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#
# AWL simulator - Operator translator
# Copyright 2012-2013 Michael Buesch <m@bues.ch>
#
# Licensed under the terms of the GNU General Public License version 2.
#
import math
from util import *
from awloperators import *
from awldatatypes import *
from awlparser import *
from awltimers import *
class OpDescriptor(object):
"Instruction operator descriptor"
def __init__(self, operType, width, offset, bitOffset, fieldCount):
self.operType = operType
self.width = width
self.offset = offset
self.bitOffset = bitOffset
self.fieldCount = fieldCount
def dup(self):
return OpDescriptor(self.operType, self.width, self.offset,
self.bitOffset, self.fieldCount)
class AwlOpTranslator(object):
"Instruction operator translator"
__constOperTab = {
"==0" : OpDescriptor(AwlOperator.MEM_STW_Z, 1, 0, 0, 1),
"<>0" : OpDescriptor(AwlOperator.MEM_STW_NZ, 1, 0, 0, 1),
">0" : OpDescriptor(AwlOperator.MEM_STW_POS, 1, 0, 0, 1),
"<0" : OpDescriptor(AwlOperator.MEM_STW_NEG, 1, 0, 0, 1),
">=0" : OpDescriptor(AwlOperator.MEM_STW_POSZ, 1, 0, 0, 1),
"<=0" : OpDescriptor(AwlOperator.MEM_STW_NEGZ, 1, 0, 0, 1),
"OV" : OpDescriptor(AwlOperator.MEM_STW, 1, 0, 5, 1),
"OS" : OpDescriptor(AwlOperator.MEM_STW, 1, 0, 4, 1),
"UO" : OpDescriptor(AwlOperator.MEM_STW_UO, 1, 0, 0, 1),
"BIE" : OpDescriptor(AwlOperator.MEM_STW, 1, 0, 8, 1),
"E" : OpDescriptor(AwlOperator.MEM_E, 1, -1, -1, 2),
"EB" : OpDescriptor(AwlOperator.MEM_E, 8, -1, 0, 2),
"EW" : OpDescriptor(AwlOperator.MEM_E, 16, -1, 0, 2),
"ED" : OpDescriptor(AwlOperator.MEM_E, 32, -1, 0, 2),
"A" : OpDescriptor(AwlOperator.MEM_A, 1, -1, -1, 2),
"AB" : OpDescriptor(AwlOperator.MEM_A, 8, -1, 0, 2),
"AW" : OpDescriptor(AwlOperator.MEM_A, 16, -1, 0, 2),
"AD" : OpDescriptor(AwlOperator.MEM_A, 32, -1, 0, 2),
"L" : OpDescriptor(AwlOperator.MEM_L, 1, -1, -1, 2),
"LB" : OpDescriptor(AwlOperator.MEM_L, 8, -1, 0, 2),
"LW" : OpDescriptor(AwlOperator.MEM_L, 16, -1, 0, 2),
"LD" : OpDescriptor(AwlOperator.MEM_L, 32, -1, 0, 2),
"M" : OpDescriptor(AwlOperator.MEM_M, 1, -1, -1, 2),
"MB" : OpDescriptor(AwlOperator.MEM_M, 8, -1, 0, 2),
"MW" : OpDescriptor(AwlOperator.MEM_M, 16, -1, 0, 2),
"MD" : OpDescriptor(AwlOperator.MEM_M, 32, -1, 0, 2),
"T" : OpDescriptor(AwlOperator.MEM_T, 16, -1, 0, 2),
"Z" : OpDescriptor(AwlOperator.MEM_Z, 16, -1, 0, 2),
