[WIP] Initial CallFunctionCallback builtin.

src/arm64/macro-assembler-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/arm64/assembler-arm64.h"
@@ skipping 991 matching lines @@
   void AssertGeneratorObject(Register object, Register suspend_flags);
 
   // Abort execution if argument is not a JSBoundFunction,
   // enabled via --debug-code.
   void AssertBoundFunction(Register object);
 
   // Abort execution if argument is not undefined or an AllocationSite, enabled
   // via --debug-code.
   void AssertUndefinedOrAllocationSite(Register object, Register scratch);
 
+  // Abort if argument is not a valid API call result, enabled via --debug-code.
+  void AssertApiCallResult(Register object);
+
   // Abort execution if argument is not a positive or zero integer, enabled via
   // --debug-code.
   void AssertPositiveOrZero(Register value);
 
   void JumpIfHeapNumber(Register object, Label* on_heap_number,
                         SmiCheckType smi_check_type = DONT_DO_SMI_CHECK);
   void JumpIfNotHeapNumber(Register object, Label* on_not_heap_number,
                            SmiCheckType smi_check_type = DONT_DO_SMI_CHECK);
 
   // Sets the vs flag if the input is -0.0.
@@ skipping 1105 matching lines @@
   class RegisterBits : public BitField<unsigned, 0, 5> {};
   class DeltaBits : public BitField<uint32_t, 5, 32-5> {};
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #define ACCESS_MASM(masm) masm->
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_