js/src/jit-test/tests/sunspider/check-math-partial-sums.js

   1 // The Computer Language Shootout
   2 // http://shootout.alioth.debian.org/
   3 // contributed by Isaac Gouy
   4
   5 function partial(n){
   6     var a1 = a2 = a3 = a4 = a5 = a6 = a7 = a8 = a9 = 0.0;
   7     var twothirds = 2.0/3.0;
   8     var alt = -1.0;
   9     var k2 = k3 = sk = ck = 0.0;
  10
  11     for (var k = 1; k <= n; k++){
  12         k2 = k*k;
  13         k3 = k2*k;
  14         sk = Math.sin(k);
  15         ck = Math.cos(k);
  16         alt = -alt;
  17
  18         a1 += Math.pow(twothirds,k-1);
  19         a2 += Math.pow(k,-0.5);
  20         a3 += 1.0/(k*(k+1.0));
  21         a4 += 1.0/(k3 * sk*sk);
  22         a5 += 1.0/(k3 * ck*ck);
  23         a6 += 1.0/k;
  24         a7 += 1.0/k2;
  25         a8 += alt/k;
  26         a9 += alt/(2*k -1);
  27     }
  28
  29     return [ a1, a2, a3, a4, a5, a6, a7, a8, a9 ];
  30 }
  31
  32 var actual = [];
  33 for (var i = 1024; i <= 16384; i *= 2)
  34   Array.prototype.push.apply(actual, partial(i));
  35
  36 var eps = 1e-12;
  37 var expect = [2.9999999999999987,62.555269219624684,0.9990243902439033,30.174793391263677,42.99468748637077,7.509175672278132,1.6439579810301654,0.6926591377284127,0.785154022830656,2.9999999999999987,89.06036157695789,0.9995119570522216,30.30796333494624,42.99485339033617,8.202078771817716,1.6444459047881168,0.6929030995395857,0.7852760930922243,2.9999999999999987,126.54745783224483,0.999755918965097,30.314167756318135,42.994888939123,8.89510389696629,1.6446899560231332,0.6930251251486118,0.7853371282421086,2.9999999999999987,179.56450569047874,0.9998779445868421,30.314499725429847,42.99489723774016,9.588190046095265,1.644812003986005,0.693086149128997,0.785367645819433,2.9999999999999987,254.54355172132264,0.9999389685688135,30.31451920492601,42.99489939769195,10.281306710008463,1.6448730335545856,0.6931166639131536,0.7853829046083998];
  38
  39 assertEq(actual.length, expect.length);
  40 for (var i = 0; i < expect.length; ++i)
  41   assertEq(Math.abs(actual[i] - expect[i]) < eps, true);