[builtins] Introduce proper Float64Exp operator.

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 185 matching lines @@
   V(NumberShiftLeft)                  \
   V(NumberShiftRight)                 \
   V(NumberShiftRightLogical)          \
   V(NumberImul)                       \
   V(NumberClz32)                      \
   V(NumberCeil)                       \
   V(NumberFloor)                      \
   V(NumberFround)                     \
   V(NumberAtan)                       \
   V(NumberAtan2)                      \
+  V(NumberExp)                        \
   V(NumberLog)                        \
   V(NumberLog1p)                      \
   V(NumberLog2)                       \
   V(NumberLog10)                      \
   V(NumberRound)                      \
   V(NumberSqrt)                       \
   V(NumberTrunc)                      \
   V(NumberToInt32)                    \
   V(NumberToUint32)                   \
   V(NumberSilenceNaN)                 \
@@ skipping 148 matching lines @@
   V(Float64SubPreserveNan)      \
   V(Float64Neg)                 \
   V(Float64Mul)                 \
   V(Float64Div)                 \
   V(Float64Mod)                 \
   V(Float64Max)                 \
   V(Float64Min)                 \
   V(Float64Abs)                 \
   V(Float64Atan)                \
   V(Float64Atan2)               \
+  V(Float64Exp)                 \
   V(Float64Log)                 \
   V(Float64Log1p)               \
   V(Float64Log2)                \
   V(Float64Log10)               \
   V(Float64Sqrt)                \
   V(Float64RoundDown)           \
   V(Float32RoundUp)             \
   V(Float64RoundUp)             \
   V(Float32RoundTruncate)       \
   V(Float64RoundTruncate)       \
@@ skipping 282 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_