MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, 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 ;   SetMem16.nasm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem16 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     SECTION .text
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  EFIAPI
  29 ;  InternalMemSetMem16 (
  30 ;    IN VOID   *Buffer,
  31 ;    IN UINTN  Count,
  32 ;    IN UINT16 Value
  33 ;    )
  34 ;------------------------------------------------------------------------------
  35 global ASM_PFX(InternalMemSetMem16)
  36 ASM_PFX(InternalMemSetMem16):
  37     push    edi
  38     mov     eax, [esp + 16]
  39     shrd    edx, eax, 16
  40     shld    eax, edx, 16
  41     mov     edx, [esp + 12]
  42     mov     edi, [esp + 8]
  43     mov     ecx, edx
  44     and     edx, 3
  45     shr     ecx, 2
  46     jz      @SetWords
  47     movd    mm0, eax
  48     movd    mm1, eax
  49     psllq   mm0, 32
  50     por     mm0, mm1
  51 .0:
  52     movq    [edi], mm0
  53     add     edi, 8
  54     loop    .0
  55 @SetWords:
  56     mov     ecx, edx
  57     rep     stosw
  58     mov     eax, [esp + 8]
  59     pop     edi
  60     ret
  61