[turbofan] Change Float64Max/Float64Min to JavaScript semantics.

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index 5ccd29ef2cc86de747cab6156d9d8453dca540d1..e9f24f71e7097f8c4acf9a7685684fb2e3f52b07 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -1220,63 +1220,17 @@ void InstructionSelector::VisitFloat64Mod(Node* node) {
 }
 
 
-void InstructionSelector::VisitFloat32Max(Node* node) {
-  Mips64OperandGenerator g(this);
-  if (kArchVariant == kMips64r6) {
-    Emit(kMips64Float32Max, g.DefineAsRegister(node),
-         g.UseUniqueRegister(node->InputAt(0)),
-         g.UseUniqueRegister(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) {
   Mips64OperandGenerator g(this);
-  if (kArchVariant == kMips64r6) {
-    Emit(kMips64Float64Max, g.DefineAsRegister(node),
-         g.UseUniqueRegister(node->InputAt(0)),
-         g.UseUniqueRegister(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) {
-  Mips64OperandGenerator g(this);
-  if (kArchVariant == kMips64r6) {
-    Emit(kMips64Float32Min, g.DefineAsRegister(node),
-         g.UseUniqueRegister(node->InputAt(0)),
-         g.UseUniqueRegister(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)));
-  }
+  Emit(kMips64Float64Max, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
 
 void InstructionSelector::VisitFloat64Min(Node* node) {
   Mips64OperandGenerator g(this);
-  if (kArchVariant == kMips64r6) {
-    Emit(kMips64Float64Min, g.DefineAsRegister(node),
-         g.UseUniqueRegister(node->InputAt(0)),
-         g.UseUniqueRegister(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)));
-  }
+  Emit(kMips64Float64Min, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
 
@@ -2082,10 +2036,6 @@ InstructionSelector::SupportedMachineOperatorFlags() {
          MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
-         MachineOperatorBuilder::kFloat64Min |
-         MachineOperatorBuilder::kFloat64Max |
-         MachineOperatorBuilder::kFloat32Min |
-         MachineOperatorBuilder::kFloat32Max |
          MachineOperatorBuilder::kFloat64RoundDown |
          MachineOperatorBuilder::kFloat32RoundDown |
          MachineOperatorBuilder::kFloat64RoundUp |