From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 16 Apr 2023 14:43:46 +0000 (+0100)
Subject: add ls009 Notes
X-Git-Tag: opf_rfc_ls009_v1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f385f35c363729e42da9a8a906d1aa1a9aeb4c9c;p=libreriscv.git

add ls009 Notes
---

diff --git a/openpower/sv/rfc/ls009.mdwn b/openpower/sv/rfc/ls009.mdwn
index 2ed47ae23..059b441d0 100644
--- a/openpower/sv/rfc/ls009.mdwn
+++ b/openpower/sv/rfc/ls009.mdwn
@@ -70,7 +70,19 @@ unprecedented general-purpose capability and a standard Sequential Execution Mod
 
 **Notes and Observations**:
 
-1. TODO
+1. Although costly the alternatives in SIMD-paradigm software result in
+   huge algorithmic complexity and associated power consumption increases.
+   Loop-unrolling compilers are prevalent as is thousands to tens of
+   thousands of instructions.
+2. Core inner kernels of Matrix DCT DFT FFT NTT are dramatically reduced
+   to a handful of instructions.
+3. No REMAP instructions with the exception of Indexed rely on registers
+   for the establishment of REMAP capability.
+4. Future EXT1xx variants and SVP64/VSX will dramatically expand the power
+   and flexibility of REMAP.
+5. The Simple-V Compliancy Subsets make REMAP optional except in the
+   Advanced Levels.  Like v3.1 MMA it is **not** necessary for **all**
+   hardware to implement REMAP.
 
 **Changes**