From: Jacob Lifshay <programmerjake@gmail.com>
Date: Fri, 19 Jan 2024 07:54:00 +0000 (-0800)
Subject: fosdem2024_bigint.tex: add bigint add frame
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3df7339360d72aca61399aad31b6bdaa33db9230;p=libreriscv.git

fosdem2024_bigint.tex: add bigint add frame
---

diff --git a/conferences/fosdem2024/fosdem2024_bigint/fosdem2024_bigint.tex b/conferences/fosdem2024/fosdem2024_bigint/fosdem2024_bigint.tex
index a484c63e1..8e51dbb11 100644
--- a/conferences/fosdem2024/fosdem2024_bigint/fosdem2024_bigint.tex
+++ b/conferences/fosdem2024/fosdem2024_bigint/fosdem2024_bigint.tex
@@ -43,6 +43,24 @@ add r5, r17, r12
     \end{itemize}
 \end{frame}
 
+\begin{frame}[fragile]
+    \frametitle{Big-Integer Addition on SVP64}
+    How can we use SVP64 to add 192-bit integers?
+    \pause
+    \begin{semiverbatim}
+setvl 0, 0, 4, 0, 1, 1 # makes stuff run 4 times
+addic 0, 0, 0  # clear CA (carry flag)
+sv.adde *r4, *r4, *r8  # carry-propagating add
+\pause
+# expands to:
+addic 0, 0, 0  # clear CA (carry flag)
+adde r4, r4, r8
+adde r5, r5, r9
+adde r6, r6, r10
+adde r6, r6, r11
+    \end{semiverbatim}
+\end{frame}
+
 \begin{frame}
     \input{test.dia-tex}
 \end{frame}