MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;   SetMem16.nasm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;   SetMem16 function
  13 ;
  14 ; Notes:
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18     SECTION .text
  19
  20 ;------------------------------------------------------------------------------
  21 ;  VOID *
  22 ;  EFIAPI
  23 ;  InternalMemSetMem16 (
  24 ;    IN VOID   *Buffer,
  25 ;    IN UINTN  Count,
  26 ;    IN UINT16 Value
  27 ;    )
  28 ;------------------------------------------------------------------------------
  29 global ASM_PFX(InternalMemSetMem16)
  30 ASM_PFX(InternalMemSetMem16):
  31     push    edi
  32     mov     eax, [esp + 16]
  33     shrd    edx, eax, 16
  34     shld    eax, edx, 16
  35     mov     edx, [esp + 12]
  36     mov     edi, [esp + 8]
  37     mov     ecx, edx
  38     and     edx, 3
  39     shr     ecx, 2
  40     jz      @SetWords
  41     movd    mm0, eax
  42     movd    mm1, eax
  43     psllq   mm0, 32
  44     por     mm0, mm1
  45 .0:
  46     movq    [edi], mm0
  47     add     edi, 8
  48     loop    .0
  49 @SetWords:
  50     mov     ecx, edx
  51     rep     stosw
  52     mov     eax, [esp + 8]
  53     pop     edi
  54     ret
  55