From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 17 Apr 2019 06:46:12 +0000 (+0100)
Subject: clarify pipe mode comments
X-Git-Tag: ls180-24jan2020~1225
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=878888f1eabcc8ed7bd80087aa3a84faf9ee7ed4;p=ieee754fpu.git

clarify pipe mode comments
---

diff --git a/src/add/queue.py b/src/add/queue.py
index 015c357e..e52ab5e9 100644
--- a/src/add/queue.py
+++ b/src/add/queue.py
@@ -135,7 +135,8 @@ class Queue(FIFOInterface):
                 with m.If(n_i_ready):
                     m.d.comb += do_enq.eq(0)
 
-        # pipe mode: read-enabled requires writability.
+        # pipe mode: if next stage says it's ready (readable), we
+        #            *must* declare the input ready (writeable).
         if self.pipe:
             with m.If(n_i_ready):
                 m.d.comb += p_o_ready.eq(1)