From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 14 Feb 2019 12:47:01 +0000 (+0000)
Subject: fix bug in nan/inf, exp-bias needed subtracting
X-Git-Tag: ls180-24jan2020~2000
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7a596346d426eb2dac0110759e5d1842ec76340f;p=ieee754fpu.git

fix bug in nan/inf, exp-bias needed subtracting
---

diff --git a/src/add/nmigen_add_experiment.py b/src/add/nmigen_add_experiment.py
index 68d15bd4..914074c9 100644
--- a/src/add/nmigen_add_experiment.py
+++ b/src/add/nmigen_add_experiment.py
@@ -42,10 +42,10 @@ class FPNum:
                            Cat(self.m[0] | self.m[1], self.m[1:-5], 0))
 
     def nan(self, s):
-        return self.create(s, 0xff, 1<<22)
+        return self.create(s, 0x80, 1<<22)
 
     def inf(self, s):
-        return self.create(s, 0xff, 0)
+        return self.create(s, 0x80, 0)
 
     def is_nan(self):
         return (self.e == 128) & (self.m != 0)