MIPS: [turbofan] Properly implement Float64/32 Min/Max instructions.

src/compiler/mips64/instruction-selector-mips64.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/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 651 matching lines @@
 
 
 void InstructionSelector::VisitFloat64Mod(Node* node) {
   Mips64OperandGenerator g(this);
   Emit(kMips64ModD, g.DefineAsFixed(node, f0),
        g.UseFixed(node->InputAt(0), f12),
        g.UseFixed(node->InputAt(1), f14))->MarkAsCall();
 }
 
 
-void InstructionSelector::VisitFloat32Max(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat32Max(Node* node) {
+  Mips64OperandGenerator g(this);
+  if (kArchVariant == kMips64r6) {
+    Emit(kMips64Float32Max, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+
+  } else {
+    // Reverse operands, and use same reg. for result and right operand.
+    Emit(kMips64Float32Max, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
+  }
+}
 
 
-void InstructionSelector::VisitFloat64Max(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat64Max(Node* node) {
+  Mips64OperandGenerator g(this);
+  if (kArchVariant == kMips64r6) {
+    Emit(kMips64Float64Max, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+
+  } else {
+    // Reverse operands, and use same reg. for result and right operand.
+    Emit(kMips64Float64Max, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
+  }
+}
 
 
-void InstructionSelector::VisitFloat32Min(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat32Min(Node* node) {
+  Mips64OperandGenerator g(this);
+  if (kArchVariant == kMips64r6) {
+    Emit(kMips64Float32Min, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+
+  } else {
+    // Reverse operands, and use same reg. for result and right operand.
+    Emit(kMips64Float32Min, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
+  }
+}
 
 
-void InstructionSelector::VisitFloat64Min(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat64Min(Node* node) {
+  Mips64OperandGenerator g(this);
+  if (kArchVariant == kMips64r6) {
+    Emit(kMips64Float64Min, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
+
+  } else {
+    // Reverse operands, and use same reg. for result and right operand.
+    Emit(kMips64Float64Min, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
+  }
+}
 
 
 void InstructionSelector::VisitFloat32Abs(Node* node) {
   VisitRR(this, kMips64AbsS, node);
 }
 
 
 void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitRR(this, kMips64AbsD, node);
 }
@@ skipping 592 matching lines @@
   Node* left = node->InputAt(0);
   Node* right = node->InputAt(1);
   Emit(kMips64Float64InsertHighWord32, g.DefineSameAsFirst(node),
        g.UseRegister(left), g.UseRegister(right));
 }
 
 
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
-  return MachineOperatorBuilder::kFloat64RoundDown |
+  return MachineOperatorBuilder::kFloat64Min |
+         MachineOperatorBuilder::kFloat64Max |
+         MachineOperatorBuilder::kFloat32Min |
+         MachineOperatorBuilder::kFloat32Max |
+         MachineOperatorBuilder::kFloat64RoundDown |
          MachineOperatorBuilder::kFloat64RoundTruncate;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8