MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem32.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   4 # This program and the accompanying materials
   5 # are licensed and made available under the terms and conditions of the BSD License
   6 # which accompanies this distribution.  The full text of the license may be found at
   7 # http://opensource.org/licenses/bsd-license.php.
   8 #
   9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #
  12 # Module Name:
  13 #
  14 #   SetMem32.asm
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem32 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 ASM_GLOBAL ASM_PFX(InternalMemSetMem32)
  25
  26 #------------------------------------------------------------------------------
  27 #  VOID *
  28 #  EFIAPI
  29 #  InternalMemSetMem32 (
  30 #    IN VOID   *Buffer,
  31 #    IN UINTN  Count,
  32 #    IN UINT32 Value
  33 #    );
  34 #------------------------------------------------------------------------------
  35 ASM_PFX(InternalMemSetMem32):
  36     push    %edi
  37     movl    12(%esp), %edx
  38     movl    8(%esp), %edi
  39     xorl    %ecx, %ecx
  40     subl    %edi, %ecx
  41     andl    $15, %ecx                   # ecx + edi aligns on 16-byte boundary
  42     movl    16(%esp), %eax
  43     jz      L0
  44     shrl    $2, %ecx
  45     cmpl    %edx, %ecx
  46     cmova   %edx, %ecx
  47     subl    %ecx, %edx
  48     rep
  49     stosl
  50 L0:
  51     movl    %edx, %ecx
  52     andl    $3, %edx
  53     shrl    $2, %ecx
  54     jz      L_SetDwords
  55     movd    %eax, %xmm0
  56     pshufd  $0, %xmm0, %xmm0
  57 L1:
  58     movntdq %xmm0, (%edi)
  59     addl    $16, %edi
  60     loop    L1
  61     mfence
  62 L_SetDwords:
  63     movl    %edx, %ecx
  64     rep
  65     stosl
  66     movl    8(%esp), %eax
  67     pop     %edi
  68     ret