[builtins] Migrate a bunch of Math builtins to C++.

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 13 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 - 15.8.2.2
-function MathAcosJS(x) {
-  return %_MathAcos(+x);
-}
-
-// ECMA 262 - 15.8.2.3
-function MathAsinJS(x) {
-  return %_MathAsin(+x);
-}
-
-// ECMA 262 - 15.8.2.4
-function MathAtanJS(x) {
-  return %_MathAtan(+x);
-}
-
 // ECMA 262 - 15.8.2.5
 // The naming of y and x matches the spec, as does the order in which
 // ToNumber (valueOf) is called.
 function MathAtan2JS(y, x) {
   y = +y;
   x = +x;
-  return %_MathAtan2(y, x);
+  return %MathAtan2(y, x);
 }
 
 // ECMA 262 - 15.8.2.6
 function MathCeil(x) {
   return -%_MathFloor(-x);
 }
 
 // ECMA 262 - 15.8.2.8
 function MathExp(x) {
   return %MathExpRT(TO_NUMBER(x));
@@ skipping 34 matching lines @@
 // ECMA 262 - 15.8.2.15
 function MathRound(x) {
   return %RoundNumber(TO_NUMBER(x));
 }
 
 // ECMA 262 - 15.8.2.17
 function MathSqrtJS(x) {
   return %_MathSqrt(+x);
 }
 
-// Non-standard extension.
-function MathImul(x, y) {
-  return %NumberImul(TO_NUMBER(x), TO_NUMBER(y));
-}
-
 // ES6 draft 09-27-13, section 20.2.2.28.
 function MathSign(x) {
   x = +x;
   if (x > 0) return 1;
   if (x < 0) return -1;
   // -0, 0 or NaN.
   return x;
 }
 
 // ES6 draft 09-27-13, section 20.2.2.34.
@@ skipping 56 matching lines @@
   for (var i = 0; i < length; i++) {
     var n = arguments[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 20.2.2.16.
-function MathFroundJS(x) {
-  return %MathFround(TO_NUMBER(x));
-}
-
 // ES6 draft 07-18-14, section 20.2.2.11
 function MathClz32JS(x) {
   return %_MathClz32(x >>> 0);
 }
 
 // ES6 draft 09-27-13, section 20.2.2.9.
 // Cube root approximation, refer to: http://metamerist.com/cbrt/cbrt.htm
 // Using initial approximation adapted from Kahan's cbrt and 4 iterations
 // of Newton's method.
 function MathCbrt(x) {
@@ skipping 33 matching lines @@
   "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,
-  "acos", MathAcosJS,
-  "asin", MathAsinJS,
-  "atan", MathAtanJS,
   "ceil", MathCeil,
   "exp", MathExp,
   "floor", MathFloorJS,
   "log", MathLog,
   "round", MathRound,
   "sqrt", MathSqrtJS,
   "atan2", MathAtan2JS,
   "pow", MathPowJS,
-  "imul", MathImul,
   "sign", MathSign,
   "trunc", MathTrunc,
   "asinh", MathAsinh,
   "acosh", MathAcosh,
   "atanh", MathAtanh,
   "hypot", MathHypot,
-  "fround", MathFroundJS,
   "clz32", MathClz32JS,
   "cbrt", MathCbrt
 ]);
 
 %SetForceInlineFlag(MathAbs);
-%SetForceInlineFlag(MathAcosJS);
-%SetForceInlineFlag(MathAsinJS);
-%SetForceInlineFlag(MathAtanJS);
 %SetForceInlineFlag(MathAtan2JS);
 %SetForceInlineFlag(MathCeil);
 %SetForceInlineFlag(MathClz32JS);
 %SetForceInlineFlag(MathFloorJS);
 %SetForceInlineFlag(MathRandom);
 %SetForceInlineFlag(MathSign);
 %SetForceInlineFlag(MathSqrtJS);
 %SetForceInlineFlag(MathTrunc);
 
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.MathAbs = MathAbs;
   to.MathExp = MathExp;
   to.MathFloor = MathFloorJS;
   to.IntRandom = MathRandomRaw;
 });
 
 })