>From 2b779ea16b0185b121063faa0ca534a75d67fc8d Mon Sep 17 00:00:00 2001
From: Akira Yokosawa <akiyks@xxxxxxxxx>
Date: Sun, 16 Apr 2017 16:14:24 +0900
Subject: [PATCH 13/14] advsync: Use pseudo asm in sequence in 'Data Dependency Barriers'
Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
---
advsync/memorybarriers.tex | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
diff --git a/advsync/memorybarriers.tex b/advsync/memorybarriers.tex
index 2b36214..9b878f3 100644
--- a/advsync/memorybarriers.tex
+++ b/advsync/memorybarriers.tex
@@ -1622,8 +1622,8 @@ Section~\ref{sec:advsync:Device Operations}).
\begin{minipage}[t]{\columnwidth}
\small
\begin{verbatim}
- a = 1;
- b = 1;
+ STORE a = 1
+ STORE b = 1
<write barrier>
\end{verbatim}
\end{minipage}
@@ -1673,7 +1673,8 @@ of the confines of a given architecture:
The usage requirements of data dependency barriers are a little subtle, and
it's not always obvious that they're needed. To illustrate, consider the
-following sequence of events, with initial values
+following sequence of events (in pseudo asm), with initial values of shared
+variables
{\tt \{A~=~1, B~=~2, C~=~3, P~=~\&A, Q~=~\&C\}}:
\vspace{5pt}
@@ -1681,13 +1682,13 @@ following sequence of events, with initial values
\tt
\scriptsize
\begin{tabular}{l|l}
- \nf{CPU 1} & \nf{CPU 2} \\
+ \nf{CPU 1} & \nf{CPU 2} \\
\hline
- B = 4; & \\
- <write barrier> & \\
- P = \&B; & \\
- & Q = P; \\
- & D = *Q; \\
+ STORE B = 4 & \\
+ <write barrier> & \\
+ STORE P = \&B & \\
+ & Q = LOAD P \\
+ & D = LOAD *Q \\
\end{tabular}
\end{minipage}
\vspace{5pt}
@@ -1734,14 +1735,14 @@ address load and the data load (again with initial values of
\tt
\scriptsize
\begin{tabular}{l|p{1.5in}}
- \nf{CPU 1} & \nf{CPU 2} \\
+ \nf{CPU 1} & \nf{CPU 2} \\
\hline
- B = 4; & \\
- <write barrier> & \\
- P = \&B; & \\
- & Q = P; \\
- & <data dependency barrier> \\
- & D = *Q; \\
+ STORE B = 4 & \\
+ <write barrier> & \\
+ STORE P = \&B & \\
+ & Q = LOAD P \\
+ & <data dependency barrier> \\
+ & D = LOAD *Q \\
\end{tabular}
\end{minipage}
\vspace{5pt}
--
2.7.4
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