[turbofan] Unify Math.floor / Math.ceil optimization.

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 231 matching lines @@
   V(ChangeUint32ToUint64)       \
   V(TruncateFloat64ToFloat32)   \
   V(TruncateFloat64ToInt32)     \
   V(TruncateInt64ToInt32)       \
   V(Float64Add)                 \
   V(Float64Sub)                 \
   V(Float64Mul)                 \
   V(Float64Div)                 \
   V(Float64Mod)                 \
   V(Float64Sqrt)                \
-  V(Float64Floor)               \
-  V(Float64Ceil)                \
+  V(Float64RoundDown)           \
   V(Float64RoundTruncate)       \
   V(Float64RoundTiesAway)       \
   V(Float64ExtractLowWord32)    \
   V(Float64ExtractHighWord32)   \
   V(Float64InsertLowWord32)     \
   V(Float64InsertHighWord32)    \
   V(LoadStackPointer)           \
   V(CheckedLoad)                \
   V(CheckedStore)
 
@@ skipping 63 matching lines @@
            (kNumberEqual <= value && value <= kStringLessThanOrEqual) ||
            (kWord32Equal <= value && value <= kFloat64LessThanOrEqual);
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_