src/hotspot/cpu/sparc/macroAssembler_sparc.cpp

rev 47591 : Add Thread Local handshakes and thread local polling

*** 35,44 ****
--- 35,46 ----
  #include "prims/methodHandles.hpp"
  #include "runtime/biasedLocking.hpp"
  #include "runtime/interfaceSupport.hpp"
  #include "runtime/objectMonitor.hpp"
  #include "runtime/os.inline.hpp"
+ #include "runtime/safepoint.hpp"
+ #include "runtime/safepointMechanism.hpp"
  #include "runtime/sharedRuntime.hpp"
  #include "runtime/stubRoutines.hpp"
  #include "utilities/align.hpp"
  #include "utilities/macros.hpp"
  #if INCLUDE_ALL_GCS
*** 234,243 ****
--- 236,259 ----
    set(os::get_memory_serialize_page(), tmp1);
    st(G0, tmp1, tmp2);
  }
  
  
+ void MacroAssembler::safepoint_poll(Label& slow_path, bool a, Register thread_reg, Register temp_reg) {
+   if (SafepointMechanism::uses_thread_local_poll()) {
+     ldx(Address(thread_reg, Thread::polling_page_offset()), temp_reg, 0);
+     // Armed page has poll bit set.
+     and3(temp_reg, SafepointMechanism::poll_bit(), temp_reg);
+     br_notnull(temp_reg, a, Assembler::pn, slow_path);
+   } else {
+     AddressLiteral sync_state(SafepointSynchronize::address_of_state());
+ 
+     load_contents(sync_state, temp_reg);
+     cmp(temp_reg, SafepointSynchronize::_not_synchronized);
+     br(Assembler::notEqual, a, Assembler::pn, slow_path);
+   }
+ }
  
  void MacroAssembler::enter() {
    Unimplemented();
  }