From: lkcl <lkcl@web>
Date: Mon, 10 Apr 2023 13:42:09 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls012_v1~28
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8d73b7fedcd5b4ef6d5d25a93e0dc39525e3b361;p=libreriscv.git

---

diff --git a/openpower/sv/rfc/ls012.mdwn b/openpower/sv/rfc/ls012.mdwn
index 475d4b3b2..aaf55281c 100644
--- a/openpower/sv/rfc/ls012.mdwn
+++ b/openpower/sv/rfc/ls012.mdwn
@@ -389,6 +389,24 @@ offset computation, thus they are best placed in EXT0xx.
 
 \newpage{}
 
+# Guidance for evaluation
+
+Deciding which instructions go into an ISA is extremely complex, costly, and a huge
+responsibility. In public standards mistakes are irrevocable, and in the case of an ISA
+the Opcode Allocation is a finite resource, meaning that mistakes punish future instructions
+as well.  This section therefore provides some Evaluation Guidance on the decision process.
+
+**Does anyone want it?**
+
+Sounds like an obvious question but if there is no driving need (no "Stakeholder")
+then why is the instruction being proposed? If it is purely out of curiosity or
+part of a Research effort not intended for production then it's probably best left in the
+EXT022 Sandbox.
+
+**How many registers does it need?**
+
+
+
 # Tables
 
 The original tables are available publicly as as CSV file at