From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 6 Jul 2020 15:55:56 +0000 (+0100)
Subject: add eq32 helper
X-Git-Tag: 24jan2021_ls180~43
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5ea10a90668022e31330ce5b98c2e710c374e032;p=nmutil.git

add eq32 helper
---

diff --git a/src/nmutil/util.py b/src/nmutil/util.py
index 3aec9f9..963dcb6 100644
--- a/src/nmutil/util.py
+++ b/src/nmutil/util.py
@@ -26,3 +26,10 @@ def treereduce(tree, op, fn):
     s = len(tree) // 2 # splitpoint
     return op(treereduce(tree[:s], op, fn),
               treereduce(tree[s:], op, fn))
+
+# chooses assignment of 32 bit or full 64 bit depending on is_32bit
+def eq32(is_32bit, dest, src):
+    return [dest[0:32].eq(src[0:32]),
+            dest[32:64].eq(Mux(is_32bit, 0, src[32:64]))]
+
+