ZealOS/docs/Demo/Carry.CC.html
2021-12-04 05:03:02 -05:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF2>//Shows the </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KernelB.HH.html#l203"><span class=cF4>Carry</span></a><span class=cF2> function. It holds the CPU carry flag.</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>//</span><a href="https://zeal-operating-system.github.io/ZealOS/Compiler/UAsm.CC.html#l836"><span class=cF4>U</span></a><span class=cF2>() Unassemble to make sure it is right.</span><span class=cF0>
<a name="l3"></a>
<a name="l4"></a></span><span class=cF1>U0</span><span class=cF0> BigCount()
<a name="l5"></a>{
<a name="l6"></a> </span><span class=cF9>U64</span><span class=cF0> lo = </span><span class=cFE>0</span><span class=cF0>, hi = </span><span class=cFE>0</span><span class=cF0>;
<a name="l7"></a>
<a name="l8"></a> </span><span class=cF6>&quot;BigCount\n&quot;</span><span class=cF0>;
<a name="l9"></a> </span><span class=cF1>while</span><span class=cF0> (hi &lt; </span><span class=cFE>0x10</span><span class=cF0>)
<a name="l10"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l11"></a> lo += </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFE>58</span><span class=cF0>;
<a name="l12"></a> hi += </span><span class=cF5>Carry</span><span class=cF0>;
<a name="l13"></a> </span><span class=cF6>&quot;%016X %016X\n&quot;</span><span class=cF0>, hi, lo;
<a name="l14"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l15"></a>}
<a name="l16"></a>
<a name="l17"></a>BigCount;
<a name="l18"></a>
<a name="l19"></a></span><span class=cF1>U0</span><span class=cF0> BigShift()
<a name="l20"></a>{
<a name="l21"></a> </span><span class=cF9>U64</span><span class=cF0> lo = </span><span class=cFE>1</span><span class=cF0>, hi = </span><span class=cFE>0</span><span class=cF0>;
<a name="l22"></a>
<a name="l23"></a> </span><span class=cF6>&quot;Big Shift\n&quot;</span><span class=cF0>;
<a name="l24"></a> </span><span class=cF1>while</span><span class=cF0> (lo || hi)
<a name="l25"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l26"></a> hi &lt;&lt;= </span><span class=cFE>1</span><span class=cF0>;
<a name="l27"></a> lo &lt;&lt;= </span><span class=cFE>1</span><span class=cF0>;
<a name="l28"></a> hi += </span><span class=cF5>Carry</span><span class=cF0>;
<a name="l29"></a> </span><span class=cF6>&quot;%016X %016X\n&quot;</span><span class=cF0>, hi, lo;
<a name="l30"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l31"></a>}
<a name="l32"></a>
<a name="l33"></a>BigShift;
<a name="l34"></a>
<a name="l35"></a></span><span class=cF1>U0</span><span class=cF0> Branch()
<a name="l36"></a>{
<a name="l37"></a> </span><span class=cF9>U64</span><span class=cF0> i = </span><span class=cFE>0xFFCC3311</span><span class=cF0>, j;
<a name="l38"></a>
<a name="l39"></a> </span><span class=cF6>'Branch\n'</span><span class=cF0>;
<a name="l40"></a> </span><span class=cF1>for</span><span class=cF0> (j = </span><span class=cFE>0</span><span class=cF0>; j &lt; </span><span class=cFE>64</span><span class=cF0>; j++)
<a name="l41"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l42"></a> i &lt;&lt;= </span><span class=cFE>1</span><span class=cF0>;
<a name="l43"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>Carry</span><span class=cF0>)
<a name="l44"></a> </span><span class=cF6>'1'</span><span class=cF0>;
<a name="l45"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l46"></a> </span><span class=cF6>'0'</span><span class=cF0>;
<a name="l47"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l48"></a> </span><span class=cF6>'\n'</span><span class=cF0>;
<a name="l49"></a>}
<a name="l50"></a>
<a name="l51"></a>Branch;
</span></pre></body>
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