Add Float64Round operator.

src/compiler/machine-operator.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/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 
@@ skipping 163 matching lines @@
   };                                                                          \
   struct Store##Type##FullWriteBarrier##Operator FINAL                        \
       : public Store##Type##Operator {                                        \
     Store##Type##FullWriteBarrier##Operator()                                 \
         : Store##Type##Operator(kFullWriteBarrier) {}                         \
   };                                                                          \
   Store##Type##NoWriteBarrier##Operator k##Store##Type##NoWriteBarrier;       \
   Store##Type##FullWriteBarrier##Operator k##Store##Type##FullWriteBarrier;
   MACHINE_TYPE_LIST(STORE)
 #undef STORE
+
+  struct Float64RoundOperator FINAL : public Operator1<Float64RoundMode> {
+    explicit Float64RoundOperator(Float64RoundMode mode)
+        : Operator1(IrOpcode::kFloat64Round, Operator::kPure, 1, 1,
+                    "Float64Round", mode) {}
+  };
+  Float64RoundOperator kFloat64RoundDown;
+  Float64RoundOperator kFloat64RoundUp;
+  Float64RoundOperator kFloat64RoundAway;
+  Float64RoundOperator kFloat64RoundTowards;
+
+  MachineOperatorBuilderImpl()
+      : kFloat64RoundDown(kRoundDown),
+        kFloat64RoundUp(kRoundUp),
+        kFloat64RoundAway(kRoundAway),
+        kFloat64RoundTowards(kRoundTowards) {}
 };
 
 
 static base::LazyInstance<MachineOperatorBuilderImpl>::type kImpl =
     LAZY_INSTANCE_INITIALIZER;
 
 
-MachineOperatorBuilder::MachineOperatorBuilder(MachineType word)
-    : impl_(kImpl.Get()), word_(word) {
+MachineOperatorBuilder::MachineOperatorBuilder(
+    MachineType word, SupportedOperators supportedOperators)
+    : impl_(kImpl.Get()), word_(word), supportedOperators_(supportedOperators) {
   DCHECK(word == kRepWord32 || word == kRepWord64);
 }
 
 
 #define PURE(Name, properties, input_count, output_count) \
   const Operator* MachineOperatorBuilder::Name() { return &impl_.k##Name; }
 PURE_OP_LIST(PURE)
 #undef PURE
 
 
@@ skipping 27 matching lines @@
     MACHINE_TYPE_LIST(STORE)
 #undef STORE
 
     default:
       break;
   }
   UNREACHABLE();
   return NULL;
 }
 
+
+const Operator* MachineOperatorBuilder::Float64Round(Float64RoundMode mode) {
+  switch (mode) {
+    case kRoundDown:
+      DCHECK(HasFloat64Floor());
+      return &impl_.kFloat64RoundDown;
+    case kRoundUp:
+      DCHECK(HasFloat64Ceil());
+      return &impl_.kFloat64RoundUp;
+    case kRoundAway:
+      DCHECK(HasFloat64RoundTiesAway());
+      return &impl_.kFloat64RoundAway;
+    case kRoundTowards:
+      DCHECK(HasFloat64RoundTiesTowards());
+      return &impl_.kFloat64RoundTowards;
+  }
+  UNREACHABLE();
+  return NULL;
+}
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8