ZealOS/docs/Demo/TimeIns.CC.html
2021-08-09 02:04:03 -04:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF2>/*Allows you to time insts.</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>Results vary because the CPU does</span><span class=cF0>
<a name="l3"></a></span><span class=cF2>parallel and out-of-order execution.</span><span class=cF0>
<a name="l4"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l5"></a>
<a name="l6"></a>#</span><span class=cF1>define</span><span class=cF0> SAMPLE_SIZE </span><span class=cFE>10000000</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TimeIns</span><span class=cF0>()
<a name="l9"></a>{
<a name="l10"></a> </span><span class=cF9>I64</span><span class=cF0> i, </span><span class=cF1>start</span><span class=cF0>, </span><span class=cF1>end</span><span class=cF0>, overhead_time, test_time;
<a name="l11"></a> </span><span class=cF1>F64</span><span class=cF0> d = </span><span class=cFE>5</span><span class=cF0>.</span><span class=cFE>0</span><span class=cF0>;
<a name="l12"></a>
<a name="l13"></a> </span><span class=cF2>//Measure Loop Overhead</span><span class=cF0>
<a name="l14"></a> </span><span class=cF1>start</span><span class=cF0> = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l15"></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="l16"></a> </span><span class=cF1>end</span><span class=cF0> = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l17"></a> overhead_time = </span><span class=cF1>end</span><span class=cF0> - </span><span class=cF1>start</span><span class=cF0>;
<a name="l18"></a> </span><span class=cF6>&quot;\nOverhead Cycles:%12.6f\n&quot;</span><span class=cF0>, </span><span class=cF5>ToF64</span><span class=cF0>(overhead_time) / SAMPLE_SIZE;
<a name="l19"></a>
<a name="l20"></a> </span><span class=cF1>start</span><span class=cF0> = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l21"></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="l22"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l23"></a> #</span><span class=cF1>exe</span><span class=cF0> {</span><span class=cF5>PassTrace</span><span class=cF0>(</span><span class=cFE>0b10000000000</span><span class=cF0>);};
<a name="l24"></a></span><span class=cF2>//Time these insts</span><span class=cF0>
<a name="l25"></a> d *= </span><span class=cFE>1</span><span class=cF0>.</span><span class=cFE>00001</span><span class=cF0>;
<a name="l26"></a> #</span><span class=cF1>exe</span><span class=cF0> {</span><span class=cF5>PassTrace</span><span class=cF0>(</span><span class=cFE>0</span><span class=cF0>);};
<a name="l27"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l28"></a> </span><span class=cF1>end</span><span class=cF0> = </span><span class=cF5>TSCGet</span><span class=cF0>;
<a name="l29"></a> test_time = </span><span class=cF1>end</span><span class=cF0> - </span><span class=cF1>start</span><span class=cF0>;
<a name="l30"></a>
<a name="l31"></a> </span><span class=cF6>&quot;Measured Cycles:%12.6f\n&quot;</span><span class=cF0>, </span><span class=cF5>ToF64</span><span class=cF0>(test_time - overhead_time) / SAMPLE_SIZE;
<a name="l32"></a>}
<a name="l33"></a>
<a name="l34"></a></span><span class=cF5>TimeIns</span><span class=cF0>;
<a name="l35"></a></span><span class=cF5>TimeIns</span><span class=cF0>;
<a name="l36"></a></span><span class=cF5>TimeIns</span><span class=cF0>;
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