about summary refs log tree commit diff stats
path: root/html/linux/advent2020/1b.mu.html
blob: fad9e60d14e001f6883ed8e49f2b897f0a1327cf (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - linux/advent2020/1b.mu</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #ffffd7; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #ffffd7; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.muRegEdx { color: #af5f00; }
.Special { color: #ff6060; }
.LineNr { }
.muRegEsi { color: #005faf; }
.muRegEbx { color: #5f00ff; }
.Constant { color: #008787; }
.muRegEdi { color: #00af00; }
.muRegEcx { color: #870000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.CommentedCode { color: #8a8a8a; }
.muComment { color: #005faf; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  var lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/linux/advent2020/1b.mu'>https://github.com/akkartik/mu/blob/main/linux/advent2020/1b.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="muComment"># <a href="https://adventofcode.com/2020/day/1">https://adventofcode.com/2020/day/1</a></span>
<span id="L2" class="LineNr">  2 </span><span class="muComment">#</span>
<span id="L3" class="LineNr">  3 </span><span class="muComment"># To run (on Linux):</span>
<span id="L4" class="LineNr">  4 </span><span class="muComment">#   $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
<span id="L5" class="LineNr">  5 </span><span class="muComment">#   $ cd mu</span>
<span id="L6" class="LineNr">  6 </span><span class="muComment">#   $ ./translate advent2020/1b.mu</span>
<span id="L7" class="LineNr">  7 </span><span class="muComment">#   $ ./a.elf &lt; input</span>
<span id="L8" class="LineNr">  8 </span><span class="muComment">#   found</span>
<span id="L9" class="LineNr">  9 </span><span class="muComment">#   143 407 1470</span>
<span id="L10" class="LineNr"> 10 </span><span class="muComment">#   85555470</span>
<span id="L11" class="LineNr"> 11 </span><span class="muComment">#</span>
<span id="L12" class="LineNr"> 12 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
<span id="L13" class="LineNr"> 13 </span>
<span id="L14" class="LineNr"> 14 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1b.mu.html#L14'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
<span id="L15" class="LineNr"> 15 </span>  <span class="muComment"># data structure</span>
<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> numbers-storage: (array int <span class="Constant">0x100</span>)  <span class="muComment"># 256 ints</span>
<span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address numbers-storage
<span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> numbers-index/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L19" class="LineNr"> 19 </span>  <span class="muComment"># phase 1: parse each line from stdin and add it to numbers</span>
<span id="L20" class="LineNr"> 20 </span>  <span class="Delimiter">{</span>
<span id="L21" class="LineNr"> 21 </span>    <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
<span id="L23" class="LineNr"> 23 </span>    <span class="Delimiter">{</span>
<span id="L24" class="LineNr"> 24 </span><span class="CommentedCode">#?       print-string 0, &quot;== iter\n&quot;</span>
<span id="L25" class="LineNr"> 25 </span>      <span class="muComment"># read line from stdin</span>
<span id="L26" class="LineNr"> 26 </span>      <a href='../106stream.subx.html#L17'>clear-stream</a> line
<span id="L27" class="LineNr"> 27 </span>      <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
<span id="L28" class="LineNr"> 28 </span>      <span class="muComment"># if line is empty (not even a newline), quit</span>
<span id="L29" class="LineNr"> 29 </span>      <span class="PreProc">var</span> done?/eax: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
<span id="L30" class="LineNr"> 30 </span>      compare done?, <span class="Constant">0</span>/false
<span id="L31" class="LineNr"> 31 </span>      <span class="PreProc">break-if-!=</span>
<span id="L32" class="LineNr"> 32 </span><span class="CommentedCode">#?       print-stream-to-real-screen line</span>
<span id="L33" class="LineNr"> 33 </span>      <span class="muComment"># convert line to int and append it to numbers</span>
<span id="L34" class="LineNr"> 34 </span>      <span class="PreProc">var</span> n/eax: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L48'>parse-decimal-int-from-stream</a> line
<span id="L35" class="LineNr"> 35 </span><span class="CommentedCode">#?       print-int32-decimal 0, n</span>
<span id="L36" class="LineNr"> 36 </span><span class="CommentedCode">#?       print-string 0, &quot;\n&quot;</span>
<span id="L37" class="LineNr"> 37 </span>      <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, numbers-index
<span id="L38" class="LineNr"> 38 </span>      copy-to *dest, n
<span id="L39" class="LineNr"> 39 </span>      numbers-index <span class="Special">&lt;-</span> increment
<span id="L40" class="LineNr"> 40 </span><span class="CommentedCode">#?       print-string 0, &quot;== &quot;</span>
<span id="L41" class="LineNr"> 41 </span><span class="CommentedCode">#?       print-int32-decimal 0, numbers-index</span>
<span id="L42" class="LineNr"> 42 </span><span class="CommentedCode">#?       print-string 0, &quot;\n&quot;</span>
<span id="L43" class="LineNr"> 43 </span>      <span class="PreProc">loop</span>
<span id="L44" class="LineNr"> 44 </span>    <span class="Delimiter">}</span>
<span id="L45" class="LineNr"> 45 </span>  <span class="Delimiter">}</span>
<span id="L46" class="LineNr"> 46 </span>  <span class="muComment"># phase 2: for every pair of distinct numbers, check if the rest of the</span>
<span id="L47" class="LineNr"> 47 </span>  <span class="muComment"># array has 2020-it</span>
<span id="L48" class="LineNr"> 48 </span>  <span class="PreProc">var</span> i/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L49" class="LineNr"> 49 </span>  <span class="Delimiter">{</span>
<span id="L50" class="LineNr"> 50 </span>    compare i, numbers-index
<span id="L51" class="LineNr"> 51 </span>    <span class="PreProc">break-if-&gt;=</span>
<span id="L52" class="LineNr"> 52 </span>    <span class="muComment"># for j from i+1 to end</span>
<span id="L53" class="LineNr"> 53 </span>    <span class="PreProc">var</span> j/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy i
<span id="L54" class="LineNr"> 54 </span>    j <span class="Special">&lt;-</span> increment
<span id="L55" class="LineNr"> 55 </span>    <span class="Delimiter">{</span>
<span id="L56" class="LineNr"> 56 </span>      compare j, numbers-index
<span id="L57" class="LineNr"> 57 </span>      <span class="PreProc">break-if-&gt;=</span>
<span id="L58" class="LineNr"> 58 </span>      <span class="Delimiter">{</span>
<span id="L59" class="LineNr"> 59 </span>        compare i, j
<span id="L60" class="LineNr"> 60 </span>        <span class="PreProc">break-if-=</span>
<span id="L61" class="LineNr"> 61 </span>        <span class="PreProc">var</span> target/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
<span id="L62" class="LineNr"> 62 </span>        <span class="PreProc">var</span> src/<span class="muRegEdi">edi</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
<span id="L63" class="LineNr"> 63 </span>        target <span class="Special">&lt;-</span> subtract *src
<span id="L64" class="LineNr"> 64 </span>        <span class="PreProc">var</span> src2/<span class="muRegEcx">ecx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, j
<span id="L65" class="LineNr"> 65 </span>        target <span class="Special">&lt;-</span> subtract *src2
<span id="L66" class="LineNr"> 66 </span>        <span class="Delimiter">{</span>
<span id="L67" class="LineNr"> 67 </span>          <span class="PreProc">var</span> found?/eax: boolean <span class="Special">&lt;-</span> <a href='1b.mu.html#L93'>find-after</a> numbers, j, target
<span id="L68" class="LineNr"> 68 </span>          compare found?, <span class="Constant">0</span>/false
<span id="L69" class="LineNr"> 69 </span>          <span class="PreProc">break-if-=</span>
<span id="L70" class="LineNr"> 70 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;found\n&quot;</span>
<span id="L71" class="LineNr"> 71 </span>          <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, *src
<span id="L72" class="LineNr"> 72 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; &quot;</span>
