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<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Rudimentary test harness</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment"># instruction                     effective address                                                   operand     displacement    immediate</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment"># op          subop               mod             rm32          base        index         scale       r32</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># 1-3 bytes   3 bits              2 bits          3 bits        3 bits      3 bits        2 bits      2 bits      0/1/2/4 bytes   0/1/2/4 bytes</span>
<span id="L8" class="LineNr"> 8 </span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment"># main:  (manual test if this is the last file loaded)</span>
<span id="L10" class="LineNr">10 </span>  <span class="Comment"># check-ints-equal(34, 34)</span>
<span id="L11" class="LineNr">11 </span>  68/push  &quot;error in check-ints-equal&quot;/imm32
<span id="L12" class="LineNr">12 </span>  68/push  34/imm32
<span id="L13" class="LineNr">13 </span>  68/push  34/imm32
<span id="L14" class="LineNr">14 </span>  e8/call  check-ints-equal/disp32
<span id="L15" class="LineNr">15 </span>  81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              0xc/imm32         <span class="Comment"># add to ESP</span>
<span id="L16" class="LineNr">16 </span>  <span class="Comment"># syscall(exit, 0)</span>
<span id="L17" class="LineNr">17 </span>  bb/copy-to-EBX  0/imm32
<span id="L18" class="LineNr">18 </span>  b8/copy-to-EAX  1/imm32
<span id="L19" class="LineNr">19 </span>  cd/syscall  0x80/imm8
<span id="L20" class="LineNr">20 </span>
<span id="L21" class="LineNr">21 </span><span class="Comment"># print msg to stderr if a != b, otherwise print &quot;.&quot;</span>
<span id="L22" class="LineNr">22 </span>check-ints-equal:  <span class="Comment"># (a : int, b : int, msg : (address array byte)) -&gt; boolean</span>
<span id="L23" class="LineNr">23 </span>  <span class="Comment"># prolog</span>
<span id="L24" class="LineNr">24 </span>  55/push-EBP
<span id="L25" class="LineNr">25 </span>  89/copy                         3/mod/direct    5/rm32/EBP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          4/r32/ESP  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># copy ESP to EBP</span>
<span id="L26" class="LineNr">26 </span>  <span class="Comment"># save registers</span>
<span id="L27" class="LineNr">27 </span>  51/push-ECX
<span id="L28" class="LineNr">28 </span>  53/push-EBX
<span id="L29" class="LineNr">29 </span>  <span class="Comment"># load first 2 args into EAX and EBX</span>
<span id="L30" class="LineNr">30 </span>  8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="Delimiter"> . </span>          0/r32/EAX   0x8/disp8      <span class="Delimiter"> . </span>                <span class="Comment"># copy *(EBP+8) to EAX</span>
<span id="L31" class="LineNr">31 </span>  8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="Delimiter"> . </span>          3/r32/EBX   0xc/disp8      <span class="Delimiter"> . </span>                <span class="Comment"># copy *(EBP+12) to EBX</span>
<span id="L32" class="LineNr">32 </span>  <span class="Comment"># if EAX == b/EBX</span>
<span id="L33" class="LineNr">33 </span>  39/compare                      3/mod/direct    0/rm32/EAX   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          3/r32/EBX  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># compare EAX and EBX</span>
<span id="L34" class="LineNr">34 </span>  75/jump-if-unequal  $check-ints-equal:else/disp8
<span id="L35" class="LineNr">35 </span>    <span class="Comment"># _write(2/stderr, '.')</span>
<span id="L36" class="LineNr">36 </span>      <span class="Comment"># push args</span>
<span id="L37" class="LineNr">37 </span>  68/push  &quot;.&quot;/imm32
<span id="L38" class="LineNr">38 </span>  68/push  2/imm32/stderr
<span id="L39" class="LineNr">39 </span>      <span class="Comment"># call</span>
<span id="L40" class="LineNr">40 </span>  e8/call  _write/disp32
