3 from soc
.decoder
.power_fields
import BitRange
4 from operator
import (add
, sub
, mul
, truediv
, mod
, or_
, and_
, xor
, neg
, inv
)
7 def check_extsign(a
, b
):
8 if isinstance(b
, FieldSelectableInt
):
10 if isinstance(b
, int):
11 return SelectableInt(b
, a
.bits
)
14 return SelectableInt(b
.value
, a
.bits
)
17 class FieldSelectableInt
:
18 """FieldSelectableInt: allows bit-range selection onto another target
20 def __init__(self
, si
, br
):
21 self
.si
= si
# target selectable int
22 if isinstance(br
, list) or isinstance(br
, tuple):
24 for i
, v
in enumerate(br
):
27 self
.br
= br
# map of indices.
30 if isinstance(b
, SelectableInt
):
31 for i
in range(b
.bits
):
47 def __getitem__(self
, key
):
48 print ("getitem", key
, self
.br
)
49 if isinstance(key
, SelectableInt
):
51 if isinstance(key
, int):
52 key
= self
.br
[key
] # don't do POWER 1.3.4 bit-inversion
54 if isinstance(key
, slice):
56 return selectconcat(*[self
.si
[x
] for x
in key
])
58 def __setitem__(self
, key
, value
):
59 if isinstance(key
, SelectableInt
):
61 key
= self
.br
[key
] # don't do POWER 1.3.4 bit-inversion
62 if isinstance(key
, int):
63 return self
.si
.__setitem
__(key
, value
)
65 if not isinstance(value
, SelectableInt
):
66 value
= SelectableInt(value
, bits
=len(key
))
67 for i
, k
in enumerate(key
):
71 return self
._op
1(negate
)
75 return self
._op
(add
, b
)
77 return self
._op
(sub
, b
)
79 return self
._op
(mul
, b
)
81 return self
._op
(truediv
, b
)
83 return self
._op
(mod
, b
)
85 return self
._op
(and_
, b
)
87 return self
._op
(or_
, b
)
89 return self
._op
(xor
, b
)
92 print ("get_range", self
.si
)
93 vi
= SelectableInt(0, len(self
.br
))
94 for k
, v
in self
.br
.items():
95 print ("get_range", k
, v
, self
.si
[v
])
97 print ("get_range", vi
)
102 for i
, v
in fi
.br
.items():
107 return "FieldSelectableInt(si=%s, br=%s)" % (self
.si
, self
.br
)
110 class FieldSelectableIntTestCase(unittest
.TestCase
):
111 def test_arith(self
):
112 a
= SelectableInt(0b10101, 5)
113 b
= SelectableInt(0b011, 3)
118 fs
= FieldSelectableInt(a
, br
)
121 #self.assertEqual(c.value, a.value + b.value)
123 def test_select(self
):
124 a
= SelectableInt(0b00001111, 8)
130 fs
= FieldSelectableInt(a
, br
)
132 self
.assertEqual(fs
.get_range(), 0b0011)
134 def test_select_range(self
):
135 a
= SelectableInt(0b00001111, 8)
141 fs
= FieldSelectableInt(a
, br
)
143 self
.assertEqual(fs
[2:4], 0b11)
146 self
.assertEqual(fs
.get_range(), 0b1011)
151 def __init__(self
, value
, bits
):
152 mask
= (1 << bits
) - 1
153 self
.value
= value
& mask
160 def __add__(self
, b
):
161 if isinstance(b
, int):
162 b
= SelectableInt(b
, self
.bits
)
163 b
= check_extsign(self
, b
)
164 assert b
.bits
== self
.bits
165 return SelectableInt(self
.value
+ b
.value
, self
.bits
)
167 def __sub__(self
, b
):
168 if isinstance(b
, int):
169 b
= SelectableInt(b
, self
.bits
)
170 b
= check_extsign(self
, b
)
171 assert b
.bits
== self
.bits
172 return SelectableInt(self
.value
- b
.value
, self
.bits
)
174 def __rsub__(self
, b
):
175 if isinstance(b
, int):
176 b
= SelectableInt(b
, self
.bits
)
177 b
= check_extsign(self
, b
)
178 assert b
.bits
== self
.bits
179 return SelectableInt(b
.value
- self
.value
, self
.bits
)
181 def __radd__(self
, b
):
182 if isinstance(b
, int):
183 b
= SelectableInt(b
, self
.bits
)
184 b
= check_extsign(self
, b
)
185 assert b
.bits
== self
.bits
186 return SelectableInt(b
.value
+ self
.value
, self
.bits
)
188 def __mul__(self
, b
):
189 b
= check_extsign(self
, b
)
190 assert b
.bits
== self
.bits
191 return SelectableInt(self
.value
* b
.value
, self
.bits
)
193 def __div__(self
, b
):
194 b
= check_extsign(self
, b
)
195 assert b
.bits
== self
.bits
196 return SelectableInt(self
.value
/ b
.value
, self
.bits
)
198 def __mod__(self
, b
):
199 b
= check_extsign(self
, b
)
200 assert b
.bits
== self
.bits
201 return SelectableInt(self
.value
% b
.value
, self
.bits
)
204 b
= check_extsign(self
, b
)
205 assert b
.bits
== self
.bits
206 return SelectableInt(self
.value | b
.value
, self
.bits
)
208 def __and__(self
, b
):
209 print ("__and__", self
, b
)
210 b
= check_extsign(self
, b
)
211 assert b
.bits
== self
.bits
212 return SelectableInt(self
.value
& b
.value
, self
.bits
)
214 def __xor__(self
, b
):
215 b
= check_extsign(self
