1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
#
# 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 awlparameters import *
from awldatatypes import *
from awlparser import *
from awltimers import *
class OpDescriptor(object):
"Instruction operator descriptor"
def __init__(self, operType, width, offset, fieldCount):
self.operType = operType
self.width = width
self.offset = offset
self.fieldCount = fieldCount
def dup(self):
return OpDescriptor(self.operType, self.width,
AwlOffset(self.offset.byteOffset,
self.offset.bitOffset),
self.fieldCount)
class AwlOpTranslator(object):
"Instruction operator translator"
__constOperTab = {
"==0" : OpDescriptor(AwlOperator.MEM_STW_Z, 1,
AwlOffset(0, 0), 1),
"<>0" : OpDescriptor(AwlOperator.MEM_STW_NZ, 1,
AwlOffset(0, 0), 1),
">0" : OpDescriptor(AwlOperator.MEM_STW_POS, 1,
AwlOffset(0, 0), 1),
"<0" : OpDescriptor(AwlOperator.MEM_STW_NEG, 1,
AwlOffset(0, 0), 1),
">=0" : OpDescriptor(AwlOperator.MEM_STW_POSZ, 1,
AwlOffset(0, 0), 1),
"<=0" : OpDescriptor(AwlOperator.MEM_STW_NEGZ, 1,
AwlOffset(0, 0), 1),
"OV" : OpDescriptor(AwlOperator.MEM_STW, 1,
AwlOffset(0, 5), 1),
"OS" : OpDescriptor(AwlOperator.MEM_STW, 1,
AwlOffset(0, 4), 1),
"UO" : OpDescriptor(AwlOperator.MEM_STW_UO, 1,
AwlOffset(0, 0), 1),
"BIE" : OpDescriptor(AwlOperator.MEM_STW, 1,
AwlOffset(0, 8), 1),
"E" : OpDescriptor(AwlOperator.MEM_E, 1,
AwlOffset(-1, -1), 2),
"EB" : OpDescriptor(AwlOperator.MEM_E, 8,
AwlOffset(-1, 0), 2),
"EW" : OpDescriptor(AwlOperator.MEM_E, 16,
AwlOffset(-1, 0), 2),
"ED" : OpDescriptor(AwlOperator.MEM_E, 32,
AwlOffset(-1, 0), 2),
"A" : OpDescriptor(AwlOperator.MEM_A, 1,
AwlOffset(-1, -1), 2),
"AB" : OpDescriptor(AwlOperator.MEM_A, 8,
AwlOffset(-1, 0), 2),
"AW" : OpDescriptor(AwlOperator.MEM_A, 16,
AwlOffset(-1, 0), 2),
"AD" : OpDescriptor(AwlOperator.MEM_A, 32,
AwlOffset(-1, 0), 2),
"L" : OpDescriptor(AwlOperator.MEM_L, 1,
AwlOffset(-1, -1), 2),
"LB" : OpDescriptor(AwlOperator.MEM_L, 8,
AwlOffset(-1, 0), 2),
"LW" : OpDescriptor(AwlOperator.MEM_L, 16,
AwlOffset(-1, 0), 2),
"LD" : OpDescriptor(AwlOperator.MEM_L, 32,
AwlOffset(-1, 0), 2),
"M" : OpDescriptor(AwlOperator.MEM_M, 1,
AwlOffset(-1, -1), 2),
"MB" : OpDescriptor(AwlOperator.MEM_M, 8,
AwlOffset(-1, 0), 2),
"MW" : OpDescriptor(AwlOperator.MEM_M, 16,
AwlOffset(-1, 0), 2),
"MD" : OpDescriptor(AwlOperator.MEM_M, 32,
AwlOffset(-1, 0), 2),
"T" : OpDescriptor(AwlOperator.MEM_T, 16,
AwlOffset(-1, 0), 2),
"Z" : OpDescriptor(AwlOperator.MEM_Z, 16,
AwlOffset(-1, 0), 2),
"FC" : OpDescriptor(AwlOperator.BLKREF_FC, 16,
AwlOffset(-1, 0), 2),
"SFC" : OpDescriptor(AwlOperator.BLKREF_SFC, 16,
AwlOffset(-1, 0), 2),
"FB" : OpDescriptor(AwlOperator.BLKREF_FB, 16,
AwlOffset(-1, 0), 2),
"SFB" : OpDescriptor(AwlOperator.BLKREF_SFB, 16,
AwlOffset(-1, 0), 2),
"DB" : OpDescriptor(AwlOperator.BLKREF_DB, 16,
AwlOffset(-1, 0), 2),
"DI" : OpDescriptor(AwlOperator.BLKREF_DI, 16,
AwlOffset(-1, 0), 2),
"DBX" : OpDescriptor(AwlOperator.MEM_DB, 1,
AwlOffset(-1, -1), 2),
"DBB" : OpDescriptor(AwlOperator.MEM_DB, 8,
AwlOffset(-1, 0), 2),
"DBW" : OpDescriptor(AwlOperator.MEM_DB, 16,
AwlOffset(-1, 0), 2),
"DBD" : OpDescriptor(AwlOperator.MEM_DB, 32,
AwlOffset(-1, 0), 2),
"DIX" : OpDescriptor(AwlOperator.MEM_DI, 1,
AwlOffset(-1, -1), 2),
"DIB" : OpDescriptor(AwlOperator.MEM_DI, 8,
AwlOffset(-1, 0), 2),
"DIW" : OpDescriptor(AwlOperator.MEM_DI, 16,
AwlOffset(-1, 0), 2),
"DID" : OpDescriptor(AwlOperator.MEM_DI, 32,
AwlOffset(-1, 0), 2),
"PEB" : OpDescriptor(AwlOperator.MEM_PE, 8,
AwlOffset(-1, 0), 2),
"PEW" : OpDescriptor(AwlOperator.MEM_PE, 16,
AwlOffset(-1, 0), 2),
"PED" : OpDescriptor(AwlOperator.MEM_PE, 32,