"FC" : OpDescriptor(AwlOperator.BLKREF_FC, 16, -1, 0, 2),
"SFC" : OpDescriptor(AwlOperator.BLKREF_SFC, 16, -1, 0, 2),
"FB" : OpDescriptor(AwlOperator.BLKREF_FB, 16, -1, 0, 2),
"SFB" : OpDescriptor(AwlOperator.BLKREF_SFB, 16, -1, 0, 2),
"DB" : OpDescriptor(AwlOperator.BLKREF_DB, 16, -1, 0, 2),
"DI" : OpDescriptor(AwlOperator.BLKREF_DI, 16, -1, 0, 2),
"DBX" : OpDescriptor(AwlOperator.MEM_DB, 1, -1, -1, 2),
"DBB" : OpDescriptor(AwlOperator.MEM_DB, 8, -1, 0, 2),
"DBW" : OpDescriptor(AwlOperator.MEM_DB, 16, -1, 0, 2),
"DBD" : OpDescriptor(AwlOperator.MEM_DB, 32, -1, 0, 2),
"DIX" : OpDescriptor(AwlOperator.MEM_DI, 1, -1, -1, 2),
"DIB" : OpDescriptor(AwlOperator.MEM_DI, 8, -1, 0, 2),
"DIW" : OpDescriptor(AwlOperator.MEM_DI, 16, -1, 0, 2),
"DID" : OpDescriptor(AwlOperator.MEM_DI, 32, -1, 0, 2),
"PEB" : OpDescriptor(AwlOperator.MEM_PE, 8, -1, 0, 2),
"PEW" : OpDescriptor(AwlOperator.MEM_PE, 16, -1, 0, 2),
"PED" : OpDescriptor(AwlOperator.MEM_PE, 32, -1, 0, 2),
"PAB" : OpDescriptor(AwlOperator.MEM_PA, 8, -1, 0, 2),
"PAW" : OpDescriptor(AwlOperator.MEM_PA, 16, -1, 0, 2),
"PAD" : OpDescriptor(AwlOperator.MEM_PA, 32, -1, 0, 2),
"STW" : OpDescriptor(AwlOperator.MEM_STW, 16, 0, 0, 1),
"__STW" : OpDescriptor(AwlOperator.MEM_STW, 1, 0, -1, 2),
"__ACCU" : OpDescriptor(AwlOperator.VIRT_ACCU, 32, -1, 0, 2),
"__AR" : OpDescriptor(AwlOperator.VIRT_AR, 32, -1, 0, 2),
"__CNST_PI" : OpDescriptor(AwlOperator.IMM_REAL, 32,
pyFloatToDWord(math.pi), 0, 1),
"__CNST_E" : OpDescriptor(AwlOperator.IMM_REAL, 32,
pyFloatToDWord(math.e), 0, 1),
"__CNST_PINF" : OpDescriptor(AwlOperator.IMM_REAL, 32,
posInfDWord, 0, 1),
"__CNST_NINF" : OpDescriptor(AwlOperator.IMM_REAL, 32,
negInfDWord, 0, 1),
"__CNST_NAN" : OpDescriptor(AwlOperator.IMM_REAL, 32,
nanDWord, 0, 1),
}
def __init__(self, insn):
self.insn = insn
def __translateAddressOperator(self, opDesc, rawOps):
if len(rawOps) < 1:
raise AwlSimError("Missing address operator")
if opDesc.width == 1:
if opDesc.offset == 0 and opDesc.bitOffset == -1:
try:
opDesc.bitOffset = int(rawOps[0], 10)
except ValueError as e:
if opDesc.operType == AwlOperator.MEM_STW:
opDesc.bitOffset = S7StatusWord.getBitnrByName(rawOps[0])
else:
raise AwlSimError("Invalid bit address")
else:
assert(opDesc.offset == -1 and opDesc.bitOffset == -1)
offset = rawOps[0].split('.')
