From: Shriya Sharma <shriya@redsemiconductor.com>
Date: Thu, 19 Oct 2023 10:56:40 +0000 (+0100)
Subject: added stdbrsx instruction
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3693e3ca0a2e0001d9e3334862f62107a671ee4e;p=openpower-isa.git

added stdbrsx instruction
---

diff --git a/openpower/isa/fixedstoreshift.mdwn b/openpower/isa/fixedstoreshift.mdwn
index 35e10d1c..c70fc953 100644
--- a/openpower/isa/fixedstoreshift.mdwn
+++ b/openpower/isa/fixedstoreshift.mdwn
@@ -266,16 +266,16 @@ Special Registers Altered:
 
 <!-- Section 3.3.5.1 64-Bit Load and Store with Byte Reversal Instructions page 61 -->
 
-# Store Doubleword Byte-Reverse Indexed
+# Store Doubleword Byte-Reverse Shifted Indexed
 
 X-Form
 
-* stdbrx RS,RA,RB
+* stdbrsx RS,RA,RB,SH
 
 Pseudo-code:
 
     b <- (RA|0)
-    EA <- b + (RB)
+    EA <- b + (RB) << (SH+1)
     MEM(EA, 8) <- ((RS) [56:63] || (RS)[48:55]
                     || (RS)[40:47] || (RS)[32:39]
                     || (RS)[24:31] || (RS)[16:23]