[builtins] Introduce proper Float64Atan and Float64Atan2 operators.

src/compiler/opcodes.h

 // Copyright 2013 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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 // Opcodes for control operators.
@@ skipping 179 matching lines @@
   V(NumberBitwiseOr)               \
   V(NumberBitwiseXor)              \
   V(NumberBitwiseAnd)              \
   V(NumberShiftLeft)               \
   V(NumberShiftRight)              \
   V(NumberShiftRightLogical)       \
   V(NumberImul)                    \
   V(NumberClz32)                   \
   V(NumberCeil)                    \
   V(NumberFloor)                   \
+  V(NumberAtan)                    \
+  V(NumberAtan2)                   \
   V(NumberLog)                     \
   V(NumberLog1p)                   \
   V(NumberRound)                   \
   V(NumberTrunc)                   \
   V(NumberToInt32)                 \
   V(NumberToUint32)                \
   V(NumberIsHoleNaN)               \
   V(StringFromCharCode)            \
   V(StringToNumber)                \
   V(ChangeTaggedSignedToInt32)     \
@@ skipping 139 matching lines @@
   V(Float64Add)                 \
   V(Float64Sub)                 \
   V(Float64SubPreserveNan)      \
   V(Float64Neg)                 \
   V(Float64Mul)                 \
   V(Float64Div)                 \
   V(Float64Mod)                 \
   V(Float64Max)                 \
   V(Float64Min)                 \
   V(Float64Abs)                 \
+  V(Float64Atan)                \
+  V(Float64Atan2)               \
   V(Float64Log)                 \
   V(Float64Log1p)               \
   V(Float64Sqrt)                \
   V(Float64RoundDown)           \
   V(Float32RoundUp)             \
   V(Float64RoundUp)             \
   V(Float32RoundTruncate)       \
   V(Float64RoundTruncate)       \
   V(Float64RoundTiesAway)       \
   V(Float32RoundTiesEven)       \
@@ skipping 280 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_