From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 1 Nov 2021 09:53:13 +0000 (+0000)
Subject: code comments for core
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2514f13bfd61177284fdc52884eae4f7d167ce4e;p=soc.git

code comments for core
---

diff --git a/src/soc/simple/core.py b/src/soc/simple/core.py
index 65643115..a381059c 100644
--- a/src/soc/simple/core.py
+++ b/src/soc/simple/core.py
@@ -163,6 +163,9 @@ class NonProductionCore(Elaboratable):
 
         # connect decoders
         for k, v in self.decoders.items():
+            # connect each satellite decoder and give it the instruction.
+            # as subset decoders this massively reduces wire fanout given
+            # the large number of ALUs
             setattr(m.submodules, "dec_%s" % v.fn_name, v)
             comb += v.dec.raw_opcode_in.eq(self.raw_insn_i)
             comb += v.dec.bigendian.eq(self.bigendian_i)