From 45e739e1bdb44b6975c1826cbd0606667e4f73b7 Mon Sep 17 00:00:00 2001
From: Dmitry Selyutin <dmitry.selyutin@3mdeb.com>
Date: Sat, 2 Oct 2021 09:12:13 +0000
Subject: [PATCH] decoder/helpers: simplify XLCASTU

---
 src/openpower/decoder/helpers.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/openpower/decoder/helpers.py b/src/openpower/decoder/helpers.py
index a11081bc..be6ab496 100644
--- a/src/openpower/decoder/helpers.py
+++ b/src/openpower/decoder/helpers.py
@@ -454,8 +454,8 @@ class ISACallerHelper:
         return SelectableInt(exts(value.value, self.XLEN), self.XLEN)
 
     def XLCASTU(self, value):
-        bits = min(value.bits, self.XLEN)
-        return SelectableInt(value.value & ((1 << bits) - 1), self.XLEN)
+        # SelectableInt already takes care of masking out the bits
+        return SelectableInt(value.value, self.XLEN)
 
     def __getattr__(self, attr):
         try:
-- 
2.30.2