MdePkg/Library/BaseLib/Ia32/Mwait.c


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/** @file
  AsmMwait function

  Copyright (c) 2006 - 2007, Intel Corporation<BR>
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

UINTN
EFIAPI
AsmMwait (
  IN      UINTN                     RegisterEax,
  IN      UINTN                     RegisterEcx
  )
{
  _asm {
    mov     eax, RegisterEax
    mov     ecx, RegisterEcx
    _emit   0x0f              // mwait
    _emit   0x01
    _emit   0xC9
  }
}