From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 21 Feb 2020 16:08:16 +0000 (+0000)
Subject: zero carry-in on __neg__
X-Git-Tag: ls180-24jan2020~131
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=71b1f65c9c7c492bbea46e641a16db4b0870880e;p=ieee754fpu.git

zero carry-in on __neg__
---

diff --git a/src/ieee754/part/partsig.py b/src/ieee754/part/partsig.py
index 75417cfd..4a2e611b 100644
--- a/src/ieee754/part/partsig.py
+++ b/src/ieee754/part/partsig.py
@@ -64,7 +64,8 @@ class PartitionedSignal:
     # unary ops that require partitioning
 
     def __neg__(self):
-        result, _ = self.add_op(self, ~0, carry=0)  # TODO, subop
+        z = Const(0, self.sig.shape())
+        result, _ = self.add_op(self, ~0, carry=z)  # TODO, subop
         return result
 
     # binary ops that don't require partitioning