[turbofan] Add TruncationMode for TruncateFloat64ToInt32.

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"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
+std::ostream& operator<<(std::ostream& os, TruncationMode mode) {
+  switch (mode) {
+    case TruncationMode::kJavaScript:
+      return os << "JavaScript";
+    case TruncationMode::kRoundToZero:
+      return os << "RoundToZero";
+  }
+  UNREACHABLE();
+  return os;
+}
+
+
+TruncationMode TruncationModeOf(Operator const* op) {
+  DCHECK_EQ(IrOpcode::kTruncateFloat64ToInt32, op->opcode());
+  return OpParameter<TruncationMode>(op);
+}
+
+
 std::ostream& operator<<(std::ostream& os, WriteBarrierKind kind) {
   switch (kind) {
     case kNoWriteBarrier:
       return os << "NoWriteBarrier";
     case kFullWriteBarrier:
       return os << "FullWriteBarrier";
   }
   UNREACHABLE();
   return os;
 }
@@ skipping 85 matching lines @@
   V(Uint64LessThan, Operator::kNoProperties, 2, 0, 1)                         \
   V(Uint64LessThanOrEqual, Operator::kNoProperties, 2, 0, 1)                  \
   V(ChangeFloat32ToFloat64, Operator::kNoProperties, 1, 0, 1)                 \
   V(ChangeFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                   \
   V(ChangeFloat64ToUint32, Operator::kNoProperties, 1, 0, 1)                  \
   V(ChangeInt32ToFloat64, Operator::kNoProperties, 1, 0, 1)                   \
   V(ChangeInt32ToInt64, Operator::kNoProperties, 1, 0, 1)                     \
   V(ChangeUint32ToFloat64, Operator::kNoProperties, 1, 0, 1)                  \
   V(ChangeUint32ToUint64, Operator::kNoProperties, 1, 0, 1)                   \
   V(TruncateFloat64ToFloat32, Operator::kNoProperties, 1, 0, 1)               \
-  V(TruncateFloat64ToInt32, Operator::kNoProperties, 1, 0, 1)                 \
   V(TruncateInt64ToInt32, Operator::kNoProperties, 1, 0, 1)                   \
   V(Float32Abs, Operator::kNoProperties, 1, 0, 1)                             \
   V(Float32Add, Operator::kCommutative, 2, 0, 1)                              \
   V(Float32Sub, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float32Mul, Operator::kCommutative, 2, 0, 1)                              \
   V(Float32Div, Operator::kNoProperties, 2, 0, 1)                             \
   V(Float32Sqrt, Operator::kNoProperties, 1, 0, 1)                            \
   V(Float64Abs, Operator::kNoProperties, 1, 0, 1)                             \
   V(Float64Add, Operator::kCommutative, 2, 0, 1)                              \
   V(Float64Sub, Operator::kNoProperties, 2, 0, 1)                             \
@@ skipping 53 matching lines @@
     Name##Operator()                                                           \
         : Operator(IrOpcode::k##Name, Operator::kPure | properties, #Name,     \
                    value_input_count, 0, control_input_count, output_count, 0, \
                    0) {}                                                       \
   };                                                                           \
   Name##Operator k##Name;
   PURE_OP_LIST(PURE)
   PURE_OPTIONAL_OP_LIST(PURE)
 #undef PURE
 
+  template <TruncationMode kMode>
+  struct TruncateFloat64ToInt32Operator final
+      : public Operator1<TruncationMode> {
+    TruncateFloat64ToInt32Operator()
+        : Operator1<TruncationMode>(IrOpcode::kTruncateFloat64ToInt32,
+                                    Operator::kPure, "TruncateFloat64ToInt32",
+                                    1, 0, 0, 1, 0, 0, kMode) {}
+  };
+  TruncateFloat64ToInt32Operator<TruncationMode::kJavaScript>
+      kTruncateFloat64ToInt32JavaScript;
+  TruncateFloat64ToInt32Operator<TruncationMode::kRoundToZero>
+      kTruncateFloat64ToInt32RoundToZero;
+
 #define LOAD(Type)                                                             \
   struct Load##Type##Operator final : public Operator1<LoadRepresentation> {   \
     Load##Type##Operator()                                                     \
         : Operator1<LoadRepresentation>(                                       \
               IrOpcode::kLoad, Operator::kNoThrow | Operator::kNoWrite,        \
               "Load", 2, 1, 1, 1, 1, 0, k##Type) {}                            \
   };                                                                           \
   struct CheckedLoad##Type##Operator final                                     \
       : public Operator1<CheckedLoadRepresentation> {                          \
     CheckedLoad##Type##Operator()                                              \
@@ skipping 57 matching lines @@
 #undef PURE
 
 #define PURE(Name, properties, value_input_count, control_input_count,     \
              output_count)                                                 \
   const OptionalOperator MachineOperatorBuilder::Name() {                  \
     return OptionalOperator(flags_ & k##Name ? &cache_.k##Name : nullptr); \
   }
 PURE_OPTIONAL_OP_LIST(PURE)
 #undef PURE
 
+
+const Operator* MachineOperatorBuilder::TruncateFloat64ToInt32(
+    TruncationMode mode) {
+  switch (mode) {
+    case TruncationMode::kJavaScript:
+      return &cache_.kTruncateFloat64ToInt32JavaScript;
+    case TruncationMode::kRoundToZero:
+      return &cache_.kTruncateFloat64ToInt32RoundToZero;
+  }
+  UNREACHABLE();
+  return nullptr;
+}
+
+
 const Operator* MachineOperatorBuilder::Load(LoadRepresentation rep) {
   switch (rep) {
 #define LOAD(Type) \
   case k##Type:    \
     return &cache_.kLoad##Type;
     MACHINE_TYPE_LIST(LOAD)
 #undef LOAD
     default:
       break;
   }
@@ skipping 59 matching lines @@
   }
   // Uncached.
   return new (zone_) Operator1<CheckedStoreRepresentation>(
       IrOpcode::kCheckedStore, Operator::kNoRead | Operator::kNoThrow,
       "CheckedStore", 4, 1, 1, 0, 1, 0, rep);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8