Intrinsify UserTag operations on all architectures

runtime/vm/intrinsifier_x64.cc

 // Copyright (c) 2013, 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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1629 matching lines @@
 
 void Intrinsifier::OneByteString_equality(Assembler* assembler) {
   StringEquality(assembler, kOneByteStringCid);
 }
 
 
 void Intrinsifier::TwoByteString_equality(Assembler* assembler) {
   StringEquality(assembler, kTwoByteStringCid);
 }
 
+
+// On stack: user tag (+1), return-address (+0).
+void Intrinsifier::UserTag_makeCurrent(Assembler* assembler) {
+  // RBX: Isolate.
+  Isolate* isolate = Isolate::Current();
+  const Immediate& isolate_address =
+      Immediate(reinterpret_cast<int64_t>(isolate));
+  __ movq(RBX, isolate_address);
+  // RAX: UserTag.
+  __ movq(RAX, Address(RSP, + 1 * kWordSize));
+  // Set Isolate::current_tag_.
+  __ movq(Address(RBX, Isolate::current_tag_offset()), RAX);
+  // RAX: UserTag's tag.
+  __ movq(RAX, FieldAddress(RAX, UserTag::tag_offset()));
+  // Set Isolate::user_tag_.
+  __ movq(Address(RBX, Isolate::user_tag_offset()), RAX);
+  // Set return value.
+  __ LoadObject(RAX, Object::null_object(), PP);
+  __ ret();
+}
+
+
+void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
+  // RBX: Isolate.
+  Isolate* isolate = Isolate::Current();
+  const Immediate& isolate_address =
+      Immediate(reinterpret_cast<int64_t>(isolate));
+  __ movq(RBX, isolate_address);
+  // Set return value to Isolate::current_tag_.
+  __ movq(RAX, Address(RBX, Isolate::current_tag_offset()));
+  __ ret();
+}
+
+
+void Intrinsifier::Profiler_clearCurrentTag(Assembler* assembler) {
+  // RBX: Isolate.
+  Isolate* isolate = Isolate::Current();
+  const Immediate& isolate_address =
+      Immediate(reinterpret_cast<int64_t>(isolate));
+  __ movq(RBX, isolate_address);
+  // Set return value to Isolate::current_tag_.
+  __ movq(RAX, Address(RBX, Isolate::current_tag_offset()));
+  // Clear Isolate::current_tag_.
+  __ LoadObject(RCX, Object::null_object(), PP);
+  __ movq(Address(RBX, Isolate::current_tag_offset()), RCX);
+  // Clear Isolate::user_tag_.
+  __ movq(Address(RBX, Isolate::user_tag_offset()), Immediate(0));
+  __ ret();
+}
+
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64