[turbofan] Introduce optional Float64Min and Float64Max machine operators.

src/compiler/x64/instruction-selector-x64.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 <algorithm>
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 882 matching lines @@
 
 void InstructionSelector::VisitFloat64Mod(Node* node) {
   X64OperandGenerator g(this);
   InstructionOperand temps[] = {g.TempRegister(rax)};
   Emit(kSSEFloat64Mod, g.DefineSameAsFirst(node),
        g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)), 1,
        temps);
 }
 
 
+void InstructionSelector::VisitFloat64Max(Node* node) {
+  X64OperandGenerator g(this);
+  if (IsSupported(AVX)) {
+    Emit(kAVXFloat64Max, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
+  } else {
+    Emit(kSSEFloat64Max, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
+  }
+}
+
+
+void InstructionSelector::VisitFloat64Min(Node* node) {
+  X64OperandGenerator g(this);
+  if (IsSupported(AVX)) {
+    Emit(kAVXFloat64Min, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
+  } else {
+    Emit(kSSEFloat64Min, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
+  }
+}
+
+
 void InstructionSelector::VisitFloat64Sqrt(Node* node) {
   X64OperandGenerator g(this);
   Emit(kSSEFloat64Sqrt, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 
 namespace {
 
 void VisitRRFloat64(InstructionSelector* selector, InstructionCode opcode,
                     Node* node) {
@@ skipping 529 matching lines @@
   Node* right = node->InputAt(1);
   Emit(kSSEFloat64InsertHighWord32, g.DefineSameAsFirst(node),
        g.UseRegister(left), g.Use(right));
 }
 
 
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
+      MachineOperatorBuilder::kFloat64Max |
+      MachineOperatorBuilder::kFloat64Min |
       MachineOperatorBuilder::kWord32ShiftIsSafe;
   if (CpuFeatures::IsSupported(SSE4_1)) {
     flags |= MachineOperatorBuilder::kFloat64RoundDown |
              MachineOperatorBuilder::kFloat64RoundTruncate;
   }
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8