ZealOS/docs/Demo/Asm/DivByHand.CC.html
TomAwezome 923b700822 Change DVDImageWrite to use single buffer.
Add CAtapiWriteCmd for AHCIAtapiBlksWrite.
Remove AHCIAtapiSeek and AHCIAtapiFormat.
2021-08-15 02:23:46 -04:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF1>asm</span><span class=cF0> {
<a name="l2"></a>_DIV_U64_BY_U64::
<a name="l3"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l4"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>, </span><span class=cFC>RSP</span><span class=cF0>
<a name="l5"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>, </span><span class=cFC>RDX</span><span class=cF0>
<a name="l6"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>, </span><span class=cFE>64</span><span class=cF0>
<a name="l7"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>, </span><span class=cF3>SF_ARG1</span><span class=cF0>[</span><span class=cFC>RBP</span><span class=cF0>]
<a name="l8"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RBX</span><span class=cF0>, </span><span class=cF3>SF_ARG2</span><span class=cF0>[</span><span class=cFC>RBP</span><span class=cF0>]
<a name="l9"></a>@@1: </span><span class=cF1>SHL1</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>
<a name="l10"></a> </span><span class=cF1>RCL1</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>
<a name="l11"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cFC>RBX</span><span class=cF0>, </span><span class=cFC>RDX</span><span class=cF0>
<a name="l12"></a> </span><span class=cF1>JA</span><span class=cF0> @@2
<a name="l13"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>
<a name="l14"></a> </span><span class=cF1>SUB</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>, </span><span class=cFC>RBX</span><span class=cF0>
<a name="l15"></a>@@2: </span><span class=cF1>LOOP</span><span class=cF0> @@1
<a name="l16"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>RET1</span><span class=cF0> </span><span class=cFE>16</span><span class=cF0>
<a name="l18"></a>}
<a name="l19"></a>
<a name="l20"></a></span><span class=cF1>_extern</span><span class=cF0> _DIV_U64_BY_U64 </span><span class=cF9>I64</span><span class=cF0> DivU64ByU64(</span><span class=cF9>I64</span><span class=cF0> dividend, </span><span class=cF9>I64</span><span class=cF0> divisor);
<a name="l21"></a>
<a name="l22"></a></span><span class=cF6>&quot;123456/10=%d\n&quot;</span><span class=cF0>, DivU64ByU64(</span><span class=cFE>123456</span><span class=cF0>, </span><span class=cFE>10</span><span class=cF0>);</span></pre></body>
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