102 lines
5.6 KiB
HTML
102 lines
5.6 KiB
HTML
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<title>~/play/mu/linux/advent2017/1a.mu.html</title>
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<body>
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<pre id='vimCodeElement'>
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<span class="muComment"># Advent of code 2017, problem 1a</span>
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<span class="muComment"># <a href="https://adventofcode.com/2017/day/1">https://adventofcode.com/2017/day/1</a></span>
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<span class="muComment">#</span>
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<span class="muComment"># Mu solution by Sumeet Agarwal and Kartik Agaram</span>
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<span class="muComment"># <a href="https://github.com/akkartik/mu/blob/main/linux/advent2017/1a.mu">https://github.com/akkartik/mu/blob/main/linux/advent2017/1a.mu</a></span>
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<span class="muComment"># <a href="https://archive.org/details/2021-06-02-akkartik-sumeet">https://archive.org/details/2021-06-02-akkartik-sumeet</a></span>
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<span class="muComment">#</span>
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<span class="muComment"># To build on Linux:</span>
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<span class="muComment"># $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
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<span class="muComment"># $ cd mu/linux</span>
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<span class="muComment"># $ ./translate advent2017/1a.mu # emits a.elf</span>
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<span class="muComment"># To run on Linux:</span>
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<span class="muComment"># Download <a href="https://adventofcode.com/2017/day/1/input">https://adventofcode.com/2017/day/1/input</a></span>
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<span class="muComment"># $ ./a.elf < input</span>
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<span class="muComment"># Type in the number returned at <a href="https://adventofcode.com/2017/day/1">https://adventofcode.com/2017/day/1</a></span>
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<span class="PreProc">fn</span> <span class="muFunction">main</span><span class="PreProc"> -> </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
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<span class="PreProc">var</span> input_stream: (stream byte <span class="Constant">0x8000</span>)
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<span class="PreProc">var</span> input_stream_addr/<span class="muRegEsi">esi</span>: (addr stream byte) <span class="Special"><-</span> address input_stream
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<span class="PreProc">var</span> sum/<span class="muRegEdi">edi</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span>
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read-line-from-real-keyboard input_stream_addr
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<span class="PreProc">var</span> temp/<span class="muRegEax">eax</span>: int <span class="Special"><-</span> read_digit input_stream_addr
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<span class="PreProc">var</span> first_digit/<span class="muRegEbx">ebx</span>: int <span class="Special"><-</span> copy temp
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<span class="PreProc">var</span> this_digit/<span class="muRegEdx">edx</span>: int <span class="Special"><-</span> copy temp
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<span class="Delimiter">{</span>
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<span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special"><-</span> stream-empty? input_stream_addr
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compare done?, <span class="Constant">1</span>
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<span class="PreProc">break-if-=</span>
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<span class="PreProc">var</span> next_digit/<span class="muRegEax">eax</span>: int <span class="Special"><-</span> read_digit input_stream_addr
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<span class="muComment"># hacky newline check</span>
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compare next_digit, <span class="Constant">0</span>
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<span class="PreProc">break-if-<</span>
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<span class="Delimiter">{</span>
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compare this_digit, next_digit
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<span class="PreProc">break-if-!=</span>
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sum <span class="Special"><-</span> add this_digit
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<span class="Delimiter">}</span>
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this_digit <span class="Special"><-</span> copy next_digit
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<span class="PreProc">loop</span>
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<span class="Delimiter">}</span>
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<span class="muComment"># the last iteration will need to compare the last number to the first</span>
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<span class="Delimiter">{</span>
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compare this_digit, first_digit
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<span class="PreProc">break-if-!=</span>
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sum <span class="Special"><-</span> add this_digit
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<span class="Delimiter">}</span>
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print-int32-decimal <span class="Constant">0</span>, sum
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<span class="PreProc">return</span> <span class="Constant">0</span>/ok
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<span class="Delimiter">}</span>
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<span class="PreProc">fn</span> <span class="muFunction">read_digit</span> input_stream_addr: (addr stream byte)<span class="PreProc"> -> </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
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<span class="PreProc">var</span> next_digit/<span class="muRegEax">eax</span>: byte <span class="Special"><-</span> read-byte input_stream_addr
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next_digit <span class="Special"><-</span> subtract <span class="Constant">0x30</span>
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<span class="PreProc">var</span> next_digit/<span class="muRegEax">eax</span>: int <span class="Special"><-</span> copy next_digit
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<span class="PreProc">return</span> next_digit
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<span class="Delimiter">}</span>
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</pre>
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</body>
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</html>
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