From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 9 Jul 2020 12:32:04 +0000 (+0100)
Subject: cheat in trunch_rem, truncate result of multiply
X-Git-Tag: 24jan2021_ls180~40
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3853df675a1e1db24950945f66b076266a7da409;p=nmutil.git

cheat in trunch_rem, truncate result of multiply
---

diff --git a/src/nmutil/divmod.py b/src/nmutil/divmod.py
index 0f1a549..488e225 100644
--- a/src/nmutil/divmod.py
+++ b/src/nmutil/divmod.py
@@ -15,6 +15,8 @@ def trunc_div(n, d):
 # this is a POWER ISA 3.0B compatible mod / remainder function
 # however it is also the c, c++, rust, java *and* x86 way of doing things
 def trunc_rem(n, d):
-    return n - d * trunc_div(n, d)
+    m = d * trunc_div(n, d)
+    m.bits = n.bits # cheat - really shouldn't do this. mul returns full length
+    return n - m