[turbofan] Introduce Float64Pow and NumberPow operators.

src/js/math.js

 // Copyright 2012 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.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
@@ skipping 11 matching lines @@
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 
 //-------------------------------------------------------------------
 
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   x = +x;
   return (x > 0) ? x : 0 - x;
 }
 
-// ECMA 262 - 15.8.2.13
-function MathPowJS(x, y) {
-  return %_MathPow(TO_NUMBER(x), TO_NUMBER(y));
-}
-
 // ECMA 262 - 15.8.2.14
 function MathRandom() {
   // While creating a startup snapshot, %GenerateRandomNumbers returns a
   // normal array containing a single random number, and has to be called for
   // every new random number.
   // Otherwise, it returns a pre-populated typed array of random numbers. The
   // first two elements are reserved for the PRNG state.
   if (nextRandomIndex <= kRandomNumberStart) {
     randomNumbers = %GenerateRandomNumbers(randomNumbers);
     if (%_IsTypedArray(randomNumbers)) {
@@ skipping 65 matching lines @@
     var summand = n * n - compensation;
     var preliminary = sum + summand;
     compensation = (preliminary - sum) - summand;
     sum = preliminary;
   }
   return %math_sqrt(sum) * max;
 }
 
 // -------------------------------------------------------------------
 
-%InstallToContext([
-  "math_pow", MathPowJS,
-]);
-
 %AddNamedProperty(GlobalMath, toStringTagSymbol, "Math", READ_ONLY | DONT_ENUM);
 
 // Set up math constants.
 utils.InstallConstants(GlobalMath, [
   "PI", 3.1415926535897932,
   "SQRT1_2", 0.7071067811865476,
   "SQRT2", 1.4142135623730951
 ]);
 
 // Set up non-enumerable functions of the Math object and
 // set their names.
 utils.InstallFunctions(GlobalMath, DONT_ENUM, [
   "random", MathRandom,
   "abs", MathAbs,
-  "pow", MathPowJS,
   "sign", MathSign,
   "asinh", MathAsinh,
   "acosh", MathAcosh,
   "hypot", MathHypot,
 ]);
 
 %SetForceInlineFlag(MathRandom);
 %SetForceInlineFlag(MathSign);
 
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.IntRandom = MathRandomRaw;
 });
 
 })