From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 19 Feb 2019 05:39:14 +0000 (+0000)
Subject: comment for a + -a special case add
X-Git-Tag: ls180-24jan2020~1876
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=47115959f204429fdbe22446e40b64ae6c6a79be;p=ieee754fpu.git

comment for a + -a special case add
---

diff --git a/src/add/nmigen_add_experiment.py b/src/add/nmigen_add_experiment.py
index 7d9ccb71..38cd8d78 100644
--- a/src/add/nmigen_add_experiment.py
+++ b/src/add/nmigen_add_experiment.py
@@ -88,6 +88,7 @@ class FPADD(FPBase):
                     m.next = "put_z"
                     m.d.sync += z.create(a.s, a.e, a.m[3:-1])
 
+                # if a equal to -b return zero (+ve zero)
                 with m.Elif((a.s != b.s) & (a.m == b.m) & (a.e == b.e)):
                     m.next = "put_z"
                     m.d.sync += z.zero(0)