From d596b67e48e7c85379e1283187687edc2fc19b8f Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Wed, 24 Mar 2021 16:45:09 +0100
Subject: Added assignments for dig

---
 render.py                 | 24 ++++++++++------
 sem6/dig/mpc2/opgaver.tex | 71 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 9 deletions(-)
 create mode 100644 sem6/dig/mpc2/opgaver.tex

diff --git a/render.py b/render.py
index 8ae4ed0..937ad42 100755
--- a/render.py
+++ b/render.py
@@ -11,14 +11,18 @@ tex_template = """\\documentclass[12pt]{article}
 \\usepackage{amsmath}
 \\usepackage{amsfonts}
 \\usepackage{mdframed}
+\\usepackage{float}
+
+\\usepackage{tikz}
+\\usetikzlibrary{automata, positioning, arrows}
 
 \\newtheorem{definition}{Definition}
 \\newtheorem{lemma}{Lemma}
 \\newtheorem{theorem}{Theorem}
 
-{% if p is not none %}
-\\title{ {{title}} }
-{% endif %}
+{% for thing in before %}
+{{thing}}
+{% endfor %}
 
 \\setlength{\parindent}{0cm}
 \\setlength{\parskip}{0.3em}
@@ -32,6 +36,8 @@ tex_template = """\\documentclass[12pt]{article}
 \\end{document}
 """
 
+beforewhitelist = ["title", "date"]
+
 parser = argparse.ArgumentParser()
 parser.add_argument("file", help="The file to load")
 
@@ -39,21 +45,21 @@ args = parser.parse_args()
 
 # Load the file
 content = []
-title = None
+before = []
 with open(args.file, "r") as f:
     for line in f:
-        m = re.findall("\\\\title\{(.*)\}", line)
-        if m:
-            title = m[0]
+        m = re.findall("\\\\([a-zA-Z]*)\{.*\}", line)
+        if m and m[0] in beforewhitelist:
+            before.append(line)
         else:
             content.append(line)
 
 content = "".join(content)
-print(content)
 
 # Write to output
 tmpl = jinja2.Template(tex_template)
-output = tmpl.render(title=title,content=content)
+output = tmpl.render(before=before,content=content)
+print(output)
 
 # Create build folder
 if not os.path.exists("render_build"):
diff --git a/sem6/dig/mpc2/opgaver.tex b/sem6/dig/mpc2/opgaver.tex
new file mode 100644
index 0000000..8e9a30d
--- /dev/null
+++ b/sem6/dig/mpc2/opgaver.tex
@@ -0,0 +1,71 @@
+\title{Opgaver til Microprocessors 2}
+\date{2021-03-24}
+
+\section{Problem 4.1}
+
+\emph{In Fig. 4-6, the B bus register is encoded in a 4-bit field, but the C bus is represented
+as a bit map. Why?}
+
+It is often wanted to save the result from the ALU in multiple destination registers.
+Therefore one cannot take the shortcut with a 4-bit field, as that would only allow one save at the time.
+
+One cannot present 1 and 2 at the same time in 4-bit field, as that would activate register 3.
+
+\section{Problem 4.5}
+
+{\itshape
+    Suppose that in the example of Fig. 4-14(a) the statement
+    \begin{verbatim}
+        k = 5;
+    \end{verbatim}
+    is added after the if statement. What would the new assembly code be? Assume that
+    the compiler is an optimizing compiler.
+}
+
+Well k is set either way, so one can invert the if.
+
+\begin{verbatim}
+    ILOAD j
+    ILOAD k
+    IADD
+    BIPUSH 3
+    IF_ICMPEQ L1
+    ILOAD j
+    BIPUSH 1
+    ISUB
+    ISTORE j
+    L1: BIPUSH 5
+    ISTORE k
+\end{verbatim}
+
+\section{Problem 4.9}
+
+{\itshape
+    How long does a 2.5-GHz Mic-1 take to execute the Java statement
+    \begin{verbatim}
+        i = j + k
+    \end{verbatim}
+    Give your answer in nanoseconds
+}
+
+First we "compile" the java statement :-).
+
+\begin{verbatim}
+    ILOAD j
+    ILOAD k
+    IADD
+    ISTORE i
+\end{verbatim}
+
+Then we can add how many microinstructions each takes (\textbf{bold} number) multiplied with how many times it is used.
+
+\begin{equation}
+    \underbrace{\mathbf 1 \cdot 4}_{MAIN} + \underbrace{\mathbf 5 \cdot 2}_{ILOAD} + \underbrace{\mathbf 3}_{IADD} + \underbrace{\mathbf 6 \cdot 2}_{ISTORE} = 29
+\end{equation}
+
+Then we can multiply with the nanoseconds a single instruction takes
+\begin{equation}
+    \frac 1 {2.5 \cdot 10^9} \cdot 29 = 11.6 \cdot 10^{-9}\,,
+\end{equation}
+which is 11.6 Nanoseconds.
+
-- 
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