3 from soc
.decoder
.power_fields
import BitRange
4 from operator
import (add
, sub
, mul
, div
, mod
, or_
, and_
, xor
, neg
, inv
)
7 def check_extsign(a
, b
):
10 return SelectableInt(b
.value
, a
.bits
)
13 class FieldSelectableInt
:
14 """FieldSelectableInt: allows bit-range selection onto another target
16 def __init__(self
, si
, br
):
17 self
.si
= si
# target selectable int
18 if isinstance(br
, list) or isinstance(br
, tuple):
20 for i
, v
in enumerate(br
):
23 self
.br
= br
# map of indices.
35 def __getitem__(self
, key
):
39 def __setitem__(self
, key
, value
)
41 return self
.si__setitem__(key
, value
)
44 return self
._op
1(negate
)
48 return self
._op
(add
, b
)
50 return self
._op
(sub
, b
)
52 return self
._op
(mul
, b
)
54 return self
._op
(div
, b
)
56 return self
._op
(and_
, b
)
58 return self
._op
(or_
, b
)
60 return self
._op
(xor
, b
)
63 print ("get_range", self
.si
)
64 vi
= SelectableInt(0, len(self
.br
))
65 for k
, v
in self
.br
.items():
66 print ("get_range", k
, v
, self
.si
[v
])
68 print ("get_range", vi
)
73 for i
, v
in fi
.br
.items():
78 return "FieldSelectableInt(si=%s, br=%s)" % (self
.si
, self
.br
)
81 class FieldSelectableIntTestCase(unittest
.TestCase
):
83 a
= SelectableInt(0b10101, 5)
84 b
= SelectableInt(0b011, 3)
89 fs
= FieldSelectableInt(a
, br
)
92 #self.assertEqual(c.value, a.value + b.value)
96 def __init__(self
, value
, bits
):
97 mask
= (1 << bits
) - 1
98 self
.value
= value
& mask
101 def __add__(self
, b
):
102 if isinstance(b
, int):
103 b
= SelectableInt(b
, self
.bits
)
104 b
= check_extsign(self
, b
)
105 assert b
.bits
== self
.bits
106 return SelectableInt(self
.value
+ b
.value
, self
.bits
)
108 def __sub__(self
, b
):
109 if isinstance(b
, int):
110 b
= SelectableInt(b
, self
.bits
)
111 b
= check_extsign(self
, b
)
112 assert b
.bits
== self
.bits
113 return SelectableInt(self
.value
- b
.value
, self
.bits
)
115 def __mul__(self
, b
):
116 b
= check_extsign(self
, b
)
117 assert b
.bits
== self
.bits
118 return SelectableInt(self
.value
* b
.value
, self
.bits
)
120 def __div__(self
, b
):
121 b
= check_extsign(self
, b
)
122 assert b
.bits
== self
.bits
123 return SelectableInt(self
.value
/ b
.value
, self
.bits
)
125 def __mod__(self
, b
):
126 b
= check_extsign(self
, b
)
127 assert b
.bits
== self
.bits
128 return SelectableInt(self
.value
% b
.value
, self
.bits
)
131 b
= check_extsign(self
, b
)
132 assert b
.bits
== self
.bits
133 return SelectableInt(self
.value | b
.value
, self
.bits
)
135 def __and__(self
, b
):
136 b
= check_extsign(self
, b
)
137 assert b
.bits
== self
.bits
138 return SelectableInt(self
.value
& b
.value
, self
.bits
)
140 def __xor__(self
, b
):
141 b
= check_extsign(self
, b
)
142 assert b
.bits
== self
.bits
143 return SelectableInt(self
.value ^ b
.value
, self
.bits
)
145 def __invert__(self
):
146 return SelectableInt(~self
.value
, self
.bits
)
149 return SelectableInt(~self
.value
+ 1, self
.bits
)
151 def __getitem__(self
, key
):
152 if isinstance(key
, int):
153 assert key
< self
.bits
, "key %d accessing %d" % (key
, self
.bits
)
155 # NOTE: POWER 3.0B annotation order! see p4 1.3.2
156 # MSB is indexed **LOWEST** (sigh)
157 key
= self
.bits
- (key
+ 1)
159 value
= (self
.value
>> key
) & 1
160 return SelectableInt(value
, 1)
161 elif isinstance(key
, slice):
162 assert key
.step
is None or key
.step
== 1
163 assert key
.start
< key
.stop
164 assert key
.start
>= 0
165 assert key
.stop
<= self
.bits
167 stop
= self
.bits
- key
.start
168 start
= self
.bits
- key
.stop
170 bits
= stop
- start
+ 1
171 mask
= (1 << bits
) - 1
172 value
= (self
.value
>> start
) & mask
173 return SelectableInt(value
, bits
)
175 def __setitem__(self
, key
, value
):
176 if isinstance(key
, int):
177 assert key
< self
.bits
179 key
= self
.bits
- (key
+ 1)
180 if isinstance(value
, SelectableInt
):
181 assert value
.bits
== 1
186 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
187 elif isinstance(key
, slice):
188 assert key
.step
is None or key
.step
== 1
189 assert key
.start
< key
.stop
190 assert key
.start
>= 0
191 assert key
.stop
<= self
.bits
193 stop
= self
.bits
- key
.start
194 start
