EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.S

   1 #
   2 # ConvertAsm.py: Automatically generated from CompareMem.asm
   3 #
   4 #------------------------------------------------------------------------------
   5 #
   6 # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
   7 # This program and the accompanying materials
   8 # are licensed and made available under the terms and conditions of the BSD License
   9 # which accompanies this distribution.  The full text of the license may be found at
  10 # http://opensource.org/licenses/bsd-license.php
  11 #
  12 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14 #
  15 # Module Name:
  16 #
  17 #   CompareMem.S
  18 #
  19 # Abstract:
  20 #
  21 #   CompareMem function
  22 #
  23 # Notes:
  24 #
  25 #   The following BaseMemoryLib instances share the same version of this file:
  26 #
  27 #       BaseMemoryLibRepStr
  28 #       BaseMemoryLibMmx
  29 #       BaseMemoryLibSse2
  30 #
  31 #------------------------------------------------------------------------------
  32
  33 #include <EdkIIGlueBase.h>
  34 #------------------------------------------------------------------------------
  35 # INTN
  36 # EFIAPI
  37 # InternalMemCompareMem (
  38 #   IN      CONST VOID                *DestinationBuffer,
  39 #   IN      CONST VOID                *SourceBuffer,
  40 #   IN      UINTN                     Length
  41 #   );
  42 #------------------------------------------------------------------------------
  43 .globl ASM_PFX(InternalMemCompareMem)
  44 ASM_PFX(InternalMemCompareMem):
  45     pushq   %rsi
  46     pushq   %rdi
  47     movq    %rcx, %rsi
  48     movq    %rdx, %rdi
  49     movq    %r8, %rcx
  50     repe    cmpsb
  51     movzbq  -1(%rsi) , %rax
  52     movzbq  -1(%rdi) , %rdx
  53     subq    %rdx, %rax
  54     popq    %rdi
  55     popq    %rsi
  56     ret
  57