From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 26 Oct 2021 11:13:46 +0000 (+0100)
Subject: add DCT slide
X-Git-Tag: opf_rfc_ls005_v1~3524
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=be3bdb1f6895c210848061f2db5dcf9d85940a9b;p=libreriscv.git

add DCT slide
---

diff --git a/conferences/openpower2021/openpower_2021.tex b/conferences/openpower2021/openpower_2021.tex
index f76c1c27d..71d844309 100644
--- a/conferences/openpower2021/openpower_2021.tex
+++ b/conferences/openpower2021/openpower_2021.tex
@@ -70,14 +70,6 @@
 
 
 
-%%\frame{\frametitle{nmigen PowerISA Decoder}
-
-%%\begin{center}
-%%\includegraphics[width=0.55\textwidth]{2020-09-09_21-04.png}
-%%\end{center}
-
-%%}
-
 \begin{frame}[fragile]
 \frametitle{Reminder of Simple-V}
 
@@ -250,6 +242,23 @@ sv.fmadds: uses fp0 as accumulator
   \end{itemize}
 }
 
+\frame{\frametitle{nmigen PowerISA Decoder}
+
+ \begin{itemize}
+   \item Standard DCT Schedule (messy, impossible for SIMD)
+   \item Output is in bit-reversed order\\
+         0b000 = 0b000 (in: 0   out: 0)\\
+         0b001 = 0b100 (in: 1   out: 4)\\
+         0b110 = 0b011 (in: 7   out: 3)
+         0b111 = 0b111 (in: 7   out: 7)
+  \end{itemize}
+
+\begin{center}
+\includegraphics[width=0.75\textwidth]{plonka_dct1.png}
+\end{center}
+
+}
+
 
 \frame{\frametitle{TODO rewrite Summary}
 
diff --git a/conferences/openpower2021/plonka_dct1.png b/conferences/openpower2021/plonka_dct1.png
index 6d41325fa..0a186c247 100644
Binary files a/conferences/openpower2021/plonka_dct1.png and b/conferences/openpower2021/plonka_dct1.png differ