[WIP] Initial CallFunctionCallback builtin.

src/arm64/macro-assembler-arm64.cc

 // 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/assembler.h"
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 1670 matching lines @@
     Label done_checking;
     AssertNotSmi(object);
     JumpIfRoot(object, Heap::kUndefinedValueRootIndex, &done_checking);
     Ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
     CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex);
     Assert(eq, kExpectedUndefinedOrCell);
     Bind(&done_checking);
   }
 }
 
+void MacroAssembler::AssertApiCallResult(Register object) {
+  if (emit_debug_code()) {
+    Label done_checking;
+    Push(object);
+
+    // Check for Smis.
+    JumpIfSmi(object, &done_checking);
+
+    // Check for valid Oddballs.
+    JumpIfRoot(object, Heap::kTrueValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kFalseValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kNullValueRootIndex, &done_checking);
+    JumpIfRoot(object, Heap::kUndefinedValueRootIndex, &done_checking);
+
+    // Check for other primitives (String, Symbol and HeapNumber).
+    STATIC_ASSERT(LAST_PRIMITIVE_TYPE == ODDBALL_TYPE);
+    CompareObjectType(object, object, object, LAST_PRIMITIVE_TYPE);
+    B(lo, &done_checking);
+
+    // Check for JSReceivers.
+    Cmp(object, FIRST_JS_RECEIVER_TYPE);
+    Check(hs, kAPICallReturnedInvalidObject);
+
+    Bind(&done_checking);
+    Pop(object);
+  }
+}
 
 void MacroAssembler::AssertPositiveOrZero(Register value) {
   if (emit_debug_code()) {
     Label done;
     int sign_bit = value.Is64Bits() ? kXSignBit : kWSignBit;
     Tbz(value, sign_bit, &done);
     Abort(kUnexpectedNegativeValue);
     Bind(&done);
   }
 }
@@ skipping 2909 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64