<span id="L41" class="LineNr">41 </span>      <span class="Comment"># discard args</span>
<span id="L42" class="LineNr">42 </span>  81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              8/imm32           <span class="Comment"># add to ESP</span>
<span id="L43" class="LineNr">43 </span>    <span class="Comment"># return</span>
<span id="L44" class="LineNr">44 </span>  eb/jump  $check-ints-equal:end/disp8
<span id="L45" class="LineNr">45 </span>  <span class="Comment"># else:</span>
<span id="L46" class="LineNr">46 </span>$check-ints-equal:else:
<span id="L47" class="LineNr">47 </span>    <span class="Comment"># _write(2/stderr, msg)</span>
<span id="L48" class="LineNr">48 </span>      <span class="Comment"># push args</span>
<span id="L49" class="LineNr">49 </span>  8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="Delimiter"> . </span>          1/r32/ECX   0x10/disp8     <span class="Delimiter"> . </span>                <span class="Comment"># copy *(EBP+16) to ECX</span>
<span id="L50" class="LineNr">50 </span>  51/push-ECX
<span id="L51" class="LineNr">51 </span>  68/push  2/imm32/stderr
<span id="L52" class="LineNr">52 </span>      <span class="Comment"># call</span>
<span id="L53" class="LineNr">53 </span>  e8/call  _write/disp32
<span id="L54" class="LineNr">54 </span>      <span class="Comment"># discard args</span>
<span id="L55" class="LineNr">55 </span>  81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              8/imm32           <span class="Comment"># add to ESP</span>
<span id="L56" class="LineNr">56 </span>    <span class="Comment"># _write(2/stderr, Newline)</span>
<span id="L57" class="LineNr">57 </span>      <span class="Comment"># push args</span>
<span id="L58" class="LineNr">58 </span>  68/push  Newline/imm32
<span id="L59" class="LineNr">59 </span>  68/push  2/imm32/stderr
<span id="L60" class="LineNr">60 </span>      <span class="Comment"># call</span>
<span id="L61" class="LineNr">61 </span>  e8/call  _write/disp32
<span id="L62" class="LineNr">62 </span>      <span class="Comment"># discard args</span>
<span id="L63" class="LineNr">63 </span>  81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              8/imm32           <span class="Comment"># add to ESP</span>
<span id="L64" class="LineNr">64 </span>    <span class="Comment"># increment Num-test-failures</span>
<span id="L65" class="LineNr">65 </span>  ff          0/subop/increment   0/mod/indirect  5/rm32/.disp32           <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>          Num-test-failures/disp32          <span class="Comment"># increment *Num-test-failures</span>
<span id="L66" class="LineNr">66 </span>$check-ints-equal:end:
<span id="L67" class="LineNr">67 </span>  <span class="Comment"># restore registers</span>
<span id="L68" class="LineNr">68 </span>  5b/pop-to-EBX
<span id="L69" class="LineNr">69 </span>  59/pop-to-ECX
<span id="L70" class="LineNr">70 </span>  <span class="Comment"># epilog</span>
<span id="L71" class="LineNr">71 </span>  89/copy                         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          5/r32/EBP  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># copy EBP to ESP</span>
<span id="L72" class="LineNr">72 </span>  5d/pop-to-EBP
<span id="L73" class="LineNr">73 </span>  c3/return
<span id="L74" class="LineNr">74 </span>
<span id="L75" class="LineNr">75 </span>== data
<span id="L76" class="LineNr">76 </span>
<span id="L77" class="LineNr">77 </span>Newline:
<span id="L78" class="LineNr">78 </span>  <span class="Comment"># size</span>
<span id="L79" class="LineNr">79 </span>  01 00 00 00
<span id="L80" class="LineNr">80 </span>  <span class="Comment"># data</span>
<span id="L81" class="LineNr">81 </span>  0a/newline
<span id="L82" class="LineNr">82 </span>
<span id="L83" class="LineNr">83 </span>Num-test-failures:
<span id="L84" class="LineNr">84 </span>  00 00 00 00
<span id="L85" class="LineNr">85 </span>
<span id="L86" class="LineNr">86 </span><span class="Comment"># vim&#0058;nowrap:textwidth=0</span>
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