X87: [turbofan] Add TruncationMode for TruncateFloat64ToInt32.

src/compiler/x87/instruction-selector-x87.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/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
@@ skipping 629 matching lines @@
 }
 
 
 void InstructionSelector::VisitTruncateFloat64ToFloat32(Node* node) {
   X87OperandGenerator g(this);
   Emit(kX87Float64ToFloat32, g.DefineAsFixed(node, stX_0),
        g.Use(node->InputAt(0)));
 }
 
 
+void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) {
+  X87OperandGenerator g(this);
+
+  switch (TruncationModeOf(node->op())) {
+    case TruncationMode::kJavaScript:
+      Emit(kArchTruncateDoubleToI, g.DefineAsRegister(node),
+           g.Use(node->InputAt(0)));
+      return;
+    case TruncationMode::kRoundToZero:
+      Emit(kX87Float64ToInt32, g.DefineAsRegister(node),
+           g.Use(node->InputAt(0)));
+      return;
+  }
+  UNREACHABLE();
+}
+
+
 void InstructionSelector::VisitFloat32Add(Node* node) {
   X87OperandGenerator g(this);
   Emit(kX87PushFloat32, g.NoOutput(), g.Use(node->InputAt(0)));
   Emit(kX87PushFloat32, g.NoOutput(), g.Use(node->InputAt(1)));
   Emit(kX87Float32Add, g.DefineAsFixed(node, stX_0), 0, NULL);
 }
 
 
 void InstructionSelector::VisitFloat64Add(Node* node) {
   X87OperandGenerator g(this);
@@ skipping 669 matching lines @@
       MachineOperatorBuilder::kFloat32Min |
       MachineOperatorBuilder::kFloat64Max |
       MachineOperatorBuilder::kFloat64Min |
       MachineOperatorBuilder::kWord32ShiftIsSafe;
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8