[builtins] Introduce proper Float64Log1p operator.

src/objects.h

 // Copyright 2015 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 6569 matching lines @@
   V(String.prototype, concat, StringConcat)                 \
   V(String.prototype, toLowerCase, StringToLowerCase)       \
   V(String.prototype, toUpperCase, StringToUpperCase)       \
   V(String, fromCharCode, StringFromCharCode)               \
   V(Math, random, MathRandom)                               \
   V(Math, floor, MathFloor)                                 \
   V(Math, round, MathRound)                                 \
   V(Math, ceil, MathCeil)                                   \
   V(Math, abs, MathAbs)                                     \
   V(Math, log, MathLog)                                     \
+  V(Math, log1p, MathLog1p)                                 \
   V(Math, exp, MathExp)                                     \
   V(Math, sqrt, MathSqrt)                                   \
   V(Math, pow, MathPow)                                     \
   V(Math, max, MathMax)                                     \
   V(Math, min, MathMin)                                     \
   V(Math, cos, MathCos)                                     \
   V(Math, sin, MathSin)                                     \
   V(Math, tan, MathTan)                                     \
   V(Math, acos, MathAcos)                                   \
   V(Math, asin, MathAsin)                                   \
@@ skipping 4197 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_