[builtins] Introduce proper Float64Atan and Float64Atan2 operators.

src/compiler/instruction-codes.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_INSTRUCTION_CODES_H_
 #define V8_COMPILER_INSTRUCTION_CODES_H_
 
 #include <iosfwd>
 
 #if V8_TARGET_ARCH_ARM
@@ skipping 71 matching lines @@
   V(CheckedStoreFloat64)                  \
   V(ArchStackSlot)                        \
   V(AtomicLoadInt8)                       \
   V(AtomicLoadUint8)                      \
   V(AtomicLoadInt16)                      \
   V(AtomicLoadUint16)                     \
   V(AtomicLoadWord32)                     \
   V(AtomicStoreWord8)                     \
   V(AtomicStoreWord16)                    \
   V(AtomicStoreWord32)                    \
+  V(Ieee754Float64Atan)                   \
+  V(Ieee754Float64Atan2)                  \
   V(Ieee754Float64Log)                    \
   V(Ieee754Float64Log1p)
 
 #define ARCH_OPCODE_LIST(V)  \
   COMMON_ARCH_OPCODE_LIST(V) \
   TARGET_ARCH_OPCODE_LIST(V)
 
 enum ArchOpcode {
 #define DECLARE_ARCH_OPCODE(Name) k##Name,
   ARCH_OPCODE_LIST(DECLARE_ARCH_OPCODE)
@@ skipping 82 matching lines @@
 typedef BitField<AddressingMode, 8, 5> AddressingModeField;
 typedef BitField<FlagsMode, 13, 2> FlagsModeField;
 typedef BitField<FlagsCondition, 15, 5> FlagsConditionField;
 typedef BitField<int, 20, 12> MiscField;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_CODES_H_