49    pushq(r11);
  50 
  51    movl(c_rarg0, ThreadLocalStorage::thread_index());
  52    call(RuntimeAddress((address)TlsGetValue));
  53 
  54    popq(r11);
  55    popq(rsp);
  56    popq(r10);
  57    popq(r9);
  58    popq(r8);
  59    popq(rcx);
  60    popq(rdx);
  61    popq(rsi);
  62    popq(rdi);
  63    if (thread != rax) {
  64        movq(thread, rax);
  65        popq(rax);
  66    }
  67 }
  68 
  69 bool MacroAssembler::needs_explicit_null_check(int offset) {
  70   return offset < 0 || (int)os::vm_page_size() <= offset;






  71 }

  49    pushq(r11);
  50 
  51    movl(c_rarg0, ThreadLocalStorage::thread_index());
  52    call(RuntimeAddress((address)TlsGetValue));
  53 
  54    popq(r11);
  55    popq(rsp);
  56    popq(r10);
  57    popq(r9);
  58    popq(r8);
  59    popq(rcx);
  60    popq(rdx);
  61    popq(rsi);
  62    popq(rdi);
  63    if (thread != rax) {
  64        movq(thread, rax);
  65        popq(rax);
  66    }
  67 }
  68 
  69 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) {
  70   if (UseCompressedOops) {
  71     uintptr_t heap_base = (uintptr_t)Universe::heap_base();
  72     if ((uintptr_t)offset >= heap_base) {
  73       offset = (intptr_t)(pointer_delta((void*)offset, (void*)heap_base, 1));
  74     }
  75   }
  76   return offset < 0 || os::vm_page_size() <= offset;
  77 }