From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 5 Jan 2022 14:14:29 +0000 (+0000)
Subject: use bit_length rather than log2_int function in mask.py
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7f1b0fd46ea0a35603d94b19ff9f94b58340e098;p=nmutil.git

use bit_length rather than log2_int function in mask.py
---

diff --git a/src/nmutil/mask.py b/src/nmutil/mask.py
index 4a04862..dc2f05d 100644
--- a/src/nmutil/mask.py
+++ b/src/nmutil/mask.py
@@ -17,14 +17,14 @@ def masked(m_out, m_in, mask):
 class Mask(Elaboratable):
     def __init__(self, sz):
         self.sz = sz
-        self.shift = Signal(log2_int(sz, False)+1)
+        self.shift = Signal(sz.bit_length()+1)
         self.mask = Signal(sz)
 
     def elaborate(self, platform):
         m = Module()
 
         for i in range(self.sz):
-            with m.If(self.shift > i):
+            with m.If(i < self.shift):
                 m.d.comb += self.mask[i].eq(1)
 
         return m