notes(cs): adds RISC

Author: ShingZhanho

.github/workflows/compile.yml

@@ -46,7 +46,7 @@ jobs:
         id: check-hash
         run: |
           chmod +x ./build/download-hash.sh
-          ./build/download-hash.sh ${${{ env.ROOT_FILE }}/.tex/.pdf} ${{ env.SOURCE_HASH }}
+          ./build/download-hash.sh ${${{ env.ROOT_FILE }}/.tex/.pdf.hash} ${{ env.SOURCE_HASH }}
       ## Install MiKTeX
       - name: Install MiKTeX and dependencies
         id: apt-install

cheatsheet/instruction-sets.tex

@@ -104,4 +104,14 @@ \subsubsection*{Branch Prediction}
 \emph{Dynamic}: Use history to help predict. \begin{enuminline}
     \item \textbf{1-bit}: If wrong prediction, predict opposite; Problem: high misprediction rate at the end of loops;
     \item \textbf{2-bit}: If two consecutive wrong predictions, predict opposite.
+\end{enuminline}
+
+\subsubsection*{RISC Architecture}
+\emph{Characteristics}: \begin{enuminline}
+    \item Load/store architecture: only load/store instructions access memory;
+    \item Fixed-length, simple, fixed-format instructions $\Rightarrow$ high clock rate, low clock cycle time;
+    \item Fewer addressing modes $\Rightarrow$ low CPI;
+    \item More instructions (reduction in CPI is more significant than increase in instruction count);
+    \item Extensive soft/hardware pipelining;
+    \item Relies on compiler optimisation.
 \end{enuminline}