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actorlib/structuring: add reverse parameter to Unpack and Pack

This commit is contained in:
Florent Kermarrec 2014-09-17 16:53:20 +02:00 committed by Sebastien Bourdeauducq
parent 6c9810532b
commit 967b73bef3
1 changed files with 10 additions and 8 deletions
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10
migen/actorlib/structuring.py
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@ -29,7 +29,7 @@ def pack_layout(l, n):
return [("chunk"+str(i), l) for i in range(n)]
class Unpack(Module):
def __init__(self, n, layout_to):
def __init__(self, n, layout_to, reverse=False):
self.sink = Sink(pack_layout(layout_to, n))
self.source = Source(layout_to)
self.busy = Signal()
@ -54,11 +54,12 @@ class Unpack(Module):
]
cases = {}
for i in range(n):
cases[i] = [self.source.payload.raw_bits().eq(getattr(self.sink.payload, "chunk"+str(i)).raw_bits())]
chunk = n-i-1 if reverse else i
cases[i] = [self.source.payload.raw_bits().eq(getattr(self.sink.payload, "chunk"+str(chunk)).raw_bits())]
self.comb += Case(mux, cases).makedefault()
class Pack(Module):
def __init__(self, layout_from, n):
def __init__(self, layout_from, n, reverse=False):
self.sink = Sink(layout_from)
self.source = Source(pack_layout(layout_from, n))
self.busy = Signal()
@ -71,7 +72,8 @@ class Pack(Module):
strobe_all = Signal()
cases = {}
for i in range(n):
cases[i] = [getattr(self.source.payload, "chunk"+str(i)).raw_bits().eq(self.sink.payload.raw_bits())]
chunk = n-i-1 if reverse else i
cases[i] = [getattr(self.source.payload, "chunk"+str(chunk)).raw_bits().eq(self.sink.payload.raw_bits())]
self.comb += [
self.busy.eq(strobe_all),
self.sink.ack.eq(~strobe_all | self.source.ack),