[builtins] Introduce proper Float64Log1p operator.

src/compiler/raw-machine-assembler.h

 // Copyright 2014 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_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 443 matching lines @@
   }
   Node* Float64Max(Node* a, Node* b) {
     return AddNode(machine()->Float64Max().op(), a, b);
   }
   Node* Float64Min(Node* a, Node* b) {
     return AddNode(machine()->Float64Min().op(), a, b);
   }
   Node* Float64Abs(Node* a) { return AddNode(machine()->Float64Abs(), a); }
   Node* Float64Neg(Node* a) { return Float64Sub(Float64Constant(-0.0), a); }
   Node* Float64Log(Node* a) { return AddNode(machine()->Float64Log(), a); }
+  Node* Float64Log1p(Node* a) { return AddNode(machine()->Float64Log1p(), a); }
   Node* Float64Sqrt(Node* a) { return AddNode(machine()->Float64Sqrt(), a); }
   Node* Float64Equal(Node* a, Node* b) {
     return AddNode(machine()->Float64Equal(), a, b);
   }
   Node* Float64NotEqual(Node* a, Node* b) {
     return Word32BinaryNot(Float64Equal(a, b));
   }
   Node* Float64LessThan(Node* a, Node* b) {
     return AddNode(machine()->Float64LessThan(), a, b);
   }
@@ skipping 297 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_