From: Andrey Miroshnikov <andrey@technepisteme.xyz>
Date: Wed, 15 Jun 2022 22:39:17 +0000 (+0100)
Subject: Initial svp64 doc structure with quick notes from meeting
X-Git-Tag: opf_rfc_ls005_v1~1763
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4f02d7668ab90b50e355bdb8b04153fe98b1b523;p=libreriscv.git

Initial svp64 doc structure with quick notes from meeting
---

diff --git a/svp64-primer/summary.tex b/svp64-primer/summary.tex
new file mode 100644
index 000000000..41824537f
--- /dev/null
+++ b/svp64-primer/summary.tex
@@ -0,0 +1,31 @@
+\section{Summary}
+Specification for hardware for-loop that ONLY uses scalar instructions
+
+
+Existing SIMD technologies are complex [examples], and 
+https://www.sigarch.org/simd-instructions-considered-harmful/
+(actually much worse)
+AVX512 example requires setup instructions (and data organisation), which means real code baloons. At the start/end need to deal with memory boundaries.
+
+
+
+SVP64, is a specification designed to rival existing SIMD implementations by:
+\begin{itemize}
+	\item Simplify hardware design
+	\item Reducing maintenance overhead
+	\item Simplify manual assembler hand optimisation
+	\item Easier for compilers, coders, documentation
+	\item Time to support platform is a fraction of conventional SIMD (Less money R\&D, faster to deliver)
+\end{itemize}
+
+- Intel SIMD is designed to be more capable and has more features, and thus has a greater complexity (?)
+
+
+- What are we going to gain?
+
+-for loop, increment registers RT, RA, RB
+-few instructions, easier to implement and maintain
+-example assembly code
+-ARM has already started to add to libC SVE2 support 
+
+1970 x86 comparison
\ No newline at end of file
diff --git a/svp64-primer/svp64-primer.tex b/svp64-primer/svp64-primer.tex
new file mode 100644
index 000000000..8a5fef1c1
--- /dev/null
+++ b/svp64-primer/svp64-primer.tex
@@ -0,0 +1,14 @@
+\documentclass[a4paper, 10pt]{article}
+\usepackage[utf8]{inputenc}
+
+\title{(DRAFT) SVP64 Primer}
+
+\author{Andrey Miroshnikov, ...}
+
+\begin{document}
+\maketitle
+
+\input{summary}
+%\input{...}
+
+\end{document}