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
|
#
# AWL simulator - Operator translator
# Copyright 2012 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 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),
}
@classmethod
def op2desc(cls, rawOp):
try:
#FIXME might match on label
return cls.constOperTab[rawOp].dup()
except KeyError as e:
pass
try:
immediate = int(rawOp, 10)
if immediate > 32767 or immediate < -32768:
raise AwlSimError("16-bit immediate overflow")
immediate &= 0xFFFF
return OpDescriptor(AwlOperator.IMM, 16,
immediate, 0, 1)
except ValueError:
pass
try:
immediate = float(rawOp)
immediate = pyFloatToDWord(immediate)
return OpDescriptor(AwlOperator.IMM_REAL, 32,
immediate, 0, 1)
except ValueError:
pass
rawOpUpper = rawOp.upper()
if rawOpUpper.startswith("S5T#"):
p = rawOpUpper[4:]
seconds = 0.0
while p:
if p.endswith("MS"):
mult = 0.001
p = p[:-2]
elif p.endswith("S"):
mult = 1.0
p = p[:-1]
elif p.endswith("M"):
mult = 60.0
p = p[:-1]
elif p.endswith("H"):
mult = 3600.0
p = p[:-1]
else:
raise AwlSimError("Invalid time")
if not p:
raise AwlSimError("Invalid time")
num = ""
while p and p[-1] in "0123456789":
num = p[-1] + num
p = p[:-1]
if not num:
raise AwlSimError("Invalid time")
num = int(num, 10)
seconds += num * mult
s5t = Timer.seconds_to_s5t(seconds)
return OpDescriptor(AwlOperator.IMM_S5T, 0, s5t, 0, 1)
if rawOpUpper.startswith("B#16#"):
try:
immediate = int(rawOpUpper[5:], 16)
if immediate > 0xFF:
raise ValueError
except ValueError as e:
raise AwlSimError("Invalid immediate")
return OpDescriptor(AwlOperator.IMM, 8, immediate, 0, 1)
if rawOpUpper.startswith("W#16#"):
try:
immediate = int(rawOpUpper[5:], 16)
if immediate > 0xFFFF:
raise ValueError
except ValueError as e:
raise AwlSimError("Invalid immediate")
return OpDescriptor(AwlOperator.IMM, 16, immediate, 0, 1)
if rawOpUpper.startswith("DW#16#"):
try:
immediate = int(rawOpUpper[6:], 16)
if immediate > 0xFFFFFFFF:
raise ValueError
except ValueError as e:
raise AwlSimError("Invalid immediate")
return OpDescriptor(AwlOperator.IMM, 32, immediate, 0, 1)
if rawOpUpper.startswith("L#"):
try:
immediate = int(rawOpUpper[2:], 10)
if immediate > 2147483647 or\
immediate < -2147483648:
raise AwlSimError("32-bit immediate overflow")
immediate &= 0xFFFFFFFF
except ValueError as e:
raise AwlSimError("Invalid immediate")
return OpDescriptor(AwlOperator.IMM, 32, immediate, 0, 1)
if rawOpUpper.startswith("C#"):
try:
cnt = rawOpUpper[2:]
if len(cnt) < 1 or len(cnt) > 3:
raise ValueError
a, b, c = 0, 0, 0
if cnt:
a = int(cnt[-1], 10)
cnt = cnt[:-1]
if cnt:
b = int(cnt[-1], 10)
cnt = cnt[:-1]
if cnt:
c = int(cnt[-1], 10)
cnt = cnt[:-1]
immediate = a | (b << 4) | (c << 8)
except ValueError as e:
raise AwlSimError("Invalid C# immediate")
return OpDescriptor(AwlOperator.IMM, 16, immediate, 0, 1)
if RawAwlInsn.isValidLabel(rawOp):
return OpDescriptor(AwlOperator.LBL_REF, 0, rawOp, 0, 1)
#TODO T#
#TODO TOD#
#TODO date D#
#TODO pointer P#x.y
#TODO binary immediate
raise AwlSimError("Cannot parse operand: " +\
str(rawOp))
@classmethod
def fromRawOperators(cls, rawOps):
#TODO disable extended operands by default
op = cls.op2desc(rawOps[0])
if op.fieldCount == 2:
if len(rawOps) < 2:
raise AwlSimError("Missing operator")
if op.width == 1:
if op.offset == 0 and op.bitOffset == -1:
try:
op.bitOffset = int(rawOps[1], 10)
except ValueError as e:
if op.operType == AwlOperator.MEM_STW:
op.bitOffset = S7StatusWord.getBitnrByName(rawOps[1])
else:
raise AwlSimError("Invalid bit address")
else:
assert(op.offset == -1 and op.bitOffset == -1)
offset = rawOps[1].split('.')
if len(offset) != 2:
raise AwlSimError("Invalid bit address")
try:
op.offset = int(offset[0], 10)
op.bitOffset = int(offset[1], 10)
except ValueError as e:
raise AwlSimError("Invalid bit address")
elif op.width == 8:
assert(op.offset == -1 and op.bitOffset == 0)
try:
op.offset = int(rawOps[1], 10)
except ValueError as e:
raise AwlSimError("Invalid byte address")
elif op.width == 16:
assert(op.offset == -1 and op.bitOffset == 0)
try:
op.offset = int(rawOps[1], 10)
except ValueError as e:
raise AwlSimError("Invalid word address")
elif op.width == 32:
assert(op.offset == -1 and op.bitOffset == 0)
try:
op.offset = int(rawOps[1], 10)
except ValueError as e:
raise AwlSimError("Invalid doubleword address")
else:
assert(0)
if len(rawOps) > op.fieldCount:
if rawOps[op.fieldCount] != ',':
raise AwlSimError("Missing comma in operator list")
op.fieldCount += 1 # Consume comma
if len(rawOps) <= op.fieldCount:
raise AwlSimError("Trailing comma")
return (op.fieldCount,
AwlOperator(op.operType, op.width,
op.offset, op.bitOffset)
)
|
