Experimental parser: merge r19949

test/mjsunit/harmony/math-log1p.js

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --harmony-maths
-
-assertTrue(isNaN(Math.log1p(NaN)));
-assertTrue(isNaN(Math.log1p(function() {})));
-assertTrue(isNaN(Math.log1p({ toString: function() { return NaN; } })));
-assertTrue(isNaN(Math.log1p({ valueOf: function() { return "abc"; } })));
-assertEquals("Infinity", String(1/Math.log1p(0)));
-assertEquals("-Infinity", String(1/Math.log1p(-0)));
-assertEquals("Infinity", String(Math.log1p(Infinity)));
-assertEquals("-Infinity", String(Math.log1p(-1)));
-assertTrue(isNaN(Math.log1p(-2)));
-assertTrue(isNaN(Math.log1p(-Infinity)));
-
-for (var x = 1E300; x > 1E-1; x *= 0.8) {
-  var expected = Math.log(x + 1);
-  assertEqualsDelta(expected, Math.log1p(x), expected * 1E-14);
-}
-
-// Values close to 0:
-// Use Taylor expansion at 1 for log(x) as test expectation:
-// log1p(x) == log(x + 1) == 0 + x / 1 - x^2 / 2 + x^3 / 3 - ...
-function log1p(x) {
-  var terms = [];
-  var prod = x;
-  for (var i = 1; i <= 20; i++) {
-    terms.push(prod / i);
-    prod *= -x;
-  }
-  var sum = 0;
-  while (terms.length > 0) sum += terms.pop();
-  return sum;
-}
-
-for (var x = 1E-1; x > 1E-300; x *= 0.8) {
-  var expected = log1p(x);
-  assertEqualsDelta(expected, Math.log1p(x), expected * 1E-14);
-}