[turbofan] Change Float64Max/Float64Min to JavaScript semantics.

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

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index be0a234874a1aa2b23f09b909623a3748bc302db..8e5744cb1fe1362fda439202ccedca5519c53e4c 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -814,63 +814,17 @@ void InstructionSelector::VisitFloat64Mod(Node* node) {
 }
 
 
-void InstructionSelector::VisitFloat32Max(Node* node) {
-  MipsOperandGenerator g(this);
-  if (IsMipsArchVariant(kMips32r6)) {
-    Emit(kMipsFloat32Max, 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(kMipsFloat32Max, g.DefineSameAsFirst(node),
-         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
-  }
-}
-
-
 void InstructionSelector::VisitFloat64Max(Node* node) {
   MipsOperandGenerator g(this);
-  if (IsMipsArchVariant(kMips32r6)) {
-    Emit(kMipsFloat64Max, 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(kMipsFloat64Max, g.DefineSameAsFirst(node),
-         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
-  }
-}
-
-
-void InstructionSelector::VisitFloat32Min(Node* node) {
-  MipsOperandGenerator g(this);
-  if (IsMipsArchVariant(kMips32r6)) {
-    Emit(kMipsFloat32Min, 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(kMipsFloat32Min, g.DefineSameAsFirst(node),
-         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
-  }
+  Emit(kMipsFloat64Max, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
 
 void InstructionSelector::VisitFloat64Min(Node* node) {
   MipsOperandGenerator g(this);
-  if (IsMipsArchVariant(kMips32r6)) {
-    Emit(kMipsFloat64Min, 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(kMipsFloat64Min, g.DefineSameAsFirst(node),
-         g.UseRegister(node->InputAt(1)), g.UseRegister(node->InputAt(0)));
-  }
+  Emit(kMipsFloat64Min, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
 
@@ -1582,10 +1536,6 @@ InstructionSelector::SupportedMachineOperatorFlags() {
          MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kWord32ShiftIsSafe |
-         MachineOperatorBuilder::kFloat64Min |
-         MachineOperatorBuilder::kFloat64Max |
-         MachineOperatorBuilder::kFloat32Min |
-         MachineOperatorBuilder::kFloat32Max |
          MachineOperatorBuilder::kFloat32RoundDown |
          MachineOperatorBuilder::kFloat32RoundUp |
          MachineOperatorBuilder::kFloat32RoundTruncate |