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

src/harmony-math.js

Index: src/harmony-math.js
diff --git a/src/harmony-math.js b/src/harmony-math.js
index ee426ef1191f417b2178b17581c1a516704ecaab..7fb1ba0df6367e228e0ebdaa6d3abd3c83121459 100644
--- a/src/harmony-math.js
+++ b/src/harmony-math.js
@@ -154,6 +154,26 @@ function MathHypot(x, y) {  // Function length is 2.
 }
 
 
+//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();
 
@@ -169,7 +189,10 @@ function ExtendMath() {
     "atanh", MathAtanh,
     "log10", MathLog10,
     "log2", MathLog2,
-    "hypot", MathHypot
+    "hypot", MathHypot,
+    "cbrt", MathCbrt,
+    "log1p", MathLog1p,
+    "expm1", MathExpm1
   ));
 }