Harmony: implement Math.cbrt, Math.expm1 and Math.log1p.

src/harmony-math.js

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@@ skipping 136 matching lines @@
     var n = args[i] / max;
     var summand = n * n - compensation;
     var preliminary = sum + summand;
     compensation = (preliminary - sum) - summand;
     sum = preliminary;
   }
   return MathSqrt(sum) * max;
 }
 
 
+//ES6 draft 09-27-13, section 20.2.2.9.
+function MathCbrt(x) {
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
+  if (x === 0 || !NUMBER_IS_FINITE(x)) return x;

[Jarin, 2014/02/18 14:08:53]

Is there any reason why you check for the corner cases for MathCbrt, but not for
the other functions? (runtime.cc seems to do the same checks.)

+  return %Math_cbrt(x);
+}
+
+
+//ES6 draft 09-27-13, section 20.2.2.14.
+function MathExpm1(x) {
+  return %Math_expm1(TO_NUMBER_INLINE(x));
+}
+
+
+//ES6 draft 09-27-13, section 20.2.2.20.
+function MathLog1p(x) {
+  return %Math_log1p(TO_NUMBER_INLINE(x));
+}
+
+
 function ExtendMath() {
   %CheckIsBootstrapping();
 
   // Set up the non-enumerable functions on the Math object.
   InstallFunctions($Math, DONT_ENUM, $Array(
     "sign", MathSign,
     "trunc", MathTrunc,
     "sinh", MathSinh,
     "cosh", MathCosh,
     "tanh", MathTanh,
     "asinh", MathAsinh,
     "acosh", MathAcosh,
     "atanh", MathAtanh,
     "log10", MathLog10,
     "log2", MathLog2,
-    "hypot", MathHypot
+    "hypot", MathHypot,
+    "cbrt", MathCbrt,
+    "log1p", MathLog1p,
+    "expm1", MathExpm1
   ));
 }
 
 ExtendMath();