AwlOffset(-1, 0), 2),
"PAB" : OpDescriptor(AwlOperator.MEM_PA, 8,
AwlOffset(-1, 0), 2),
"PAW" : OpDescriptor(AwlOperator.MEM_PA, 16,
AwlOffset(-1, 0), 2),
"PAD" : OpDescriptor(AwlOperator.MEM_PA, 32,
AwlOffset(-1, 0), 2),
"STW" : OpDescriptor(AwlOperator.MEM_STW, 16,
AwlOffset(0, 0), 1),
"__STW" : OpDescriptor(AwlOperator.MEM_STW, 1,
AwlOffset(0, -1), 2),
"__ACCU" : OpDescriptor(AwlOperator.VIRT_ACCU, 32,
AwlOffset(-1, 0), 2),
"__AR" : OpDescriptor(AwlOperator.VIRT_AR, 32,
AwlOffset(-1, 0), 2),
"__CNST_PI" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(pyFloatToDWord(math.pi), 0),
1),
"__CNST_E" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(pyFloatToDWord(math.e), 0),
1),
"__CNST_PINF" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(posInfDWord, 0), 1),
"__CNST_NINF" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(negInfDWord, 0), 1),
"__CNST_PNAN" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(pNaNDWord, 0), 1),
"__CNST_NNAN" : OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(nNaNDWord, 0), 1),
}
def __init__(self, insn):
self.insn = insn
@classmethod
def __translateAddressOperator(cls, opDesc, rawOps):
if len(rawOps) < 1:
raise AwlSimError("Missing address operator")
if opDesc.width == 1:
if opDesc.offset.byteOffset == 0 and opDesc.offset.bitOffset == -1:
try:
opDesc.offset.bitOffset = int(rawOps[0], 10)
except ValueError as e:
if opDesc.operType == AwlOperator.MEM_STW:
opDesc.offset.bitOffset = S7StatusWord.getBitnrByName(rawOps[0])
else:
raise AwlSimError("Invalid bit address")
else:
assert(opDesc.offset.byteOffset == -1 and opDesc.offset.bitOffset == -1)
offset = rawOps[0].split('.')
if len(offset) != 2:
raise AwlSimError("Invalid bit address")
try:
opDesc.offset.byteOffset = int(offset[0], 10)
opDesc.offset.bitOffset = int(offset[1], 10)
except ValueError as e:
raise AwlSimError("Invalid bit address")
elif opDesc.width == 8:
assert(opDesc.offset.byteOffset == -1 and opDesc.offset.bitOffset == 0)
try:
opDesc.offset.byteOffset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid byte address")
elif opDesc.width == 16:
assert(opDesc.offset.byteOffset == -1 and opDesc.offset.bitOffset == 0)
try:
opDesc.offset.byteOffset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid word address")
elif opDesc.width == 32:
assert(opDesc.offset.byteOffset == -1 and opDesc.offset.bitOffset == 0)
try:
opDesc.offset.byteOffset = int(rawOps[0], 10)
except ValueError as e:
raise AwlSimError("Invalid doubleword address")
else:
assert(0)
@classmethod
def __doTrans(cls, rawInsn, rawOps):
if rawInsn and rawInsn.block.hasLabel(rawOps[0]):
# Label reference
return OpDescriptor(AwlOperator.LBL_REF, 0,
AwlOffset(rawOps[0], 0), 1)
try:
# Constant operator (from table)
return cls.__constOperTab[rawOps[0]].dup()
except KeyError as e:
pass
# Local variable
if rawOps[0].startswith('#'):
return OpDescriptor(AwlOperator.NAMED_LOCAL, 0,
AwlOffset(rawOps[0][1:], 0), 1)
# Symbolic name
if rawOps[0].startswith('"') and rawOps[0].endswith('"'):
pass#TODO
# Immediate integer
immediate = AwlDataType.tryParseImmediate_INT(rawOps[0])
if immediate is not None:
immediate &= 0xFFFF
return OpDescriptor(AwlOperator.IMM, 16,
AwlOffset(immediate, 0), 1)
# Immediate float
immediate = AwlDataType.tryParseImmediate_REAL(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_REAL, 32,
AwlOffset(immediate, 0), 1)
# S5Time immediate
immediate = AwlDataType.tryParseImmediate_S5T(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_S5T, 0,
AwlOffset(immediate, 0), 1)
# Time immediate
immediate = AwlDataType.tryParseImmediate_TIME(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_TIME, 0,
