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<a href='https://github.com/akkartik/mu/blob/main/linux/406int32.mu'>https://github.com/akkartik/mu/blob/main/linux/406int32.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Some slow but convenient helpers</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># slow, iterative shift-left instruction</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># preconditions: _nr >= 0, _dr > 0</span>
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L5'>repeated-shift-left</a></span> nr: int, dr: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy nr
<span id="L7" class="LineNr"> 7 </span> <span class="Delimiter">{</span>
<span id="L8" class="LineNr"> 8 </span> compare dr, <span class="Constant">0</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">break-if-<=</span>
<span id="L10" class="LineNr">10 </span> result <span class="Special"><-</span> shift-left <span class="Constant">1</span>
<span id="L11" class="LineNr">11 </span> decrement dr
<span id="L12" class="LineNr">12 </span> <span class="PreProc">loop</span>
<span id="L13" class="LineNr">13 </span> <span class="Delimiter">}</span>
<span id="L14" class="LineNr">14 </span> <span class="PreProc">return</span> result
<span id="L15" class="LineNr">15 </span><span class="Delimiter">}</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="muComment"># slow, iterative shift-right instruction</span>
<span id="L18" class="LineNr">18 </span><span class="muComment"># preconditions: _nr >= 0, _dr > 0</span>
<span id="L19" class="LineNr">19 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L19'>repeated-shift-right</a></span> nr: int, dr: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy nr
<span id="L21" class="LineNr">21 </span> <span class="Delimiter">{</span>
<span id="L22" class="LineNr">22 </span> compare dr, <span class="Constant">0</span>
<span id="L23" class="LineNr">23 </span> <span class="PreProc">break-if-<=</span>
<span id="L24" class="LineNr">24 </span> result <span class="Special"><-</span> shift-right <span class="Constant">1</span>
<span id="L25" class="LineNr">25 </span> decrement dr
<span id="L26" class="LineNr">26 </span> <span class="PreProc">loop</span>
<span id="L27" class="LineNr">27 </span> <span class="Delimiter">}</span>
<span id="L28" class="LineNr">28 </span> <span class="PreProc">return</span> result
<span id="L29" class="LineNr">29 </span><span class="Delimiter">}</span>
<span id="L30" class="LineNr">30 </span>
<span id="L31" class="LineNr">31 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L31'>abs</a></span> n: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L32" class="LineNr">32 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy n
<span id="L33" class="LineNr">33 </span> <span class="Delimiter">{</span>
<span id="L34" class="LineNr">34 </span> compare n, <span class="Constant">0</span>
<span id="L35" class="LineNr">35 </span> <span class="PreProc">break-if->=</span>
<span id="L36" class="LineNr">36 </span> result <span class="Special"><-</span> negate
<span id="L37" class="LineNr">37 </span> <span class="Delimiter">}</span>
<span id="L38" class="LineNr">38 </span> <span class="PreProc">return</span> result
<span id="L39" class="LineNr">39 </span><span class="Delimiter">}</span>
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