, b
)
216 assert b
.bits
== self
.bits
217 return SelectableInt(self
.value ^ b
.value
, self
.bits
)
219 def __rxor__(self
, b
):
220 b
= check_extsign(self
, b
)
221 assert b
.bits
== self
.bits
222 return SelectableInt(self
.value ^ b
.value
, self
.bits
)
224 def __invert__(self
):
225 return SelectableInt(~self
.value
, self
.bits
)
228 return SelectableInt(~self
.value
+ 1, self
.bits
)
230 def __lshift__(self
, b
):
231 b
= check_extsign(self
, b
)
232 return SelectableInt(self
.value
<< b
.value
, self
.bits
)
234 def __rshift__(self
, b
):
235 b
= check_extsign(self
, b
)
236 return SelectableInt(self
.value
>> b
.value
, self
.bits
)
238 def __getitem__(self
, key
):
239 if isinstance(key
, int):
240 assert key
< self
.bits
, "key %d accessing %d" % (key
, self
.bits
)
242 # NOTE: POWER 3.0B annotation order! see p4 1.3.2
243 # MSB is indexed **LOWEST** (sigh)
244 key
= self
.bits
- (key
+ 1)
246 value
= (self
.value
>> key
) & 1
247 return SelectableInt(value
, 1)
248 elif isinstance(key
, slice):
249 assert key
.step
is None or key
.step
== 1
250 assert key
.start
< key
.stop
251 assert key
.start
>= 0
252 assert key
.stop
<= self
.bits
254 stop
= self
.bits
- key
.start
255 start
= self
.bits
- key
.stop
258 #print ("__getitem__ slice num bits", bits)
259 mask
= (1 << bits
) - 1
260 value
= (self
.value
>> start
) & mask
261 return SelectableInt(value
, bits
)
263 def __setitem__(self
, key
, value
):
264 if isinstance(key
, int):
265 assert key
< self
.bits
267 key
= self
.bits
- (key
+ 1)
268 if isinstance(value
, SelectableInt
):
269 assert value
.bits
== 1
274 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
275 elif isinstance(key
, slice):
276 assert key
.step
is None or key
.step
== 1
277 assert key
.start
< key
.stop
278 assert key
.start
>= 0
279 assert key
.stop
<= self
.bits
281 stop
= self
.bits
- key
.start
282 start
= self
.bits
- key
.stop
285 #print ("__setitem__ slice num bits", bits)
286 if isinstance(value
, SelectableInt
):
287 assert value
.bits
== bits
, "%d into %d" % (value
.bits
, bits
)
289 mask
= ((1 << bits
) - 1) << start
290 value
= value
<< start
291 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
293 def __ge__(self
, other
):
294 if isinstance(other
, FieldSelectableInt
):
295 other
= other
.get_range()
296 if isinstance(other
, SelectableInt
):
297 other
= check_extsign(self
, other
)
298 assert other
.bits
== self
.bits
300 if isinstance(other
, int):
301 return onebit(self
.value
>= other
.value
)
304 def __le__(self
, other
):
305 if isinstance(other
, FieldSelectableInt
):
306 other
= other
.get_range()
307 if isinstance(other
, SelectableInt
):
308 other
= check_extsign(self
, other
)
309 assert other
.bits
== self
.bits
311 if isinstance(other
, int):
312 return onebit(self
.value
<= other
)
315 def __gt__(self
, other
):
316 if isinstance(other
, FieldSelectableInt
):
317 other
= other
.get_range()
318 if isinstance(other
, SelectableInt
):
319 other
= check_extsign(self
, other
)
320 assert other
.bits
== self
.bits
322 if isinstance(other
, int):
323 return onebit(self
.value
> other
)
326 def __lt__(self
, other
):
327 if isinstance(other
, FieldSelectableInt
):
328 other
= other
.get_range()
329 if isinstance(other
, SelectableInt
):
330 other
= check_extsign(self
, other
)
331 assert other
.bits
== self
.bits
333 if isinstance(other
, int):
334 return onebit(self
.value
< other
)
337 def __eq__(self
, other
):
338 print ("__eq__", self
, other
)
339 if isinstance(other
, FieldSelectableInt
):
340 other
= other
.get_range()
341 if isinstance(other
, SelectableInt
):
342 other
= check_extsign(self
, other
)
343 assert other
.bits
== self
.bits
345 if isinstance(other
, int):
346 return onebit(other
== self
.value
)
349 def narrow(self
, bits
):
350 assert bits
<= self
.bits
351 return SelectableInt(self
.value
, bits
)
354 return self
.value
!= 0
357 return "SelectableInt(value=0x{:x}, bits={})".format(self
.value
,
364 return SelectableInt(1 if bit
else 0, 1)
366 def selectltu(lhs
, rhs
):
367 """ less-than (unsigned)
369 if isinstance(rhs
, SelectableInt
):
371 return onebit(lhs
.value
< rhs
)
373 def selectgtu(lhs
, rhs
):
374 """ greater-than (unsigned)
376 if isinstance(rhs
, SelectableInt
):
378 return onebit(lhs
.value
> rhs
)
381 # XXX this probably isn't needed...