AwlOffset(immediate, 0), 1)
# TOD immediate
immediate = AwlDataType.tryParseImmediate_TOD(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_TOD, 0,
AwlOffset(immediate, 0), 1)
# Date immediate
immediate = AwlDataType.tryParseImmediate_Date(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM_DATE, 0,
AwlOffset(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,
AwlOffset(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,
AwlOffset(immediate, 0), fields)
# Hex byte immediate
immediate = AwlDataType.tryParseImmediate_HexByte(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 8,
AwlOffset(immediate, 0), 1)
# Hex word immediate
immediate = AwlDataType.tryParseImmediate_HexWord(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 16,
AwlOffset(immediate, 0), 1)
# Hex dword immediate
immediate = AwlDataType.tryParseImmediate_HexDWord(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 32,
AwlOffset(immediate, 0), 1)
# Long integer immediate
immediate = AwlDataType.tryParseImmediate_DINT(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 32,
AwlOffset(immediate, 0), 1)
# BCD word immediate
immediate = AwlDataType.tryParseImmediate_BCD_word(rawOps[0])
if immediate is not None:
return OpDescriptor(AwlOperator.IMM, 16,
AwlOffset(immediate, 0), 1)
raise AwlSimError("Cannot parse operand: " +\
str(rawOps[0]))
@classmethod
def translateOp(cls, rawInsn, rawOps):
opDesc = cls.__doTrans(rawInsn, rawOps)
if opDesc.fieldCount == 2 and\
(opDesc.offset.byteOffset == -1 or opDesc.offset.bitOffset == -1):
cls.__translateAddressOperator(opDesc, rawOps[1:])
operator = AwlOperator(opDesc.operType, opDesc.width,
opDesc.offset.byteOffset, opDesc.offset.bitOffset)
operator.setExtended(rawOps[0].startswith("__"))
return opDesc, operator
def __translateParameterList(self, insn, rawInsn, rawOps):
while rawOps:
if len(rawOps) < 3:
raise AwlSimError("Invalid parameter assignment")
if rawOps[1] != ':=':
raise AwlSimError("Missing assignment operator (:=) "
"in parameter assignment")
# Extract l-value and r-value
commaIdx = listIndex(rawOps, ',', 2)
lvalueName = rawOps[0]
if commaIdx < 0:
rvalueTokens = rawOps[2:]
else:
rvalueTokens = rawOps[2:commaIdx]
if not rvalueTokens:
raise AwlSimError("No R-Value in parameter assignment")
# Translate r-value
opDesc, rvalueOp = self.translateOp(None, rvalueTokens)
# Create assignment
param = AwlParamAssign(lvalueName, rvalueOp)
insn.params.append(param)
rawOps = rawOps[opDesc.fieldCount + 2 : ]
if rawOps:
if rawOps[0] == ',':
rawOps = rawOps[1:]
else:
raise AwlSimError("Missing comma in parameter list")
def translateFrom(self, rawInsn):
rawOps = rawInsn.getOperators()
while rawOps:
opDesc, operator = self.translateOp(rawInsn, rawOps)
operator.setInsn(self.insn)
self.insn.ops.append(operator)
if len(rawOps) > opDesc.fieldCount:
if rawInsn.name.upper() == "CALL" and\
rawOps[opDesc.fieldCount] == '(':
try:
endIdx = rawOps.index(')', opDesc.fieldCount)
except ValueError:
raise AwlSimError("Missing closing parenthesis")
# Translate the call parameters
self.__translateParameterList(self.insn, rawInsn,
rawOps[opDesc.fieldCount + 1: endIdx])
# Consume all tokens between (and including) parenthesis.
opDesc.fieldCount = endIdx + 1
if len(rawOps) > opDesc.fieldCount:
raise AwlSimError("Trailing character after closing parenthesis")
elif rawOps[opDesc.fieldCount] == ',':
opDesc.fieldCount += 1 # Consume comma
if len(rawOps) <= opDesc.fieldCount:
raise AwlSimError("Trailing comma")
else:
raise AwlSimError("Missing comma in operator list")
rawOps = rawOps[opDesc.fieldCount : ]
|
