From: lkcl <lkcl@web>
Date: Sat, 8 Apr 2023 12:23:07 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls012_v1~71
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9d3a2913b16e8c9846e2d62b6c3210cc8e065b82;p=libreriscv.git

---

diff --git a/openpower/sv/rfc/ls012.mdwn b/openpower/sv/rfc/ls012.mdwn
index 66fc14a4e..8d0fb34f6 100644
--- a/openpower/sv/rfc/ls012.mdwn
+++ b/openpower/sv/rfc/ls012.mdwn
@@ -74,6 +74,20 @@ to this RFC.
 
 # Target Area summaries
 
+## SVP64 Management instructions
+
+These without question have to go in EXT0xx.  Future extended variants, bringing
+even more powerful capabilities, can be followed up later with EXT1xx prefixed
+variants.  Examples include adding psvshape in order to support both Inner and
+Outer Product Matrix Schedules, by providing the option to directly reverse the
+order of the triple loops.  Outer is used for standard Matrix Multiply, but Inner
+is required for Warshall Transitive Closure.
+
+The Management Instructions themselves are all Scalar Operations, so PO1-Prefixing
+is perfecly reasonable.  SVP64 Management instructions of which there are only
+6 are all 5 or 6 bit XO, meaning that the opcode space they take up in EXT0xx is
+not alarmingly high for their intrinsic strategic value.
+
 ## Transcendentals
 
 Found at [[openpower/transcendentals]] these subdivide into high priority for