Harmony: implement Math.log2 and Math.log10.

test/mjsunit/harmony/math-log2-log10.js

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-// Flags: --allow-natives-syntax
+// Flags: --harmony-maths
 
-var a = new Array(2);
-a[0] = 1;
-assertTrue(%HasFastSmiElements(a));
-assertTrue(%HasFastHoleyElements(a));
+[Math.log10, Math.log2].forEach( function(fun) {
+  assertTrue(isNaN(fun(NaN)));
+  assertTrue(isNaN(fun(fun)));
+  assertTrue(isNaN(fun({ toString: function() { return NaN; } })));
+  assertTrue(isNaN(fun({ valueOf: function() { return -1; } })));
+  assertTrue(isNaN(fun({ valueOf: function() { return "abc"; } })));
+  assertTrue(isNaN(fun(-0.1)));
+  assertTrue(isNaN(fun(-1)));
+  assertEquals("-Infinity", String(fun(0)));
+  assertEquals("-Infinity", String(fun(-0)));
+  assertEquals(0, fun(1));
+  assertEquals("Infinity", String(fun(Infinity)));
+});
 
-function hole(i) {
-  return a[i] << 0;
+for (var i = -300; i < 300; i += 0.7) {
+  assertEqualsDelta(i, Math.log10(Math.pow(10, i)), 1E-13);
+  assertEqualsDelta(i, Math.log2(Math.pow(2, i)), 1E-13);
 }
-
-assertEquals(1, hole(0));
-assertEquals(1, hole(0));
-%OptimizeFunctionOnNextCall(hole);
-assertEquals(0, hole(1));