Bug 1244: Added psedocode for DDFF

diff --git a/conferences/fosdem2024/fosdem2024_ddffirst/fosdem2024_ddffirst.tex b/conferences/fosdem2024/fosdem2024_ddffirst/fosdem2024_ddffirst.tex
index 9029ebc30e49c991acf8d0d856be34d77b6a4857..b40cd72ab95b7e049333232d9cc866688d843917 100644 (file)
--- a/conferences/fosdem2024/fosdem2024_ddffirst/fosdem2024_ddffirst.tex
+++ b/conferences/fosdem2024/fosdem2024_ddffirst/fosdem2024_ddffirst.tex
@@ -129,6 +129,25 @@ function op\_cmpi(BA, RA, SI) # cmpi not vector-cmpi!
   \end{itemize}
 \end{frame}
 
+
+
+\begin{frame}[fragile]
+\frametitle{Data-Dependent-Fail-First in a nutshell}
+
+\begin{semiverbatim}
+       while srcstep < VL - 1
+               RT[SS], Rc = DO (MAXS, RA[SS], RB)
+               if test (Rc) == FAIL: VL = srcstep + 1, break   
+       
+\end{semiverbatim}
+
+\begin{itemize}
+       \item Above is oversimplified: predication etc. left out
+       \item Scalar-scalar and scalar-vector and vector-vector now all in one
+       \item OoO may choose to push CMPIs into instr. queue (v. busy!)
+\end{itemize}
+\end{frame}
+
 \frame{\frametitle{Load/Store Fault-First}
        
        \begin{itemize}
@@ -140,24 +159,6 @@ function op\_cmpi(BA, RA, SI) # cmpi not vector-cmpi!
        \end{itemize}
 }
 
-\begin{frame}[fragile]
-       \frametitle{Data-Dependent Fail-First}
-       
-       \begin{semiverbatim}
-               function op\_cmpi(BA, RA, SI) # cmpi not vector-cmpi!
-               int i, id=0, ira=0;
-               for (i = 0; i < VL; i++)
-               CR[BA+id] <= compare(ireg[RA+ira], SI);
-               if (reg\_is\_vectorised[BA] ) \{ id += 1; \}
-               if (reg\_is\_vectorised[RA])  \{ ira += 1; \}
-       \end{semiverbatim}
-       
-       \begin{itemize}
-               \item Above is oversimplified: predication etc. left out
-               \item Scalar-scalar and scalar-vector and vector-vector now all in one
-               \item OoO may choose to push CMPIs into instr. queue (v. busy!)
-       \end{itemize}
-\end{frame}
 
 
 \frame{\frametitle{Additional Simple-V features}