<!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 - 314divide.subx</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: #c6c6c6; } body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } a { color:inherit; } * { font-size:12pt; font-size: 1em; } .subxComment { color: #005faf; } .LineNr { } .subxS1Comment { color: #0000af; } .subxFunction { color: #af5f00; text-decoration: underline; } .Constant { color: #008787; } --> </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/314divide.subx'>https://github.com/akkartik/mu/blob/main/314divide.subx</a> <pre id='vimCodeElement'> <span id="L1" class="LineNr"> 1 </span>== code <span id="L2" class="LineNr"> 2 </span> <span id="L3" class="LineNr"> 3 </span><span class="subxFunction">integer-divide</span>: <span class="subxComment"># a: int, b: int -> quotient/eax: int, remainder/edx: int</span> <span id="L4" class="LineNr"> 4 </span> <span class="subxS1Comment"># . prologue</span> <span id="L5" class="LineNr"> 5 </span> 55/push-ebp <span id="L6" class="LineNr"> 6 </span> 89/<- %ebp 4/r32/esp <span id="L7" class="LineNr"> 7 </span> <span class="subxComment"># eax = a</span> <span id="L8" class="LineNr"> 8 </span> 8b/-> *(ebp+8) 0/r32/eax <span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># edx = all 0s or all 1s</span> <span id="L10" class="LineNr">10 </span> 99/sign-extend-eax-into-edx <span id="L11" class="LineNr">11 </span> <span class="subxComment"># quotient, remainder = divide eax by b</span> <span id="L12" class="LineNr">12 </span> f7 7/subop/divide-eax-edx-by *(ebp+0xc) <span id="L13" class="LineNr">13 </span><span class="Constant">$integer-divide:end</span>: <span id="L14" class="LineNr">14 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L15" class="LineNr">15 </span> 89/<- %esp 5/r32/ebp <span id="L16" class="LineNr">16 </span> 5d/pop-to-ebp <span id="L17" class="LineNr">17 </span> c3/return </pre> </body> </html> <!-- vim: set foldmethod=manual : -->