382 def selectassign(lhs
, idx
, rhs
):
383 if isinstance(idx
, tuple):
388 lower
, upper
, step
= idx
389 toidx
= range(lower
, upper
, step
)
390 fromidx
= range(0, upper
-lower
, step
) # XXX eurgh...
394 for t
, f
in zip(toidx
, fromidx
):
398 def selectconcat(*args
, repeat
=1):
399 if repeat
!= 1 and len(args
) == 1 and isinstance(args
[0], int):
400 args
= [SelectableInt(args
[0], 1)]
401 if repeat
!= 1: # multiplies the incoming arguments
403 for i
in range(repeat
):
408 if isinstance(i
, FieldSelectableInt
):
410 assert isinstance(i
, SelectableInt
), "can only concat SIs, sorry"
412 res
.value
= (res
.value
<< i
.bits
) | i
.value
413 print ("concat", repeat
, res
)
417 class SelectableIntTestCase(unittest
.TestCase
):
418 def test_arith(self
):
419 a
= SelectableInt(5, 8)
420 b
= SelectableInt(9, 8)
425 self
.assertEqual(c
.value
, a
.value
+ b
.value
)
426 self
.assertEqual(d
.value
, (a
.value
- b
.value
) & 0xFF)
427 self
.assertEqual(e
.value
, (a
.value
* b
.value
) & 0xFF)
428 self
.assertEqual(f
.value
, (-a
.value
) & 0xFF)
429 self
.assertEqual(c
.bits
, a
.bits
)
430 self
.assertEqual(d
.bits
, a
.bits
)
431 self
.assertEqual(e
.bits
, a
.bits
)
433 def test_logic(self
):
434 a
= SelectableInt(0x0F, 8)
435 b
= SelectableInt(0xA5, 8)
440 self
.assertEqual(c
.value
, a
.value
& b
.value
)
441 self
.assertEqual(d
.value
, a
.value | b
.value
)
442 self
.assertEqual(e
.value
, a
.value ^ b
.value
)
443 self
.assertEqual(f
.value
, 0xF0)
446 a
= SelectableInt(0xa2, 8)
447 # These should be big endian
448 self
.assertEqual(a
[7], 0)
449 self
.assertEqual(a
[0:4], 10)
450 self
.assertEqual(a
[4:8], 2)
453 a
= SelectableInt(0x5, 8)
454 a
[7] = SelectableInt(0, 1)
455 self
.assertEqual(a
, 4)
457 self
.assertEqual(a
, 9)
459 self
.assertEqual(a
, 0x39)
461 self
.assertEqual(a
, 0x99)
463 def test_concat(self
):
464 a
= SelectableInt(0x1, 1)
465 c
= selectconcat(a
, repeat
=8)
466 self
.assertEqual(c
, 0xff)
467 self
.assertEqual(c
.bits
, 8)
468 a
= SelectableInt(0x0, 1)
469 c
= selectconcat(a
, repeat
=8)
470 self
.assertEqual(c
, 0x00)
471 self
.assertEqual(c
.bits
, 8)
474 for i
in range(65536):
475 a
= SelectableInt(i
, 16)
477 self
.assertEqual(a
, b
)
480 a
= SelectableInt(10, bits
=8)
481 b
= SelectableInt(5, bits
=8)
482 self
.assertTrue(a
> b
)
483 self
.assertFalse(a
< b
)
484 self
.assertTrue(a
!= b
)
485 self
.assertFalse(a
== b
)
487 def test_unsigned(self
):
488 a
= SelectableInt(0x80, bits
=8)
489 b
= SelectableInt(0x7f, bits
=8)
490 self
.assertTrue(a
> b
)
491 self
.assertFalse(a
< b
)
492 self
.assertTrue(a
!= b
)
493 self
.assertFalse(a
== b
)
495 if __name__
== "__main__":