Preserves callee-saved FPU registers on ARM

runtime/vm/constants_arm.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_ARM_H_
 #define VM_CONSTANTS_ARM_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 203 matching lines @@
 
 
 // C++ ABI call registers.
 const RegList kAbiArgumentCpuRegs =
     (1 << R0) | (1 << R1) | (1 << R2) | (1 << R3);
 const RegList kAbiPreservedCpuRegs =
     (1 << R4) | (1 << R5) | (1 << R6) | (1 << R7) |
     (1 << R8) | (1 << R9) | (1 << R10);
 const int kAbiPreservedCpuRegCount = 7;
 const QRegister kAbiFirstPreservedFpuReg = Q4;
-const QRegister kAbiLastPreservedFpuReg =
-    static_cast<QRegister>(kNumberOfQRegisters - 1);
+const QRegister kAbiLastPreservedFpuReg = Q7;
+const int kAbiPreservedFpuRegCount = 4;
 
 // CPU registers available to Dart allocator.
 const RegList kDartAvailableCpuRegs =
     (1 << R0) | (1 << R1) | (1 << R2) | (1 << R3) |
     (1 << R4) | (1 << R5) | (1 << R6) | (1 << R7) | (1 << R8);
 
 // Registers available to Dart that are not preserved by runtime calls.
 const RegList kDartVolatileCpuRegs =
     kDartAvailableCpuRegs & ~kAbiPreservedCpuRegs;
 const int kDartVolatileCpuRegCount = 4;
@@ skipping 422 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM_H_