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 32 matching lines @@
 #include "debug.h"
 
 
 namespace v8 {
 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());
+  if (index >= kDoubleRegZero.code())

[Rodolph Perfetta, 2012/12/17 14:38:30]

Do we need to assert kScratchDoubleReg.code() - kDoubleRegZero.code() ==
kNumReservedRegiters - 1 ?

Same below.

[hans, 2012/12/17 15:32:46]

Good idea! Done.

+    return from_code(index + kNumReservedRegisters);
+  return from_code(index);
+}
+
+
+const char* DwVfpRegister::AllocationIndexToString(int index) {
+  ASSERT(index >= 0 && index < NumAllocatableRegisters());
+  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.
     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_