MdePkg/Library/BaseLib/Ia32/WriteMm1.c

   1 /** @file
   2   AsmWriteMm1 function
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9
  10
  11
  12 /**
  13   Writes the current value of 64-bit MMX Register #1 (MM1).
  14
  15   Writes the current value of MM1. This function is only available on IA32 and
  16   x64.
  17
  18   @param  Value The 64-bit value to write to MM1.
  19
  20 **/
  21 VOID
  22 EFIAPI
  23 AsmWriteMm1 (
  24   IN UINT64   Value
  25   )
  26 {
  27   _asm {
  28     movq    mm1, qword ptr [Value]
  29     emms
  30   }
  31 }
  32