A64: Implement patchable inline code for InstanceOfKnownGlobal.

src/a64/macro-assembler-a64.cc

 // 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 4071 matching lines @@
 
 void MacroAssembler::JumpIfBlack(Register object,
                                  Register scratch0,
                                  Register scratch1,
                                  Label* on_black) {
   ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
   HasColor(object, scratch0, scratch1, on_black, 1, 0);  // kBlackBitPattern.
 }
 
 
+void MacroAssembler::GetRelocatedValueLocation(Register ldr_location,
+                                               Register result) {
+  ASSERT(!result.Is(ldr_location));
+  const uint32_t kLdrLitOffset_lsb = 5;
+  const uint32_t kLdrLitOffset_width = 19;
+  Ldr(result, MemOperand(ldr_location));
+  if (emit_debug_code()) {
+    And(result, result, LoadLiteralFMask);
+    Cmp(result, LoadLiteralFixed);
+    Check(eq, "The instruction to patch should be a load literal.");
+    // The instruction was clobbered. Reload it.
+    Ldr(result, MemOperand(ldr_location));
+  }
+  Sbfx(result, result, kLdrLitOffset_lsb, kLdrLitOffset_width);
+  Add(result, ldr_location, Operand(result, LSL, kWordSizeInBytesLog2));
+}
+
+
 void MacroAssembler::EnsureNotWhite(
     Register value,
     Register bitmap_scratch,
     Register shift_scratch,
     Register load_scratch,
     Register length_scratch,
     Label* value_is_white_and_not_data) {
   ASSERT(!AreAliased(
       value, bitmap_scratch, shift_scratch, load_scratch, length_scratch));
 
@@ skipping 606 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64