684 

   684 

   685   // Initialization

   685   // Initialization

   686   static void initialize();

   686   static void initialize();

   687 

   687 

   688   // Override Abstract_VM_Version implementation

   688   // Override Abstract_VM_Version implementation

   689   static bool use_biased_locking();

   692   static bool use_biased_locking();

   690 

   693 

   691   // Asserts

   694   // Asserts

   692   static void assert_is_initialized() {

   695   static void assert_is_initialized() {

   693     assert(_cpuid_info.std_cpuid1_eax.bits.family != 0, "VM_Version not initialized");

   696     assert(_cpuid_info.std_cpuid1_eax.bits.family != 0, "VM_Version not initialized");

   928 

   931 

   929   // SSE2 and later processors implement a 'pause' instruction

   932   // SSE2 and later processors implement a 'pause' instruction

   930   // that can be used for efficient implementation of

   933   // that can be used for efficient implementation of

   931   // the intrinsic for java.lang.Thread.onSpinWait()

   934   // the intrinsic for java.lang.Thread.onSpinWait()

   932   static bool supports_on_spin_wait() { return supports_sse2(); }

   935   static bool supports_on_spin_wait() { return supports_sse2(); }

   933 };

   941 };

   934 

   942 

   935 #endif // CPU_X86_VM_VERSION_X86_HPP

   943 #endif // CPU_X86_VM_VERSION_X86_HPP