From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 29 May 2020 21:38:28 +0000 (+0100)
Subject: module comments for popcount
X-Git-Tag: div_pipeline~739
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=053c0fe7295bb026ab8dd7e0d3453e4bdf1aba19;p=soc.git

module comments for popcount
---

diff --git a/src/soc/fu/logical/popcount.py b/src/soc/fu/logical/popcount.py
index d655b551..e2a28207 100644
--- a/src/soc/fu/logical/popcount.py
+++ b/src/soc/fu/logical/popcount.py
@@ -1,5 +1,8 @@
-# Popcount
-from nmigen import (Elaboratable, Module, Signal, Cat, Mux, Const)
+# Popcount: a successive (cascading) sum-reduction algorithm starting from
+# single-bit adds and reducing down to one final answer: the total number of
+# bits set to "1" in the input.
+
+from nmigen import (Elaboratable, Module, Signal, Cat, Const)
 
 
 def array_of(count, bitwidth):