ZealOS/docs/Demo/Lectures/AndNotMod.ZC.html
2021-12-11 06:10:58 -05:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF2>//You may wonder why &quot;&amp;&quot; is used instead of &quot;%&quot;.</span><span class=cF0>
<a name="l2"></a>
<a name="l3"></a>#</span><span class=cF1>define</span><span class=cF0> SAMPLE_SIZE </span><span class=cFE>100000000</span><span class=cF0>
<a name="l4"></a>
<a name="l5"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TimeIns</span><span class=cF0>()
<a name="l6"></a>{
<a name="l7"></a> </span><span class=cF9>I64</span><span class=cF0> start1, end1, start2, end2, overhead_time, test_time;
<a name="l8"></a> </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF1>reg</span><span class=cF0> i, </span><span class=cF1>reg</span><span class=cF0> tmp;
<a name="l9"></a>
<a name="l10"></a> </span><span class=cF5>CPURep</span><span class=cF0>;
<a name="l11"></a>
<a name="l12"></a> </span><span class=cF2>//Measure Loop Overhead</span><span class=cF0>
<a name="l13"></a> start1 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l14"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; SAMPLE_SIZE; i++)
<a name="l15"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l16"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l17"></a> end1 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l18"></a> overhead_time = end1 - start1;
<a name="l19"></a>
<a name="l20"></a> </span><span class=cF2>//Measure remainder...</span><span class=cF0>
<a name="l21"></a> start2 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l22"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; SAMPLE_SIZE; i++)
<a name="l23"></a> tmp = i % </span><span class=cFE>0x400</span><span class=cF0>;
<a name="l24"></a> end2 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l25"></a> test_time = end2 - start2;
<a name="l26"></a> </span><span class=cF6>&quot;Remainder Version #1 Cycles\t: %10.5f\n&quot;</span><span class=cF0>, </span><span class=cF5>ToF64</span><span class=cF0>(test_time - overhead_time) / SAMPLE_SIZE;
<a name="l27"></a>
<a name="l28"></a> </span><span class=cF2>//Measure remainder...</span><span class=cF0>
<a name="l29"></a> start2 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l30"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; SAMPLE_SIZE; i++)
<a name="l31"></a> tmp = i &amp; </span><span class=cFE>0x3FF</span><span class=cF0>;
<a name="l32"></a> end2 = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l33"></a> test_time = end2 - start2;
<a name="l34"></a> </span><span class=cF6>&quot;Remainder Version #2 Cycles\t: %10.5f\n&quot;</span><span class=cF0>, </span><span class=cF5>ToF64</span><span class=cF0>(test_time - overhead_time) / SAMPLE_SIZE;
<a name="l35"></a>}
<a name="l36"></a>
<a name="l37"></a></span><span class=cF5>TimeIns</span><span class=cF0>;
<a name="l38"></a>
<a name="l39"></a></span><span class=cF2>/*</span><span class=cF0> </span><span class=cF2>Program Output</span><span class=cF1>
<a name="l40"></a>8 Cores 2.660GHz
<a name="l41"></a>Remainder Version #1 Cycles : 26.85345
<a name="l42"></a>Remainder Version #2 Cycles : -0.00800
<a name="l43"></a></span><span class=cF2>*/</span><span class=cF1>
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