1 from nmigen
.hdl
.rec
import Record
, Layout
3 from soc
.decoder
.power_enums
import InternalOp
, Function
, CryIn
6 class CompALUOpSubset(Record
):
9 a copy of the relevant subset information from Decode2Execute1Type
10 needed for ALU operations. use with eq_from_execute1 (below) to
13 def __init__(self
, name
=None):
14 layout
= (('insn_type', InternalOp
),
15 ('fn_unit', Function
),
16 ('imm_data', Layout((("imm", 64), ("imm_ok", 1)))),
17 #'cr = Signal(32, reset_less=True) # NO: this is from the CR SPR
18 #'xerc = XerBits() # NO: this is from the XER SPR
20 ('rc', Layout((("rc", 1), ("rc_ok", 1)))),
21 ('oe', Layout((("oe", 1), ("oe_ok", 1)))),
24 ('input_carry', CryIn
),
30 ('data_len', 4), # TODO: should be in separate CompLDSTSubset
35 Record
.__init
__(self
, Layout(layout
), name
=name
)
37 # grrr. Record does not have kwargs
38 self
.insn_type
.reset_less
= True
39 self
.fn_unit
.reset_less
= True
40 #self.cr = Signal(32, reset_less = True
42 self
.lk
.reset_less
= True
43 self
.invert_a
.reset_less
= True
44 self
.invert_out
.reset_less
= True
45 self
.input_carry
.reset_less
= True
46 self
.output_carry
.reset_less
= True
47 self
.input_cr
.reset_less
= True
48 self
.output_cr
.reset_less
= True
49 self
.is_32bit
.reset_less
= True
50 self
.is_signed
.reset_less
= True
51 self
.data_len
.reset_less
= True
52 self
.byte_reverse
.reset_less
= True
53 self
.sign_extend
.reset_less
= True
55 def eq_from_execute1(self
, other
):
56 """ use this to copy in from Decode2Execute1Type
59 for fname
, sig
in self
.fields
.items():
60 eqfrom
= other
.fields
[fname
]
61 res
.append(sig
.eq(eqfrom
))
65 return [self
.insn_type
,