Add Float64Round operator.

test/unittests/compiler/machine-operator-unittest.cc

 // 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.
 
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/operator-properties-inl.h"
 #include "testing/gtest-support.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 184 matching lines @@
     PURE(Int64LessThanOrEqual, 2, 1),     PURE(Uint64LessThan, 2, 1),
     PURE(ChangeFloat32ToFloat64, 1, 1),   PURE(ChangeFloat64ToInt32, 1, 1),
     PURE(ChangeFloat64ToUint32, 1, 1),    PURE(ChangeInt32ToInt64, 1, 1),
     PURE(ChangeUint32ToFloat64, 1, 1),    PURE(ChangeUint32ToUint64, 1, 1),
     PURE(TruncateFloat64ToFloat32, 1, 1), PURE(TruncateFloat64ToInt32, 1, 1),
     PURE(TruncateInt64ToInt32, 1, 1),     PURE(Float64Add, 2, 1),
     PURE(Float64Sub, 2, 1),               PURE(Float64Mul, 2, 1),
     PURE(Float64Div, 2, 1),               PURE(Float64Mod, 2, 1),
     PURE(Float64Sqrt, 1, 1),              PURE(Float64Equal, 2, 1),
     PURE(Float64LessThan, 2, 1),          PURE(Float64LessThanOrEqual, 2, 1),
-    PURE(LoadStackPointer, 0, 1)
+    PURE(LoadStackPointer, 0, 1),         PURE(Float64Floor, 1, 1),
+    PURE(Float64Ceil, 1, 1),              PURE(Float64RoundTruncate, 1, 1),
+    PURE(Float64RoundTiesAway, 1, 1),
 #undef PURE
 };
 
 
 typedef MachineOperatorTestWithParam<PureOperator> MachinePureOperatorTest;
 
 }  // namespace
 
 
 TEST_P(MachinePureOperatorTest, InstancesAreGloballyShared) {
@@ skipping 88 matching lines @@
   EXPECT_EQ(machine.Uint64Div(), machine.UintDiv());
   EXPECT_EQ(machine.Int64Mod(), machine.IntMod());
   EXPECT_EQ(machine.Uint64Mod(), machine.UintMod());
   EXPECT_EQ(machine.Int64LessThan(), machine.IntLessThan());
   EXPECT_EQ(machine.Int64LessThanOrEqual(), machine.IntLessThanOrEqual());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8