MdePkg/Library/BaseLib/Ia32/ReadEflags.c

   1 /** @file
   2   AsmReadEflags 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   Reads the current value of the EFLAGS register.
  11
  12   Reads and returns the current value of the EFLAGS register. This function is
  13   only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a
  14   64-bit value on x64.
  15
  16   @return EFLAGS on IA-32 or RFLAGS on x64.
  17
  18 **/
  19 UINTN
  20 EFIAPI
  21 AsmReadEflags (
  22   VOID
  23   )
  24 {
  25   __asm {
  26     pushfd
  27     pop     eax
  28   }
  29 }