From: Robert Jordens <jordens@gmail.com>
Date: Fri, 25 Jul 2014 05:45:41 +0000 (-0600)
Subject: migen.fhdl.structure: add Signal.like(other)
X-Git-Tag: 24jan2021_ls180~2099^2~341
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=44c6e524ba97bab1f491d1d56d0a66ac371761cf;p=litex.git

migen.fhdl.structure: add Signal.like(other)

This is a convenience method. Signal(flen(other)) is used frequently but that
drops the signedness. Signal((other.nbits, other.signed)) would be correct but
is long.
---

diff --git a/migen/fhdl/structure.py b/migen/fhdl/structure.py
index 7ab42545..aa33888e 100644
--- a/migen/fhdl/structure.py
+++ b/migen/fhdl/structure.py
@@ -274,6 +274,20 @@ class Signal(Value):
 	def __repr__(self):
 		return "<Signal " + (self.backtrace[-1][0] or "anonymous") + " at " + hex(id(self)) + ">"
 
+	@classmethod
+	def like(cls, other):
+		"""Create Signal based on another.
+
+		Parameters
+		----------
+		other : Value
+			Object to base this Signal on.
+
+		See `migen.fhdl.bitcontainer.value_bits_sign`() for details.
+		"""
+		from migen.fhdl.bitcontainer import value_bits_sign
+		return cls(value_bits_sign(other))
+
 class ClockSignal(Value):
 	"""Clock signal for a given clock domain