The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/jit-test/tests/sunspider/check-math-cordic.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,94 @@
     1.4 +/*
     1.5 + * Copyright (C) Rich Moore.  All rights reserved.
     1.6 + *
     1.7 + * Redistribution and use in source and binary forms, with or without
     1.8 + * modification, are permitted provided that the following conditions
     1.9 + * are met:
    1.10 + * 1. Redistributions of source code must retain the above copyright
    1.11 + *    notice, this list of conditions and the following disclaimer.
    1.12 + * 2. Redistributions in binary form must reproduce the above copyright
    1.13 + *    notice, this list of conditions and the following disclaimer in the
    1.14 + *    documentation and/or other materials provided with the distribution.
    1.15 + *
    1.16 + * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY
    1.17 + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.18 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    1.19 + * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
    1.20 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    1.21 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    1.22 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    1.23 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
    1.24 + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    1.25 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    1.26 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
    1.27 + */
    1.28 +
    1.29 +/////. Start CORDIC
    1.30 +
    1.31 +var AG_CONST = 0.6072529350;
    1.32 +
    1.33 +function FIXED(X)
    1.34 +{
    1.35 +  return X * 65536.0;
    1.36 +}
    1.37 +
    1.38 +function FLOAT(X)
    1.39 +{
    1.40 +  return X / 65536.0;
    1.41 +}
    1.42 +
    1.43 +function DEG2RAD(X)
    1.44 +{
    1.45 +  return 0.017453 * (X);
    1.46 +}
    1.47 +
    1.48 +var Angles = [
    1.49 +  FIXED(45.0), FIXED(26.565), FIXED(14.0362), FIXED(7.12502),
    1.50 +  FIXED(3.57633), FIXED(1.78991), FIXED(0.895174), FIXED(0.447614),
    1.51 +  FIXED(0.223811), FIXED(0.111906), FIXED(0.055953),
    1.52 +  FIXED(0.027977) 
    1.53 +              ];
    1.54 +
    1.55 +
    1.56 +function cordicsincos() {
    1.57 +    var X;
    1.58 +    var Y;
    1.59 +    var TargetAngle;
    1.60 +    var CurrAngle;
    1.61 +    var Step;
    1.62 + 
    1.63 +    X = FIXED(AG_CONST);         /* AG_CONST * cos(0) */
    1.64 +    Y = 0;                       /* AG_CONST * sin(0) */
    1.65 +
    1.66 +    TargetAngle = FIXED(28.027);
    1.67 +    CurrAngle = 0;
    1.68 +    for (Step = 0; Step < 12; Step++) {
    1.69 +        var NewX;
    1.70 +        if (TargetAngle > CurrAngle) {
    1.71 +            NewX = X - (Y >> Step);
    1.72 +            Y = (X >> Step) + Y;
    1.73 +            X = NewX;
    1.74 +            CurrAngle += Angles[Step];
    1.75 +        } else {
    1.76 +            NewX = X + (Y >> Step);
    1.77 +            Y = -(X >> Step) + Y;
    1.78 +            X = NewX;
    1.79 +            CurrAngle -= Angles[Step];
    1.80 +        }
    1.81 +    }
    1.82 +    return CurrAngle;
    1.83 +}
    1.84 +
    1.85 +///// End CORDIC
    1.86 +
    1.87 +function cordic( runs ) {
    1.88 +  var actual;
    1.89 +
    1.90 +  for ( var i = 0 ; i < runs ; i++ ) {
    1.91 +    actual = cordicsincos();
    1.92 +  }
    1.93 +
    1.94 +  assertEq(actual, 1834995.3515519998)
    1.95 +}
    1.96 +
    1.97 +cordic(25000);