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src/hotspot/cpu/x86/assembler_x86.cpp

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*** 5477,10 ***
--- 5477,14 ---
  
  void Assembler::rdtsc() {
    emit_int16(0x0F, 0x31);
  }
  
+ void Assembler::rdtscp() {
+   emit_int24(0x0F, 0x01, (unsigned char)0xF9);
+ }
+ 
  // copies data from [esi] to [edi] using rcx pointer sized words
  // generic
  void Assembler::rep_mov() {
    // REP
    // MOVSQ
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