From: Shriya Sharma <shriya@redsemiconductor.com>
Date: Thu, 19 Oct 2023 10:55:00 +0000 (+0100)
Subject: added stwbrsx instruction
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2bc98f87917e7d9527878d5d21b13a1aecc8b2dc;p=openpower-isa.git

added stwbrsx instruction
---

diff --git a/openpower/isa/fixedstoreshift.mdwn b/openpower/isa/fixedstoreshift.mdwn
index 37e74887..7e0c4636 100644
--- a/openpower/isa/fixedstoreshift.mdwn
+++ b/openpower/isa/fixedstoreshift.mdwn
@@ -237,16 +237,16 @@ Special Registers Altered:
 
     None
 
-# Store Word Byte-Reverse Indexed
+# Store Word Byte-Reverse Shifted Indexed
 
 X-Form
 
-* stwbrx RS,RA,RB
+* stwbrsx RS,RA,RB,SH
 
 Pseudo-code:
 
     b <- (RA|0)
-    EA <- b + (RB)
+    EA <- b + (RB) << (SH+1)
     MEM(EA, 4) <- ((RS)[56:63] || (RS)[48:55] || (RS)[40:47]
                    ||(RS)[32:39])