A64: Synchronize with r17104.

src/a64/macro-assembler-a64.h

 // Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 920 matching lines @@
   // handler chain. Register value must be x0.
   void ThrowUncatchable(Register value,
                         Register scratch1,
                         Register scratch2,
                         Register scratch3,
                         Register scratch4);
 
   void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None());
   void TailCallStub(CodeStub* stub);
 
-  void CallRuntime(const Runtime::Function* f, int num_arguments);
-  void CallRuntime(Runtime::FunctionId fid, int num_arguments);
+  void CallRuntime(const Runtime::Function* f,
+                   int num_arguments,
+                   SaveFPRegsMode save_doubles = kDontSaveFPRegs);
+
+  void CallRuntime(Runtime::FunctionId id, int num_arguments) {
+    CallRuntime(Runtime::FunctionForId(id), num_arguments);
+  }
+
+  // TODO(all): Why does this variant save FP regs by default?
+  void CallRuntimeSaveDoubles(Runtime::FunctionId id) {
+    const Runtime::Function* function = Runtime::FunctionForId(id);
+    CallRuntime(function, function->nargs, kSaveFPRegs);
+  }
+
   void TailCallRuntime(Runtime::FunctionId fid,
                        int num_arguments,
                        int result_size);
-  void CallRuntimeSaveDoubles(Runtime::FunctionId id);
 
   int ActivationFrameAlignment();
 
   // Calls a C function.
   // The called function is not allowed to trigger a
   // garbage collection, since that might move the code and invalidate the
   // return address (unless this is somehow accounted for by the called
   // function).
   void CallCFunction(ExternalReference function,
                      int num_reg_arguments);
@@ skipping 1190 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_A64_MACRO_ASSEMBLER_A64_H_