From: Dmitry Selyutin <dmitry.selyutin@3mdeb.com>
Date: Tue, 24 Aug 2021 11:59:10 +0000 (+0000)
Subject: fixedarith: switch divdeuX to XLEN
X-Git-Tag: xlen-bcd~69
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=eb6a68c07b57db29ea664f9d79ead7f0bf6a10a6;p=openpower-isa.git

fixedarith: switch divdeuX to XLEN
---

diff --git a/openpower/isa/fixedarith.mdwn b/openpower/isa/fixedarith.mdwn
index 663fa176..736e580a 100644
--- a/openpower/isa/fixedarith.mdwn
+++ b/openpower/isa/fixedarith.mdwn
@@ -753,19 +753,19 @@ XO-Form
 
 Pseudo-code:
 
-    dividend[0:127] <- (RA) || [0]*64
-    divisor[0:127] <- [0]*64 || (RB)
-    if divisor = [0]*128 then
+    dividend[0:(XLEN*2)-1] <- (RA) || [0]*XLEN
+    divisor[0:(XLEN*2)-1] <- [0]*XLEN || (RB)
+    if divisor = [0]*(XLEN*2) then
         overflow <- 1
     else
         result <- dividend / divisor
         if (RA) <u (RB) then
-            RT <- result[64:127]
+            RT <- result[XLEN:(XLEN*2)-1]
             overflow <- 0
         else
             overflow <- 1
     if overflow = 1 then
-        RT[0:63] <- undefined([0]*64)
+        RT[0:XLEN-1] <- undefined([0]*XLEN)
 
 Special Registers Altered: