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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
<!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/advent2020/3b.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/advent2020/3b.mu'>https://github.com/akkartik/mu/blob/main/linux/advent2020/3b.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># <a href="https://adventofcode.com/2020/day/3">https://adventofcode.com/2020/day/3</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 advent2020/3a.mu</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># $ ./a.elf < input</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
<span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
<span id="L10" class="LineNr"> 10 </span>
<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L11'>main</a></span><span class="PreProc"> -> </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
<span id="L12" class="LineNr"> 12 </span> <span class="muComment"># represent trees in a 2D array of ints</span>
<span id="L13" class="LineNr"> 13 </span> <span class="muComment"># wasteful since each tree is just one bit</span>
<span id="L14" class="LineNr"> 14 </span> <span class="PreProc">var</span> trees-storage: (array int <span class="Constant">0x2800</span>) <span class="muComment"># 10k ints</span>
<span id="L15" class="LineNr"> 15 </span> <span class="PreProc">var</span> trees/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special"><-</span> address trees-storage
<span id="L16" class="LineNr"> 16 </span> <span class="PreProc">var</span> trees-length/<span class="muRegEcx">ecx</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L17" class="LineNr"> 17 </span> <span class="PreProc">var</span> num-rows: int
<span id="L18" class="LineNr"> 18 </span> <span class="PreProc">var</span> width: int
<span id="L19" class="LineNr"> 19 </span> <span class="muComment"># phase 1: parse each row of trees from stdin</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">0x40</span>) <span class="muComment"># 64 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"><-</span> address line-storage
<span id="L23" class="LineNr"> 23 </span> <span class="Delimiter">{</span>
<span id="L24" class="LineNr"> 24 </span> <span class="muComment"># read line from stdin</span>
<span id="L25" class="LineNr"> 25 </span> <a href='../106stream.subx.html#L17'>clear-stream</a> line
<span id="L26" class="LineNr"> 26 </span> <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
<span id="L27" class="LineNr"> 27 </span> <span class="muComment"># if line is empty (not even a newline), quit</span>
<span id="L28" class="LineNr"> 28 </span> <span class="PreProc">var</span> done?/eax: boolean <span class="Special"><-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
<span id="L29" class="LineNr"> 29 </span> compare done?, <span class="Constant">0</span>/false
<span id="L30" class="LineNr"> 30 </span> <span class="PreProc">break-if-!=</span>
<span id="L31" class="LineNr"> 31 </span> <span class="muComment"># wastefully recompute width on every line</span>
<span id="L32" class="LineNr"> 32 </span> <span class="muComment"># zero error-checking; we assume input lines are all equally long</span>
<span id="L33" class="LineNr"> 33 </span> copy-to width, <span class="Constant">0</span>
<span id="L34" class="LineNr"> 34 </span> <span class="muComment"># turn each byte into a tree and append it</span>
<span id="L35" class="LineNr"> 35 </span> $main:line-loop: <span class="Delimiter">{</span>
<span id="L36" class="LineNr"> 36 </span> <span class="PreProc">var</span> done?/eax: boolean <span class="Special"><-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
<span id="L37" class="LineNr"> 37 </span> compare done?, <span class="Constant">0</span>/false
<span id="L38" class="LineNr"> 38 </span> <span class="PreProc">break-if-!=</span>
<span id="L39" class="LineNr"> 39 </span><span class="CommentedCode">#? print-int32-decimal 0, num-rows</span>
<span id="L40" class="LineNr"> 40 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L41" class="LineNr"> 41 </span><span class="CommentedCode">#? print-int32-decimal 0, width</span>
<span id="L42" class="LineNr"> 42 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L43" class="LineNr"> 43 </span> <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special"><-</span> index trees, trees-length
<span id="L44" class="LineNr"> 44 </span> <span class="PreProc">var</span> c/eax: byte <span class="Special"><-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
<span id="L45" class="LineNr"> 45 </span> <span class="muComment"># newline comes only at end of line</span>
<span id="L46" class="LineNr"> 46 </span> compare c, <span class="Constant">0xa</span>/newline
<span id="L47" class="LineNr"> 47 </span> <span class="PreProc">break-if-=</span>
<span id="L48" class="LineNr"> 48 </span> <span class="muComment"># '#' = tree</span>
<span id="L49" class="LineNr"> 49 </span> compare c, <span class="Constant">0x23</span>/hash
<span id="L50" class="LineNr"> 50 </span> <span class="Delimiter">{</span>
<span id="L51" class="LineNr"> 51 </span> <span class="PreProc">break-if-!=</span>
<span id="L52" class="LineNr"> 52 </span> copy-to *dest, <span class="Constant">1</span>
<span id="L53" class="LineNr"> 53 </span> <span class="Delimiter">}</span>
<span id="L54" class="LineNr"> 54 </span> <span class="muComment"># anything else = no tree</span>
<span id="L55" class="LineNr"> 55 </span> <span class="Delimiter">{</span>
<span id="L56" class="LineNr"> 56 </span> <span class="PreProc">break-if-=</span>
<span id="L57" class="LineNr"> 57 </span> copy-to *dest, <span class="Constant">0</span>
<span id="L58" class="LineNr"> 58 </span> <span class="Delimiter">}</span>
<span id="L59" class="LineNr"> 59 </span> increment width
<span id="L60" class="LineNr"> 60 </span> trees-length <span class="Special"><-</span> increment
<span id="L61" class="LineNr"> 61 </span> <span class="PreProc">loop</span>
<span id="L62" class="LineNr"> 62 </span> <span class="Delimiter">}</span>
<span id="L63" class="LineNr"> 63 </span> increment num-rows
<span id="L64" class="LineNr"> 64 </span> <span class="PreProc">loop</span>
<span id="L65" class="LineNr"> 65 </span> <span class="Delimiter">}</span>
<span id="L66" class="LineNr"> 66 </span> <span class="Delimiter">}</span>
<span id="L67" class="LineNr"> 67 </span> <span class="muComment"># phase 2: compute</span>
<span id="L68" class="LineNr"> 68 </span> <span class="PreProc">var</span> product/<span class="muRegEdi">edi</span>: int <span class="Special"><-</span> copy <span class="Constant">1</span>
<span id="L69" class="LineNr"> 69 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">1</span>
<span id="L70" class="LineNr"> 70 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
<span id="L71" class="LineNr"> 71 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" x "</span>
<span id="L72" class="LineNr"> 72 </span> product <span class="Special"><-</span> multiply result
<span id="L73" class="LineNr"> 73 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">3</span>, <span class="Constant">1</span>
<span id="L74" class="LineNr"> 74 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
<span id="L75" class="LineNr"> 75 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" x "</span>
<span id="L76" class="LineNr"> 76 </span> product <span class="Special"><-</span> multiply result
<span id="L77" class="LineNr"> 77 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">5</span>, <span class="Constant">1</span>
<span id="L78" class="LineNr"> 78 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
<span id="L79" class="LineNr"> 79 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" x "</span>
<span id="L80" class="LineNr"> 80 </span> product <span class="Special"><-</span> multiply result
<span id="L81" class="LineNr"> 81 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">7</span>, <span class="Constant">1</span>
<span id="L82" class="LineNr"> 82 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
<span id="L83" class="LineNr"> 83 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" x "</span>
<span id="L84" class="LineNr"> 84 </span> product <span class="Special"><-</span> multiply result
<span id="L85" class="LineNr"> 85 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">2</span>
<span id="L86" class="LineNr"> 86 </span> <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
<span id="L87" class="LineNr"> 87 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" = "</span>
<span id="L88" class="LineNr"> 88 </span> product <span class="Special"><-</span> multiply result
<span id="L89" class="LineNr"> 89 </span> <a href='../405screen.mu.html#L440'>print-int32-hex</a> <span class="Constant">0</span>, product
<span id="L90" class="LineNr"> 90 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"\n"</span>
<span id="L91" class="LineNr"> 91 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L92" class="LineNr"> 92 </span><span class="Delimiter">}</span>
<span id="L93" class="LineNr"> 93 </span>
<span id="L94" class="LineNr"> 94 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L94'>num-trees-hit</a></span> trees: (addr array int), width: int, num-rows: int, right: int, down: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L95" class="LineNr"> 95 </span><span class="CommentedCode">#? print-string 0, "== "</span>
<span id="L96" class="LineNr"> 96 </span><span class="CommentedCode">#? print-int32-decimal 0, right</span>
<span id="L97" class="LineNr"> 97 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L98" class="LineNr"> 98 </span><span class="CommentedCode">#? print-int32-decimal 0, down</span>
<span id="L99" class="LineNr"> 99 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L100" class="LineNr">100 </span> <span class="PreProc">var</span> row/<span class="muRegEcx">ecx</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L101" class="LineNr">101 </span> <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L102" class="LineNr">102 </span> <span class="PreProc">var</span> <a href='3b.mu.html#L94'>num-trees-hit</a>/<span class="muRegEdi">edi</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L103" class="LineNr">103 </span> <span class="Delimiter">{</span>
<span id="L104" class="LineNr">104 </span> compare row, num-rows
<span id="L105" class="LineNr">105 </span> <span class="PreProc">break-if->=</span>
<span id="L106" class="LineNr">106 </span><span class="CommentedCode">#? print-int32-decimal 0, col</span>
<span id="L107" class="LineNr">107 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L108" class="LineNr">108 </span> <span class="PreProc">var</span> curr/eax: int <span class="Special"><-</span> <a href='3b.mu.html#L121'>index2d</a> trees, row, col, width
<span id="L109" class="LineNr">109 </span> compare curr, <span class="Constant">0</span>
<span id="L110" class="LineNr">110 </span> <span class="Delimiter">{</span>
<span id="L111" class="LineNr">111 </span> <span class="PreProc">break-if-=</span>
<span id="L112" class="LineNr">112 </span> <a href='3b.mu.html#L94'>num-trees-hit</a> <span class="Special"><-</span> increment
<span id="L113" class="LineNr">113 </span> <span class="Delimiter">}</span>
<span id="L114" class="LineNr">114 </span> col <span class="Special"><-</span> add right
<span id="L115" class="LineNr">115 </span> row <span class="Special"><-</span> add down
<span id="L116" class="LineNr">116 </span> <span class="PreProc">loop</span>
<span id="L117" class="LineNr">117 </span> <span class="Delimiter">}</span>
<span id="L118" class="LineNr">118 </span> <span class="PreProc">return</span> <a href='3b.mu.html#L94'>num-trees-hit</a>
<span id="L119" class="LineNr">119 </span><span class="Delimiter">}</span>
<span id="L120" class="LineNr">120 </span>
<span id="L121" class="LineNr">121 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L121'>index2d</a></span> _arr: (addr array int), _row: int, _col: int, width: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L122" class="LineNr">122 </span> <span class="muComment"># handle repeating columns of trees</span>
<span id="L123" class="LineNr">123 </span> <span class="PreProc">var</span> dummy/eax: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L124" class="LineNr">124 </span> <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
<span id="L125" class="LineNr">125 </span> dummy, col <span class="Special"><-</span> <a href='../314divide.subx.html#L3'>integer-divide</a> _col, width
<span id="L126" class="LineNr">126 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L127" class="LineNr">127 </span><span class="CommentedCode">#? print-int32-decimal 0, col</span>
<span id="L128" class="LineNr">128 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L129" class="LineNr">129 </span> <span class="muComment"># compute index</span>
<span id="L130" class="LineNr">130 </span> <span class="PreProc">var</span> index/eax: int <span class="Special"><-</span> copy _row
<span id="L131" class="LineNr">131 </span> index <span class="Special"><-</span> multiply width
<span id="L132" class="LineNr">132 </span> index <span class="Special"><-</span> add col
<span id="L133" class="LineNr">133 </span> <span class="muComment"># look up array</span>
<span id="L134" class="LineNr">134 </span> <span class="PreProc">var</span> arr/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special"><-</span> copy _arr
<span id="L135" class="LineNr">135 </span> <span class="PreProc">var</span> src/eax: (addr int) <span class="Special"><-</span> index arr, index
<span id="L136" class="LineNr">136 </span> <span class="PreProc">return</span> *src
<span id="L137" class="LineNr">137 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|