Re-reland: Remove register index/code indirection

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 5e8abe72157f5c82931ff139997ae5fe1e927a54..c893dcad330e2708ad1c5fd7816619ad702ca18a 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -9,6 +9,7 @@
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
+#include "src/register-configuration.h"
 #include "src/runtime/runtime.h"
 
 #include "src/arm64/frames-arm64.h"
@@ -3984,14 +3985,16 @@ void MacroAssembler::PushSafepointRegisters() {
 
 void MacroAssembler::PushSafepointRegistersAndDoubles() {
   PushSafepointRegisters();
-  PushCPURegList(CPURegList(CPURegister::kFPRegister, kDRegSizeInBits,
-                            FPRegister::kAllocatableFPRegisters));
+  PushCPURegList(CPURegList(
+      CPURegister::kFPRegister, kDRegSizeInBits,
+      RegisterConfiguration::ArchDefault()->allocatable_double_codes_mask()));
 }
 
 
 void MacroAssembler::PopSafepointRegistersAndDoubles() {
-  PopCPURegList(CPURegList(CPURegister::kFPRegister, kDRegSizeInBits,
-                           FPRegister::kAllocatableFPRegisters));
+  PopCPURegList(CPURegList(
+      CPURegister::kFPRegister, kDRegSizeInBits,
+      RegisterConfiguration::ArchDefault()->allocatable_double_codes_mask()));
   PopSafepointRegisters();
 }