tests/stress/math-pow-integer-exponent-fastpath.js

   1 function valuesAreClose(a, b) {
   2     return Math.abs(a / b) - 1 < 1e-10;
   3 }
   4
   5 // Small exponent values are handled through a simpler inline loop. Test that it is not observable.
   6 function mathPowDoubleDoubleTestExponentFifty(x, y) {
   7     return Math.pow(x, y)
   8 }
   9 noInline(mathPowDoubleDoubleTestExponentFifty);
  10
  11 function mathPowDoubleIntTestExponentFifty(x, y) {
  12     return Math.pow(x, y)
  13 }
  14 noInline(mathPowDoubleIntTestExponentFifty);
  15 function testExponentFifty(x, y, expected) {
  16     for (var i = 0; i < 10000; ++i) {
  17         var result = mathPowDoubleDoubleTestExponentFifty(x, y);
  18         if (!valuesAreClose(result, expected))
  19             throw "Error: bad result, Math.pow(" + x + ", " + y + ") = " + result + " expected value close to " + expected;
  20     }
  21     var integerY = y | 0;
  22     for (var i = 0; i < 10000; ++i) {
  23         var result = mathPowDoubleIntTestExponentFifty(x, integerY);
  24         if (!valuesAreClose(result, expected))
  25             throw "Error: bad result, Math.pow(" + x + ", " + integerY + ") = " + result + " expected value close to " + expected;
  26     }
  27 }
  28 noInline(testExponentFifty);
  29 testExponentFifty(53.70901164133102, 50.0, 3.179494118120144e+86);
  30 testExponentFifty(53.70901164133102, -10.0, 5.006432842621192e-18);
  31
  32 function mathPowDoubleDoubleTestExponentTenThousands(x, y) {
  33     return Math.pow(x, y)
  34 }
  35 noInline(mathPowDoubleDoubleTestExponentTenThousands);
  36
  37 function mathPowDoubleIntTestExponentTenThousands(x, y) {
  38     return Math.pow(x, y)
  39 }
  40 noInline(mathPowDoubleIntTestExponentTenThousands);
  41 function testExponentTenThousands(x, y, expected) {
  42     for (var i = 0; i < 10000; ++i) {
  43         var result = mathPowDoubleDoubleTestExponentTenThousands(x, y);
  44         if (!valuesAreClose(result, expected))
  45             throw "Error: bad result, Math.pow(" + x + ", " + y + ") = " + result + " expected value close to " + expected;
  46     }
  47     var integerY = y | 0;
  48     for (var i = 0; i < 10000; ++i) {
  49         var result = mathPowDoubleIntTestExponentTenThousands(x, integerY);
  50         if (!valuesAreClose(result, expected))
  51             throw "Error: bad result, Math.pow(" + x + ", " + integerY + ") = " + result + " expected value close to " + expected;
  52     }
  53 }
  54 noInline(testExponentTenThousands);
  55 testExponentTenThousands(1.001, 10000.0, 21916.681339048373);
  56 testExponentTenThousands(1.001, -1.0, 0.9990009990009991);