From: Sebastien Bourdeauducq <sebastien@milkymist.org>
Date: Mon, 25 Mar 2013 14:54:09 +0000 (+0100)
Subject: actorlib/structuring/Cast: support inversion
X-Git-Tag: 24jan2021_ls180~2099^2~623
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=77a0f0a3bb4b971bb30643935c295940680b72c1;p=litex.git

actorlib/structuring/Cast: support inversion
---

diff --git a/migen/actorlib/structuring.py b/migen/actorlib/structuring.py
index 6f6483b2..dbe2204a 100644
--- a/migen/actorlib/structuring.py
+++ b/migen/actorlib/structuring.py
@@ -8,14 +8,20 @@ def _rawbits_layout(l):
 		return l
 
 class Cast(CombinatorialActor):
-	def __init__(self, layout_from, layout_to):
+	def __init__(self, layout_from, layout_to, reverse_from=False, reverse_to=False):
+		self.reverse_from = reverse_from
+		self.reverse_to = reverse_to
 		CombinatorialActor.__init__(self,
 			("sink", Sink, _rawbits_layout(layout_from)),
 			("source", Source, _rawbits_layout(layout_to)))
 	
 	def get_process_fragment(self):
 		sigs_from = self.token("sink").flatten()
+		if self.reverse_from:
+			sigs_from = list(reversed(sigs_from))
 		sigs_to = self.token("source").flatten()
+		if self.reverse_to:
+			sigs_to = list(reversed(sigs_to))
 		if sum(len(s) for s in sigs_from) != sum(len(s) for s in sigs_to):
 			raise TypeError
 		return Fragment([