Fix math min/max for -0.0 case. Enable min_max_test to run in optimizing compiler as well.

runtime/vm/constants_mips.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_CONSTANTS_MIPS_H_
 #define VM_CONSTANTS_MIPS_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 137 matching lines @@
   D10 = 10,  // Preserved.
   D11 = 11,  // Preserved.
   D12 = 12,  // Preserved.
   D13 = 13,  // Preserved.
   D14 = 14,  // Preserved.
   D15 = 15,  // Preserved.
   kNumberOfDRegisters = 16,
   kNoDRegister = -1,
 };
 
+static inline FRegister EvenFRegisterOf(DRegister d) {
+  return static_cast<FRegister>(d * 2);
+}
+
+static inline FRegister OddFRegisterOf(DRegister d) {
+  return static_cast<FRegister>((d * 2) + 1);
+}
+
 const DRegister DTMP = D9;
 const FRegister STMP1 = F18;
 const FRegister STMP2 = F19;
 
 // Architecture independent aliases.
 typedef DRegister FpuRegister;
 const FpuRegister FpuTMP = DTMP;
 const int kNumberOfFpuRegisters = kNumberOfDRegisters;
 const FpuRegister kNoFpuRegister = kNoDRegister;
 
@@ skipping 423 matching lines @@
 #endif  // defined(DEBUG)
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_MIPS_H_