[Qemu-devel] [Bug 600589] Re: xchg r8,rax treated as nop

[Aurelien Jarno]

** Changed in: qemu
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/600589

Title:
  xchg r8,rax treated as nop

Status in QEMU:
  Fix Released

Bug description:
  xchg r8,rax (49h 90h) executed as nop (90h) in long mode, in other
  words REX not used.

  qemu 0.12.4, host Win 7 x64,  running qemu-system-x86_64.exe.