ARM: Make use of d16-d31 when available.

src/arm/assembler-arm-inl.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 40 matching lines @@
   if (CpuFeatures::IsSupported(VFP2)) {
     return kMaxNumAllocatableRegisters;
   } else {
     return kMaxNumAllocatableRegisters - kGPRsPerNonVFP2Double;
   }
 }
 
 
 int DwVfpRegister::NumRegisters() {
   if (CpuFeatures::IsSupported(VFP2)) {
-    return DwVfpRegister::kNumRegisters;
+    return CpuFeatures::IsSupported(VFP32DREGS) ? 32 : 16;
   } else {
     return 1;
   }
 }
 
 
 int DwVfpRegister::NumAllocatableRegisters() {
   if (CpuFeatures::IsSupported(VFP2)) {
-    return DwVfpRegister::kMaxNumAllocatableRegisters;
+    return NumRegisters() - kNumReservedRegisters;
   } else {
     return 1;
   }
 }
 
 
 int DwVfpRegister::ToAllocationIndex(DwVfpRegister reg) {
   ASSERT(!reg.is(kDoubleRegZero));
   ASSERT(!reg.is(kScratchDoubleReg));
+  if (reg.code() > kDoubleRegZero.code()) {
+    return reg.code() - kNumReservedRegisters;
+  }
   return reg.code();
 }
 
 
+DwVfpRegister DwVfpRegister::FromAllocationIndex(int index) {
+  ASSERT(index >= 0 && index < NumAllocatableRegisters());
+  ASSERT(kScratchDoubleReg.code() - kDoubleRegZero.code() ==
+         kNumReservedRegisters - 1);
+  if (index >= kDoubleRegZero.code()) {
+    return from_code(index + kNumReservedRegisters);
+  }
+  return from_code(index);
+}
+
+
 void RelocInfo::apply(intptr_t delta) {
   if (RelocInfo::IsInternalReference(rmode_)) {
     // absolute code pointer inside code object moves with the code object.
     int32_t* p = reinterpret_cast<int32_t*>(pc_);
     *p += delta;  // relocate entry
   }
   // We do not use pc relative addressing on ARM, so there is
   // nothing else to do.
 }
 
@@ skipping 432 matching lines @@
 
 
 void Assembler::set_target_address_at(Address pc, Address target) {
   set_target_pointer_at(pc, target);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_INL_H_