Add Float64Round 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_
 
 // Opcodes for control operators.
 #define INNER_CONTROL_OP_LIST(V) \
   V(Dead)                        \
@@ skipping 208 matching lines @@
   V(TruncateInt64ToInt32)     \
   V(Float64Add)               \
   V(Float64Sub)               \
   V(Float64Mul)               \
   V(Float64Div)               \
   V(Float64Mod)               \
   V(Float64Sqrt)              \
   V(Float64Equal)             \
   V(Float64LessThan)          \
   V(Float64LessThanOrEqual)   \
+  V(Float64Floor)             \
+  V(Float64Ceil)              \
+  V(Float64RoundTruncate)     \
+  V(Float64RoundTiesAway)     \
   V(LoadStackPointer)
 
 #define VALUE_OP_LIST(V) \
   COMMON_OP_LIST(V)      \
   SIMPLIFIED_OP_LIST(V)  \
   MACHINE_OP_LIST(V)     \
   JS_OP_LIST(V)
 
 // The combination of all operators at all levels and the common operators.
 #define ALL_OP_LIST(V) \
@@ skipping 79 matching lines @@
         return false;
     }
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_