" read
MEM_STW_NEGZ = enum.item # Status word "<=0" read
MEM_STW_UO = enum.item # Status word "UO" read
LBL_REF = enum.item # Label reference
BLKREF_FC = enum.item # FC reference
BLKREF_SFC = enum.item # SFC reference
BLKREF_FB = enum.item # FB reference
BLKREF_SFB = enum.item # SFB reference
BLKREF_DB = enum.item # DB reference
BLKREF_DI = enum.item # DI reference
NAMED_LOCAL = enum.item # Named local reference (#abc)
INTERF_DB = enum.item # Interface-DB access (translated NAMED_LOCAL)
# Virtual operators used for debugging of the simulator
VIRT_ACCU = enum.item # Accu
VIRT_AR = enum.item # AR
enum.end # Operator types
# TODO: Use AwlOffset
def __init__(self, type, width, offset, bitOffset=0):
self.type = type
self.width = width
self.offset = offset
self.bitOffset = bitOffset
self.labelIndex = None
self.insn = None
self.setExtended(False)
def setInsn(self, newInsn):
self.insn = newInsn
def setExtended(self, isExtended):
self.isExtended = isExtended
def setType(self, newType):
self.type = newType
def setOffset(self, newByteOffset, newBitOffset):
self.offset = newByteOffset
self.bitOffset = newBitOffset
def setWidth(self, newWidth):
self.width = newWidth
@property
def immediate(self):
return self.offset
@property
def label(self):
return self.offset
def setLabelIndex(self, newLabelIndex):
self.labelIndex = newLabelIndex
def assertType(self, types, lowerLimit=None, upperLimit=None):
if not isinstance(types, list) and\
not isinstance(types, tuple):
types = [ types, ]
if not self.type in types:
raise AwlSimError("Operator is type is invalid")
if lowerLimit is not None:
if self.offset < lowerLimit:
raise AwlSimError("Operator value too small")
if upperLimit is not None:
if self.offset > upperLimit:
raise AwlSimError("Operator value too big")
type2str = {
MEM_STW_Z : "==0",
MEM_STW_NZ : "<>0",
MEM_STW_POS : ">0",
MEM_STW_NEG : "<0",
MEM_STW_POSZ : ">=0",
MEM_STW_NEGZ : "<=0",
MEM_STW_UO : "UO",
}
type2prefix = {
MEM_E : "E",
MEM_A : "A",
MEM_M : "M",
MEM_L : "L",
MEM_T : "T",
MEM_Z : "Z",
}
def __repr__(self):
try:
return self.type2str[self.type]
except KeyError as e:
pass
if self.type == self.IMM:
if self.width == 16:
return str(self.immediate)
elif self.width == 32:
return "L#" + str(self.immediate)
if self.type == self.IMM_REAL:
return str(dwordToPyFloat(self.immediate))
elif self.type == self.IMM_S5T:
return "S5T#" #TODO
elif self.type == self.IMM_TIME:
return "T#" #TODO
elif self.type == self.IMM_DATE:
return "D#" #TODO
elif self.type == self.IMM_TOD:
return "TOD#" #TODO
elif self.type in (self.MEM_A, self.MEM_E,
self.MEM_M, self.MEM_L):
pfx = self.type2prefix[self.type]
if self.width == 1:
return "%s %d.%d" %\
(pfx, self.offset, self.bitOffset)
elif self.width == 8:
return "%sB %d" % (pfx, self.offset)
elif self.width == 16:
return "%sW %d" % (pfx, self.offset)
elif self.width == 32:
return "%sD %d" % (pfx, self.offset)
elif self.type == self.MEM_DB:
if self.width == 1:
return "DBX %d.%d" % (self.offset, self.bitOffset)
elif self.width == 8:
return "DBB %d" % self.offset
elif self.width == 16:
return "DBW %d" % self.offset
elif self.width == 32:
return "DBD %d" % self.offset
elif self.type == self.MEM_DI:
if self.width == 1:
return "DIX %d.%d" % (self.offset, self.bitOffset)
elif self.width == 8:
return "DIB %d" % self.offset
elif self.width == 16:
return "DIW %d" % self.offset
elif self.width == 32:
return "DID %d" % self.offset
elif self.type == self.MEM_T:
return "T %d" % self.offset
elif self.type == self.MEM_Z:
return "Z %d" % self.offset
elif self.type == self.MEM_PA:
if self.width == 8:
return "PAB %d" % self.offset
elif self.width == 16:
return "PAW %d" % self.offset
elif self.width == 32:
return "PAD %d" % self.offset
elif self.type == self.MEM_PE:
if self.width == 8:
return "PEB %d" % self.offset
elif self.width == 16:
return "PEW %d" % self.offset
elif self.width == 32:
return "PED %d" % self.offset
elif self.type == self.MEM_STW:
return "__STW " + S7StatusWord.nr2name[self.bitOffset]
elif self.type == self.LBL_REF:
return self.label
elif self.type == self.BLKREF_FC:
return "FC %d" % self.offset
elif self.type == self.BLKREF_SFC:
return "SFC %d" % self.offset
elif self.type == self.BLKREF_FB:
return "FB %d" % self.offset
elif self.type == self.BLKREF_SFB:
return "SFB %d" % self.offset
elif self.type == self.BLKREF_DB:
return "DB %d" % self.offset
elif self.type == self.BLKREF_DI:
return "DI %d" % self.offset
elif self.type == self.NAMED_LOCAL:
return "#%s" % self.offset
elif self.type == self.INTERF_DB:
return "__INTERFACE_DB" #FIXME
elif self.type == self.VIRT_ACCU:
return "__ACCU %d" % self.offset
elif self.type == self.VIRT_AR:
return "__AR %d" % self.offset
assert(0)
@classmethod
def fetchFromByteArray(cls, array, operator):
width, byteOff, bitOff =\
operator.width, operator.offset, operator.bitOffset
try:
if width == 1:
return array[byteOff].getBit(bitOff)
elif width == 8:
assert(bitOff == 0)
return array[byteOff].get()
elif width == 16:
assert(bitOff == 0)
return (array[byteOff].get() << 8) |\
array[byteOff + 1].get()
elif width == 32:
assert(bitOff == 0)
return (array[byteOff].get() << 24) |\
(array[byteOff + 1].get() << 16) |\
(array[byteOff + 2].get() << 8) |\
array[byteOff + 3].get()
except IndexError as e:
raise AwlSimError("fetch: Operator offset out of range")
assert(0)
@classmethod
def storeToByteArray(cls, array, operator, value):
width, byteOff, bitOff =\
operator.width, operator.offset, operator.bitOffset
try:
if width == 1:
array[byteOff].setBitValue(bitOff, value)
elif width == 8:
assert(bitOff == 0)
array[byteOff].set(value)
elif width == 16:
assert(bitOff == 0)
array[byteOff].set(value >> 8)
array[byteOff + 1].set(value)
elif width == 32:
assert(bitOff == 0)
array[byteOff].set(value >> 24)
array[byteOff + 1].set(value >> 16)
array[byteOff + 2].set(value >> 8)
array[byteOff + 3].set(value)
else:
assert(0)
except IndexError as e:
raise AwlSimError("store: Operator offset out of range")
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