<span id="L73" class="LineNr"> 73 </span>          <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, *src2
<span id="L74" class="LineNr"> 74 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; &quot;</span>
<span id="L75" class="LineNr"> 75 </span>          <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, target
<span id="L76" class="LineNr"> 76 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;\n&quot;</span>
<span id="L77" class="LineNr"> 77 </span>          target <span class="Special">&lt;-</span> multiply *src
<span id="L78" class="LineNr"> 78 </span>          target <span class="Special">&lt;-</span> multiply *src2
<span id="L79" class="LineNr"> 79 </span>          <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, target
<span id="L80" class="LineNr"> 80 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;\n&quot;</span>
<span id="L81" class="LineNr"> 81 </span>          <span class="PreProc">return</span> <span class="Constant">0</span>/success
<span id="L82" class="LineNr"> 82 </span>        <span class="Delimiter">}</span>
<span id="L83" class="LineNr"> 83 </span>      <span class="Delimiter">}</span>
<span id="L84" class="LineNr"> 84 </span>      j <span class="Special">&lt;-</span> increment
<span id="L85" class="LineNr"> 85 </span>      <span class="PreProc">loop</span>
<span id="L86" class="LineNr"> 86 </span>    <span class="Delimiter">}</span>
<span id="L87" class="LineNr"> 87 </span>    i <span class="Special">&lt;-</span> increment
<span id="L88" class="LineNr"> 88 </span>    <span class="PreProc">loop</span>
<span id="L89" class="LineNr"> 89 </span>  <span class="Delimiter">}</span>
<span id="L90" class="LineNr"> 90 </span>  <span class="PreProc">return</span> <span class="Constant">1</span>/not-found
<span id="L91" class="LineNr"> 91 </span><span class="Delimiter">}</span>
<span id="L92" class="LineNr"> 92 </span>
<span id="L93" class="LineNr"> 93 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1b.mu.html#L93'>find-after</a></span> _numbers: (addr array int), start: int, _target: int<span class="PreProc"> -&gt; </span>_/eax: boolean <span class="Delimiter">{</span>
<span id="L94" class="LineNr"> 94 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _numbers
<span id="L95" class="LineNr"> 95 </span>  <span class="PreProc">var</span> target/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy _target
<span id="L96" class="LineNr"> 96 </span>  <span class="PreProc">var</span> len/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> length numbers
<span id="L97" class="LineNr"> 97 </span>  <span class="PreProc">var</span> i/eax: int <span class="Special">&lt;-</span> copy start
<span id="L98" class="LineNr"> 98 </span>  i <span class="Special">&lt;-</span> increment
<span id="L99" class="LineNr"> 99 </span>  <span class="Delimiter">{</span>
<span id="L100" class="LineNr">100 </span>    compare i, len
<span id="L101" class="LineNr">101 </span>    <span class="PreProc">break-if-&gt;=</span>
<span id="L102" class="LineNr">102 </span>    <span class="PreProc">var</span> src/<span class="muRegEdx">edx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
<span id="L103" class="LineNr">103 </span>    <span class="muComment"># if *src == target, return true</span>
<span id="L104" class="LineNr">104 </span>    compare *src, target
<span id="L105" class="LineNr">105 </span>    <span class="Delimiter">{</span>
<span id="L106" class="LineNr">106 </span>      <span class="PreProc">break-if-!=</span>
<span id="L107" class="LineNr">107 </span>      <span class="PreProc">return</span> <span class="Constant">1</span>/true
<span id="L108" class="LineNr">108 </span>    <span class="Delimiter">}</span>
<span id="L109" class="LineNr">109 </span>    i <span class="Special">&lt;-</span> increment
<span id="L110" class="LineNr">110 </span>    <span class="PreProc">loop</span>
<span id="L111" class="LineNr">111 </span>  <span class="Delimiter">}</span>
<span id="L112" class="LineNr">112 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>/false
<span id="L113" class="LineNr">113 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->