a275de0724d0c6fed689d6ceaef2904cf99c01a6
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 __invert__(self
):
220 return SelectableInt(~self
.value
, self
.bits
)
223 return SelectableInt(~self
.value
+ 1, self
.bits
)
225 def __lshift__(self
, b
):
226 b
= check_extsign(self
, b
)
227 return SelectableInt(self
.value
<< b
.value
, self
.bits
)
229 def __rshift__(self
, b
):
230 b
= check_extsign(self
, b
)
231 return SelectableInt(self
.value
>> b
.value
, self
.bits
)
233 def __getitem__(self
, key
):
234 if isinstance(key
, int):
235 assert key
< self
.bits
, "key %d accessing %d" % (key
, self
.bits
)
237 # NOTE: POWER 3.0B annotation order! see p4 1.3.2
238 # MSB is indexed **LOWEST** (sigh)
239 key
= self
.bits
- (key
+ 1)
241 value
= (self
.value
>> key
) & 1
242 return SelectableInt(value
, 1)
243 elif isinstance(key
, slice):
244 assert key
.step
is None or key
.step
== 1
245 assert key
.start
< key
.stop
246 assert key
.start
>= 0
247 assert key
.stop
<= self
.bits
249 stop
= self
.bits
- key
.start
250 start
= self
.bits
- key
.stop
253 #print ("__getitem__ slice num bits", bits)
254 mask
= (1 << bits
) - 1
255 value
= (self
.value
>> start
) & mask
256 return SelectableInt(value
, bits
)
258 def __setitem__(self
, key
, value
):
259 if isinstance(key
, int):
260 assert key
< self
.bits
262 key
= self
.bits
- (key
+ 1)
263 if isinstance(value
, SelectableInt
):
264 assert value
.bits
== 1
269 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
270 elif isinstance(key
, slice):
271 assert key
.step
is None or key
.step
== 1
272 assert key
.start
< key
.stop
273 assert key
.start
>= 0
274 assert key
.stop
<= self
.bits
276 stop
= self
.bits
- key
.start
277 start
= self
.bits
- key
.stop
280 #print ("__setitem__ slice num bits", bits)
281 if isinstance(value
, SelectableInt
):
282 assert value
.bits
== bits
, "%d into %d" % (value
.bits
, bits
)
284 mask
= ((1 << bits
) - 1) << start
285 value
= value
<< start
286 self
.value
= (self
.value
& ~mask
) |
(value
& mask
)
288 def __ge__(self
, other
):
289 if isinstance(other
, FieldSelectableInt
):
290 other
= other
.get_range()
291 if isinstance(other
, SelectableInt
):
292 other
= check_extsign(self
, other
)
293 assert other
.bits
== self
.bits
295 if isinstance(other
, int):
296 return onebit(self
.value
>= other
.value
)
299 def __le__(self
, other
):
300 if isinstance(other
, FieldSelectableInt
):
301 other
= other
.get_range()
302 if isinstance(other
, SelectableInt
):
303 other
= check_extsign(self
, other
)
304 assert other
.bits
== self
.bits
306 if isinstance(other
, int):
307 return onebit(self
.value
<= other
)
310 def __gt__(self
, other
):
311 if isinstance(other
, FieldSelectableInt
):
312 other
= other
.get_range()
313 if isinstance(other
, SelectableInt
):
314 other
= check_extsign(self
, other
)
315 assert other
.bits
== self
.bits
317 if isinstance(other
, int):
318 return onebit(self
.value
> other
)
321 def __lt__(self
, other
):
322 if isinstance(other
, FieldSelectableInt
):
323 other
= other
.get_range()
324 if isinstance(other
, SelectableInt
):
325 other
= check_extsign(self
, other
)
326 assert other
.bits
== self
.bits
328 if isinstance(other
, int):
329 return onebit(self
.value
< other
)
332 def __eq__(self
, other
):
333 print ("__eq__", self
, other
)
334 if isinstance(other
, FieldSelectableInt
):
335 other
= other
.get_range()
336 if isinstance(other
, SelectableInt
):
337 other
= check_extsign(self
, other
)
338 assert other
.bits
== self
.bits
340 if isinstance(other
, int):
341 return onebit(other
== self
.value
)
344 def narrow(self
, bits
):
345 assert bits
<= self
.bits
346 return SelectableInt(self
.value
, bits
)
349 return self
.value
!= 0
352 return "SelectableInt(value=0x{:x}, bits={})".format(self
.value
,
359 return SelectableInt(1 if bit
else 0, 1)
361 def selectltu(lhs
, rhs
):
362 """ less-than (unsigned)
364 if isinstance(rhs
, SelectableInt
):
366 return onebit(lhs
.value
< rhs
)
368 def selectgtu(lhs
, rhs
):
369 """ greater-than (unsigned)
371 if isinstance(rhs
, SelectableInt
):
373 return onebit(lhs
.value
> rhs
)
376 # XXX this probably isn't needed...
