1 from nmutil
.concurrentunit
import PipeContext
2 from nmutil
.dynamicpipe
import SimpleHandshakeRedir
3 from nmigen
import Signal
4 from openpower
.decoder
.power_decoder2
import Data
5 from soc
.fu
.regspec
import get_regspec_bitwidth
9 """FUBaseData: base class for all pipeline data structures
11 see README.md for explanation of parameters and purpose.
13 note the mode parameter - output. XXXInputData specs must
14 have this set to "False", and XXXOutputData specs (and anything
15 that creates intermediary outputs which propagate through a
16 pipeline *to* output) must have it set to "True".
19 def __init__(self
, pspec
, output
, exc_kls
=None):
20 self
.ctx
= PipeContext(pspec
) # context for ReservationStation usage
21 self
.muxid
= self
.ctx
.muxid
23 self
.is_output
= output
24 # take regspec and create data attributes (in or out)
25 # TODO: use widspec to create reduced bit mapping.
26 for i
, (regfile
, regname
, widspec
) in enumerate(self
.regspec
):
27 wid
= get_regspec_bitwidth([self
.regspec
], 0, i
)
29 sig
= Data(wid
, name
=regname
)
31 sig
= Signal(wid
, name
=regname
, reset_less
=True)
32 setattr(self
, regname
, sig
)
34 # optional exception type
35 if exc_kls
is not None:
36 name
= "exc_o" if output
else "exc_i"
37 self
.exception
= exc_kls(name
=name
)
42 if hasattr(self
, "exception"):
43 yield from self
.exception
.ports()
46 eqs
= [self
.ctx
.eq(i
.ctx
)]
47 assert len(self
.data
) == len(i
.data
), \
48 "length of %s mismatch against %s: %s %s" % \
49 (repr(self
), repr(i
), repr(self
.data
), repr(i
.data
))
50 for j
in range(len(self
.data
)):
51 assert type(self
.data
[j
]) == type(i
.data
[j
]), \
52 "type mismatch in FUBaseData %s %s" % \
53 (repr(self
.data
[j
]), repr(i
.data
[j
]))
54 eqs
.append(self
.data
[j
].eq(i
.data
[j
]))
55 if hasattr(self
, "exception"):
56 eqs
.append(self
.exception
.eq(i
.exception
))
60 return self
.ctx
.ports() # TODO: include self.data
63 # hmmm there has to be a better way than this
64 def get_rec_width(rec
):
66 # Setup random inputs for dut.op
74 """CommonPipeSpec: base class for all pipeline specifications
75 see README.md for explanation of members.
77 def __init__(self
, id_wid
):
78 self
.pipekls
= SimpleHandshakeRedir
80 self
.opkls
= lambda _
: self
.opsubsetkls()
81 self
.op_wid
= get_rec_width(self
.opkls(None)) # hmm..