= self
.bits
- key
.stop
196 bits
= stop
- start
+ 1
197 if isinstance(value
, SelectableInt
):
198 assert value
.bits
== bits
, "%d into %d" % (value
.bits
, bits
)
200 mask
= ((1 << bits
) - 1) << start
201 value
= value
<< start
202 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
204 def __ge__(self
, other
):
205 if isinstance(other
, SelectableInt
):
206 other
= check_extsign(self
, other
)
207 assert other
.bits
== self
.bits
209 if isinstance(other
, int):
210 return other
>= self
.value
213 def __le__(self
, other
):
214 if isinstance(other
, SelectableInt
):
215 other
= check_extsign(self
, other
)
216 assert other
.bits
== self
.bits
218 if isinstance(other
, int):
219 return onebit(other
<= self
.value
)
222 def __gt__(self
, other
):
223 if isinstance(other
, SelectableInt
):
224 other
= check_extsign(self
, other
)
225 assert other
.bits
== self
.bits
227 if isinstance(other
, int):
228 return onebit(other
> self
.value
)
231 def __lt__(self
, other
):
232 if isinstance(other
, SelectableInt
):
233 other
= check_extsign(self
, other
)
234 assert other
.bits
== self
.bits
236 if isinstance(other
, int):
237 return onebit(other
< self
.value
)
240 def __eq__(self
, other
):
241 if isinstance(other
, SelectableInt
):
242 other
= check_extsign(self
, other
)
243 assert other
.bits
== self
.bits
245 if isinstance(other
, int):
246 return onebit(other
== self
.value
)
249 def narrow(self
, bits
):
250 assert bits
<= self
.bits
251 return SelectableInt(self
.value
, bits
)
254 return self
.value
!= 0
257 return "SelectableInt(value=0x{:x}, bits={})".format(self
.value
,
261 return SelectableInt(1 if bit
else 0, 1)
263 def selectltu(lhs
, rhs
):
264 """ less-than (unsigned)
266 if isinstance(rhs
, SelectableInt
):
268 return onebit(lhs
.value
< rhs
)
270 def selectgtu(lhs
, rhs
):
271 """ greater-than (unsigned)
273 if isinstance(rhs
, SelectableInt
):
275 return onebit(lhs
.value
> rhs
)
278 # XXX this probably isn't needed...
279 def selectassign(lhs
, idx
, rhs
):
280 if isinstance(idx
, tuple):
285 lower
, upper
, step
= idx
286 toidx
= range(lower
, upper
, step
)
287 fromidx
= range(0, upper
-lower
, step
) # XXX eurgh...
291 for t
, f
in zip(toidx
, fromidx
):
295 def selectconcat(*args
, repeat
=1):
296 if repeat
!= 1 and len(args
) == 1 and isinstance(args
[0], int):
297 args
= [SelectableInt(args
[0], 1)]
298 if repeat
!= 1: # multiplies the incoming arguments
300 for i
in range(repeat
):
305 assert isinstance(i
, SelectableInt
), "can only concat SIs, sorry"
307 res
.value
= (res
.value
<< i
.bits
) | i
.value
308 print ("concat", repeat
, res
)
312 class SelectableIntTestCase(unittest
.TestCase
):
313 def test_arith(self
):
314 a
= SelectableInt(5, 8)
315 b
= SelectableInt(9, 8)
320 self
.assertEqual(c
.value
, a
.value
+ b
.value
)
321 self
.assertEqual(d
.value
, (a
.value
- b
.value
) & 0xFF)
322 self
.assertEqual(e
.value
, (a
.value
* b
.value
) & 0xFF)
323 self
.assertEqual(f
.value
, (-a
.value
) & 0xFF)
324 self
.assertEqual(c
.bits
, a
.bits
)
325 self
.assertEqual(d
.bits
, a
.bits
)
326 self
.assertEqual(e
.bits
, a
.bits
)
328 def test_logic(self
):
329 a
= SelectableInt(0x0F, 8)
330 b
= SelectableInt(0xA5, 8)
335 self
.assertEqual(c
.value
, a
.value
& b
.value
)
336 self
.assertEqual(d
.value
, a
.value | b
.value
)
337 self
.assertEqual(e
.value
, a
.value ^ b
.value
)
338 self
.assertEqual(f
.value
, 0xF0)
341 a
= SelectableInt(0xa2, 8)
342 # These should be big endian
343 self
.assertEqual(a
[7], 0)
344 self
.assertEqual(a
[0:4], 10)
345 self
.assertEqual(a
[4:8], 2)
348 a
= SelectableInt(0x5, 8)
349 a
[7] = SelectableInt(0, 1)
350 self
.assertEqual(a
, 4)
352 self
.assertEqual(a
, 9)
354 self
.assertEqual(a
, 0x39)
356 self
.assertEqual(a
, 0x199)
358 def test_concat(self
):
359 a
= SelectableInt(0x1, 1)
360 c
= selectconcat(a
, repeat
=8)
361 self
.assertEqual(c
, 0xff)
362 self
.assertEqual(c
.bits
, 8)
363 a
= SelectableInt(0x0, 1)
364 c
= selectconcat(a
, repeat
=8)
365 self
.assertEqual(c
, 0x00)
366 self
.assertEqual(c
.bits
, 8)
369 for i
in range(65536):
370 a
= SelectableInt(i
, 16)
372 self
.assertEqual(a
, b
)
374 if __name__
== "__main__":