src/cpu/x86/vm/macroAssembler_x86.cpp

*** 37,46 ****
--- 37,47 ----
  #include "runtime/interfaceSupport.hpp"
  #include "runtime/objectMonitor.hpp"
  #include "runtime/os.hpp"
  #include "runtime/sharedRuntime.hpp"
  #include "runtime/stubRoutines.hpp"
+ #include "runtime/thread.hpp"
  #include "utilities/macros.hpp"
  #if INCLUDE_ALL_GCS
  #include "gc/g1/g1CollectedHeap.inline.hpp"
  #include "gc/g1/g1SATBCardTableModRefBS.hpp"
  #include "gc/g1/heapRegion.hpp"
*** 9116,9120 ****
--- 9117,9157 ----
  }
  
  SkipIfEqual::~SkipIfEqual() {
    _masm->bind(_label);
  }
+ 
+ // 32-bit Windows has its own fast-path implementation
+ // of get_thread
+ #if !defined(WIN32) || defined(_LP64)
+ 
+ // This is simply a call to Thread::current()
+ void MacroAssembler::get_thread(Register thread) {
+   if (thread != rax) {
+     push(rax);
+   }
+   LP64_ONLY(push(rdi);)
+   LP64_ONLY(push(rsi);)
+   push(rdx);
+   push(rcx);
+   LP64_ONLY(push(r8);)
+   LP64_ONLY(push(r9);)
+   LP64_ONLY(push(r10);)
+   LP64_ONLY(push(r11);)
+ 
+   call(RuntimeAddress(CAST_FROM_FN_PTR(address, Thread::current)));
+ 
+   LP64_ONLY(pop(r11);)
+   LP64_ONLY(pop(r10);)
+   LP64_ONLY(pop(r9);)
+   LP64_ONLY(pop(r8);)
+   pop(rcx);
+   pop(rdx);
+   LP64_ONLY(pop(rsi);)
+   LP64_ONLY(pop(rdi);)
+   if (thread != rax) {
+     mov(thread, rax);
+     pop(rax);
+   }
+ }
+ 
+ #endif