Intrinsic version of Object.runtimeType

runtime/vm/intrinsifier_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1628 matching lines @@
   __ ldr(R0, Address(SP, 0 * kWordSize));
   __ ldr(R1, Address(SP, 1 * kWordSize));
   __ cmp(R0, Operand(R1));
   __ LoadObject(R0, Bool::False(), PP);
   __ LoadObject(TMP, Bool::True(), PP);
   __ csel(R0, TMP, R0, EQ);
   __ ret();
 }
 
 
+// Return type quickly for simple types (not parameterized and not signature).
+void Intrinsifier::ObjectRuntimeType(Assembler* assembler) {
+  Label fall_through;
+  __ ldr(R0, Address(SP, 0 * kWordSize));
+  __ LoadClassIdMayBeSmi(R1, R0);
+  __ LoadClassById(R2, R1, PP);
+  // R2: class of instance (R0).
+  __ ldr(R3, FieldAddress(R2, Class::signature_function_offset()));
+  __ CompareObject(R3, Object::null_object(), PP);
+  __ b(&fall_through, NE);
+
+  __ ldr(R3, FieldAddress(R2, Class::num_type_arguments_offset()), kHalfword);
+  __ CompareImmediate(R3, 0, kNoPP);
+  __ b(&fall_through, NE);
+
+  __ ldr(R0, FieldAddress(R2, Class::canonical_types_offset()));
+  __ CompareObject(R0, Object::null_object(), PP);
+  __ b(&fall_through, EQ);
+  __ ret();
+
+  __ Bind(&fall_through);
+}
+
+
 void Intrinsifier::String_getHashCode(Assembler* assembler) {
   Label fall_through;
   __ ldr(R0, Address(SP, 0 * kWordSize));
   __ ldr(R0, FieldAddress(R0, String::hash_offset()));
   __ CompareRegisters(R0, ZR);
   __ b(&fall_through, EQ);
   __ ret();
   // Hash not yet computed.
   __ Bind(&fall_through);
 }
@@ skipping 450 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(R1, reinterpret_cast<uword>(isolate), kNoPP);
   // Set return value to Isolate::current_tag_.
   __ ldr(R0, Address(R1, Isolate::current_tag_offset()));
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64