From 665cc6eeefba852e9f4711d219bee1d9ef03d0cd Mon Sep 17 00:00:00 2001
From: Shriya Sharma <shriya@redsemiconductor.com>
Date: Tue, 3 Oct 2023 12:03:18 +0100
Subject: [PATCH] Added English Language description for stbup instruction

---
 openpower/isa/pifixedstore.mdwn | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/openpower/isa/pifixedstore.mdwn b/openpower/isa/pifixedstore.mdwn
index 1fe36aa6..d3c2cf5f 100644
--- a/openpower/isa/pifixedstore.mdwn
+++ b/openpower/isa/pifixedstore.mdwn
@@ -16,6 +16,16 @@ Pseudo-code:
     MEM(ea, 1) <- (RS)[XLEN-8:XLEN-1]
     RA <- EA
 
+Description:
+
+    Let the effective address (EA) be the sum (RA)+ D.
+    (RS)[56:63] are stored into the byte in storage addressed
+    by EA. 
+
+    EA is placed into register RA.
+
+    If RA=0, the instruction form is invalid.
+
 Special Registers Altered:
 
     None
-- 
2.30.2