From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 26 Aug 2022 14:18:32 +0000 (+0100)
Subject: put back overflow in setvl, TODO actually set an overflow variable
X-Git-Tag: sv_maxu_works-initial~82
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=52f2a056e7a0a92b88876268bcfb14795fafeeed;p=openpower-isa.git

put back overflow in setvl, TODO actually set an overflow variable
---

diff --git a/openpower/isa/simplev.mdwn b/openpower/isa/simplev.mdwn
index b78063dd..6169c2e3 100644
--- a/openpower/isa/simplev.mdwn
+++ b/openpower/isa/simplev.mdwn
@@ -37,6 +37,9 @@ Pseudo-code:
         else           MVL <- SVSTATE[0:6]
         # set or get VL
         if vs = 0                then VL <- SVSTATE[7:13]
+        else if _RA != 0         then
+            if (RA) >u 0b1111111 then VL <- 0b1111111
+            else                      VL <- (RA)[57:63]
         else if _RA != 0         then VL <- (RA)[57:63]
         else if _RT = 0          then VL <- VLimm[0:6]
         else if CTR >u 0b1111111 then VL <- 0b1111111