chrome/test/data/dromaeo/tests/sunspider-math-cordic.html

   1 <html>
   2 <head>
   3 <script src="../htmlrunner.js"></script>
   4 <script>
   5 /*
   6  * Copyright (C) Rich Moore.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  25  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /////. Start CORDIC
  31
  32 var AG_CONST = 0.6072529350;
  33
  34 function FIXED(X)
  35 {
  36   return X * 65536.0;
  37 }
  38
  39 function FLOAT(X)
  40 {
  41   return X / 65536.0;
  42 }
  43
  44 function DEG2RAD(X)
  45 {
  46   return 0.017453 * (X);
  47 }
  48
  49 var Angles = [
  50   FIXED(45.0), FIXED(26.565), FIXED(14.0362), FIXED(7.12502),
  51   FIXED(3.57633), FIXED(1.78991), FIXED(0.895174), FIXED(0.447614),
  52   FIXED(0.223811), FIXED(0.111906), FIXED(0.055953),
  53   FIXED(0.027977)
  54               ];
  55
  56
  57 function cordicsincos() {
  58     var X;
  59     var Y;
  60     var TargetAngle;
  61     var CurrAngle;
  62     var Step;
  63
  64     X = FIXED(AG_CONST);         /* AG_CONST * cos(0) */
  65     Y = 0;                       /* AG_CONST * sin(0) */
  66
  67     TargetAngle = FIXED(28.027);
  68     CurrAngle = 0;
  69     for (Step = 0; Step < 12; Step++) {
  70         var NewX;
  71         if (TargetAngle > CurrAngle) {
  72             NewX = X - (Y >> Step);
  73             Y = (X >> Step) + Y;
  74             X = NewX;
  75             CurrAngle += Angles[Step];
  76         } else {
  77             NewX = X + (Y >> Step);
  78             Y = -(X >> Step) + Y;
  79             X = NewX;
  80             CurrAngle -= Angles[Step];
  81         }
  82     }
  83 }
  84
  85 ///// End CORDIC
  86
  87 function cordic( runs ) {
  88   for ( var i = 0 ; i < runs ; i++ ) {
  89       cordicsincos();
  90   }
  91 }
  92
  93 window.onload = function(){ startTest("sunspider-math-cordic", '211c9ee6');
  94
  95 test("Cordic", function(){
  96         cordic(2500);
  97 });
  98
  99 endTest(); };
 100 </script>
 101 </head>
 102 <body></body>
 103 </html>