if len(offset) != 2:
raise AwlSimError("Invalid bit address")
try:
opDesc.offset = int(offset[0], 10)
opDesc.bitOffset = int(offset[1], 10)
except ValueError as e:
raise AwlSimError("Invalid bit address")
elif opDesc.width == 8:
assert(opDesc.offset == -1 and opDesc.bitOffset == 0)
try:
opDesc.offset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid byte address")
elif opDesc.width == 16:
assert(opDesc.offset == -1 and opDesc.bitOffset == 0)
try:
opDesc.offset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid word address")
elif opDesc.width == 32:
assert(opDesc.offset == -1 and opDesc.bitOffset == 0)
try:
opDesc.offset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid doubleword address")
else:
assert(0)
def __doTrans(self, rawInsn, rawOps):
if rawInsn.block.hasLabel(rawOps[0]):
# Label reference
return OpDescriptor(AwlOperator.LBL_REF, 0, rawOps[0], 0, 1)
try:
# Constant operator (from table)
return self.__constOperTab[rawOps[0]].dup()
except KeyError as e:
pass
# Immediate integer
immediate = AwlDataType.tryParseImmediate_INT(rawOps[0])
if immediate is not None:
immediate &= 0xFFFF
return OpDescriptor(AwlOperator.IMM, 16,
immediate, 0, 1)
# Immediate float
immediate = AwlDataType.tryParseImmediate_REAL(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_REAL, 32,
immediate, 0, 1)
# S5Time immediate
immediate = AwlDataType.tryParseImmediate_S5T(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_S5T, 0,
immediate, 0, 1)
# Time immediate
immediate = AwlDataType.tryParseImmediate_TIME(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_TIME, 0,
immediate, 0, 1)
# TOD immediate
immediate = AwlDataType.tryParseImmediate_TOD(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_TOD, 0,
immediate, 0, 1)
# Date immediate
immediate = AwlDataType.tryParseImmediate_Date(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_DATE, 0,
immediate, 0, 1)
# Pointer immediate
#TODO
# Binary immediate
immediate = AwlDataType.tryParseImmediate_Bin(rawOps[0])
if immediate is not None:
size = 32 if (immediate > 0xFFFF) else 16
return OpDescriptor(AwlOperator.IMM, size,
immediate, 0, 1)
# Byte array immediate
immediate, fields = AwlDataType.tryParseImmediate_ByteArray(rawOps)
if immediate is not None:
size = 32 if fields == 9 else 16
return OpDescriptor(AwlOperator.IMM, size, immediate,
0, fields)
# Hex byte immediate
immediate = AwlDataType.tryParseImmediate_HexByte(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 8,
immediate, 0, 1)
# Hex word immediate
immediate = AwlDataType.tryParseImmediate_HexWord(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 16,
immediate, 0, 1)
# Hex dword immediate
immediate = AwlDataType.tryParseImmediate_HexDWord(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 32,
immediate, 0, 1)
# Long integer immediate
immediate = AwlDataType.tryParseImmediate_DINT(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 32,
immediate, 0, 1)
# BCD word immediate
immediate = AwlDataType.tryParseImmediate_BCD_word(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 16,
immediate, 0, 1)
raise AwlSimError("Cannot parse operand: " +\
str(rawOps[0]))
def translateFrom(self, rawInsn):
rawOps = rawInsn.getOperators()
while rawOps:
opDesc = self.__doTrans(rawInsn, rawOps)
if opDesc.fieldCount == 2 and\
(opDesc.offset == -1 or opDesc.bitOffset == -1):
self.__translateAddressOperator(opDesc, rawOps[1:])
if len(rawOps) > opDesc.fieldCount:
if rawOps[opDesc.fieldCount] != ',':
raise AwlSimError("Missing comma in operator list")
opDesc.fieldCount += 1 # Consume comma
if len(rawOps) <= opDesc.fieldCount:
raise AwlSimError("Trailing comma")
operator = AwlOperator(opDesc.operType, opDesc.width,
opDesc.offset, opDesc.bitOffset)
operator.setInsn(self.insn)
operator.setExtended(rawOps[0].startswith("__"))
self.insn.ops.append(operator)
rawOps = rawOps[opDesc.fieldCount : ]
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