MIPS64: [turbofan] Support Float64Min and Float64Max.

src/compiler/mips/instruction-selector-mips.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 1041 matching lines @@
   Node* right = node->InputAt(1);
   Emit(kMipsFloat64InsertHighWord32, g.DefineSameAsFirst(node),
        g.UseRegister(left), g.UseRegister(right));
 }
 
 
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags = MachineOperatorBuilder::kNoFlags;
+  if (IsMipsArchVariant(kMips32r6)) {
+    flags |= MachineOperatorBuilder::kFloat32Max |
+             MachineOperatorBuilder::kFloat32Min |
+             MachineOperatorBuilder::kFloat64Max |
+             MachineOperatorBuilder::kFloat64Min;
+  }
   if ((IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) &&

[paul.l..., 2015/05/15 19:07:48]

You also need to provide implementations for the 4 visitor functions:
InstructionSelector::VisitFloat32Max() ... VisitFloat64Min(). They are currently
UNREACHABLE().

[balazs.kilvady, 2015/05/18 12:24:00]

Done.

       IsFp64Mode()) {
     flags |= MachineOperatorBuilder::kFloat64RoundDown |
              MachineOperatorBuilder::kFloat64RoundTruncate;
   }
   return flags;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8