From: Jacob Lifshay <programmerjake@gmail.com>
Date: Fri, 21 Apr 2023 03:13:57 +0000 (-0700)
Subject: add EXTZ since it's in PowerISA v3.1B (see lbz for an example)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=679408fbd0d5c12c5cb71dfcc3f860574c2c0172;p=openpower-isa.git

add EXTZ since it's in PowerISA v3.1B (see lbz for an example)
---

diff --git a/src/openpower/decoder/helpers.py b/src/openpower/decoder/helpers.py
index c009431d..76dad8a2 100644
--- a/src/openpower/decoder/helpers.py
+++ b/src/openpower/decoder/helpers.py
@@ -46,6 +46,14 @@ def EXTS(value):
     return SelectableInt(exts(value.value, value.bits) & ((1 << 256)-1), 256)
 
 
+def EXTZ(value):
+    """ zero extend to 256 bits
+    """
+    if isinstance(value, SelectableInt):
+        value = value.value
+    return SelectableInt(value & ((1 << 256) - 1), 256)
+
+
 def EXTS64(value):
     """ extends sign bit out from current MSB to 64 bits
     """