From: lkcl <lkcl@web>
Date: Thu, 8 Sep 2022 15:00:12 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~620
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=31826f7ce22019bb8b3ecfdc3ab104b3799ec9e3;p=libreriscv.git

---

diff --git a/openpower/sv/rfc/ls001.mdwn b/openpower/sv/rfc/ls001.mdwn
index 563b57e85..d6b82ea93 100644
--- a/openpower/sv/rfc/ls001.mdwn
+++ b/openpower/sv/rfc/ls001.mdwn
@@ -56,9 +56,9 @@ to not overburden implementors with features that they do not need.
 *There is no dependence between the two types of Compliancy Levels*
 
 The resources below therefore are not all required for all SV Compliancy Levels but
-they are all required
+they are all required to be reserved.
 
-# Simple-V Resources
+# Simple-V Architectural Resources
 
 * No new Interrupt types are required.
 * GPR FPR and CR Field Register numbers are extended to 128.
@@ -74,7 +74,15 @@ they are all required
 * To hold all Vector Context, five SPRs are needed for userspace (MSR.PR=1 Problem State).
   If Supervisor and Hypervisor mode are to also support Simple-V they will correspondingly
   need five SPRs each.
-* Six 5/6-bit XO "Management" instructions are needed.
+* Six 5/6-bit XO (A-Form) "Management" instructions are needed.
+
+**Summary of Opcode space**
+
+* 75% of one Major Opcode (equivalent to the rest of EXT017)
+* Six 5/6-bit operations.
+
+No further opcode space *for Simple-V* is envisaged to be required for at least
+the next decade.
 
 **SPRs**
 
@@ -86,6 +94,10 @@ they are all required
   with SVLR by SV-Branch-Conditional for exactly the same reason that NIA is swapped
   with LR
 
+* Management Instructions
+
+**setvl** 
+
 # SVP64 24-bit Prefix
 
 The SVP64 24-bit Prefix provides several options