377 def selectassign(lhs
, idx
, rhs
):
378 if isinstance(idx
, tuple):
383 lower
, upper
, step
= idx
384 toidx
= range(lower
, upper
, step
)
385 fromidx
= range(0, upper
-lower
, step
) # XXX eurgh...
389 for t
, f
in zip(toidx
, fromidx
):
393 def selectconcat(*args
, repeat
=1):
394 if repeat
!= 1 and len(args
) == 1 and isinstance(args
[0], int):
395 args
= [SelectableInt(args
[0], 1)]
396 if repeat
!= 1: # multiplies the incoming arguments
398 for i
in range(repeat
):
403 if isinstance(i
, FieldSelectableInt
):
405 assert isinstance(i
, SelectableInt
), "can only concat SIs, sorry"
407 res
.value
= (res
.value
<< i
.bits
) | i
.value
408 print ("concat", repeat
, res
)
412 class SelectableIntTestCase(unittest
.TestCase
):
413 def test_arith(self
):
414 a
= SelectableInt(5, 8)
415 b
= SelectableInt(9, 8)
420 self
.assertEqual(c
.value
, a
.value
+ b
.value
)
421 self
.assertEqual(d
.value
, (a
.value
- b
.value
) & 0xFF)
422 self
.assertEqual(e
.value
, (a
.value
* b
.value
) & 0xFF)
423 self
.assertEqual(f
.value
, (-a
.value
) & 0xFF)
424 self
.assertEqual(c
.bits
, a
.bits
)
425 self
.assertEqual(d
.bits
, a
.bits
)
426 self
.assertEqual(e
.bits
, a
.bits
)
428 def test_logic(self
):
429 a
= SelectableInt(0x0F, 8)
430 b
= SelectableInt(0xA5, 8)
435 self
.assertEqual(c
.value
, a
.value
& b
.value
)
436 self
.assertEqual(d
.value
, a
.value | b
.value
)
437 self
.assertEqual(e
.value
, a
.value ^ b
.value
)
438 self
.assertEqual(f
.value
, 0xF0)
441 a
= SelectableInt(0xa2, 8)
442 # These should be big endian
443 self
.assertEqual(a
[7], 0)
444 self
.assertEqual(a
[0:4], 10)
445 self
.assertEqual(a
[4:8], 2)
448 a
= SelectableInt(0x5, 8)
449 a
[7] = SelectableInt(0, 1)
450 self
.assertEqual(a
, 4)
452 self
.assertEqual(a
, 9)
454 self
.assertEqual(a
, 0x39)
456 self
.assertEqual(a
, 0x99)
458 def test_concat(self
):
459 a
= SelectableInt(0x1, 1)
460 c
= selectconcat(a
, repeat
=8)
461 self
.assertEqual(c
, 0xff)
462 self
.assertEqual(c
.bits
, 8)
463 a
= SelectableInt(0x0, 1)
464 c
= selectconcat(a
, repeat
=8)
465 self
.assertEqual(c
, 0x00)
466 self
.assertEqual(c
.bits
, 8)
469 for i
in range(65536):
470 a
= SelectableInt(i
, 16)
472 self
.assertEqual(a
, b
)
475 a
= SelectableInt(10, bits
=8)
476 b
= SelectableInt(5, bits
=8)
477 self
.assertTrue(a
> b
)
478 self
.assertFalse(a
< b
)
479 self
.assertTrue(a
!= b
)
480 self
.assertFalse(a
== b
)
482 def test_unsigned(self
):
483 a
= SelectableInt(0x80, bits
=8)
484 b
= SelectableInt(0x7f, bits
=8)
485 self
.assertTrue(a
> b
)
486 self
.assertFalse(a
< b
)
487 self
.assertTrue(a
!= b
)
488 self
.assertFalse(a
== b
)
490 if __name__
== "__main__":