From: Dmitry Selyutin <ghostmansd@gmail.com>
Date: Tue, 1 Nov 2022 19:16:52 +0000 (+0300)
Subject: bitmanip.mdwn: avoid overflow for m variable
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=50eb051ab3b916aab443ea3484a02b00e5a143d0;p=openpower-isa.git

bitmanip.mdwn: avoid overflow for m variable
---

diff --git a/openpower/isa/bitmanip.mdwn b/openpower/isa/bitmanip.mdwn
index 5d404488..9c12c69e 100644
--- a/openpower/isa/bitmanip.mdwn
+++ b/openpower/isa/bitmanip.mdwn
@@ -111,7 +111,7 @@ Z23-Form
 Pseudo-code:
 
     n <- (RB)
-    m <- sm + 1
+    m <- ((0b0 || sm) + 1)
     RT <- (n[m:XLEN-1] || [0]*m) + (RA)
 
 Special Registers Altered:
@@ -128,7 +128,7 @@ Z23-Form
 Pseudo-code:
 
     n <- ([0]*(XLEN/2)) || (RB)[XLEN/2:XLEN-1]
-    m <- sm + 1
+    m <- ((0b0 || sm) + 1)
     RT <- (n[m:XLEN-1] || [0]*m) + (RA)
 
 Special Registers Altered: