ARM: Make use of d16-d31 when available.

src/arm/assembler-arm-inl.h

Index: src/arm/assembler-arm-inl.h
diff --git a/src/arm/assembler-arm-inl.h b/src/arm/assembler-arm-inl.h
index acd61feff89711daf952ae3714efc7c88a030545..d191287cc36db44222e61c3fac26cd298f583b62 100644
--- a/src/arm/assembler-arm-inl.h
+++ b/src/arm/assembler-arm-inl.h
@@ -50,10 +50,66 @@ namespace internal {
 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);
+}
+
+
+const char* DwVfpRegister::AllocationIndexToString(int index) {
+  ASSERT(index >= 0 && index < NumAllocatableRegisters());
+  ASSERT(kScratchDoubleReg.code() - kDoubleRegZero.code() ==
+         kNumReservedRegisters - 1);
+  if (index >= kDoubleRegZero.code())
+    index += kNumReservedRegisters;
+  const char* const names[] = {
+    "d0",
+    "d1",
+    "d2",
+    "d3",
+    "d4",
+    "d5",
+    "d6",
+    "d7",
+    "d8",
+    "d9",
+    "d10",
+    "d11",
+    "d12",
+    "d13",
+    "d14",
+    "d15",
+    "d16",
+    "d17",
+    "d18",
+    "d19",
+    "d20",
+    "d21",
+    "d22",
+    "d23",
+    "d24",
+    "d25",
+    "d26",
+    "d27",
+    "d28",
+    "d29",
+    "d30",
+    "d31"
+  };
+  return names[index];
+}
+
+
 void RelocInfo::apply(intptr_t delta) {
   if (RelocInfo::IsInternalReference(rmode_)) {
     // absolute code pointer inside code object moves with the code object.