MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem64.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 ;   SetMem64.nasm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem64 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     SECTION .text
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  EFIAPI
  29 ;  InternalMemSetMem64 (
  30 ;    IN VOID   *Buffer,
  31 ;    IN UINTN  Count,
  32 ;    IN UINT64 Value
  33 ;    )
  34 ;------------------------------------------------------------------------------
  35 global ASM_PFX(InternalMemSetMem64)
  36 ASM_PFX(InternalMemSetMem64):
  37     mov     eax, [esp + 4]              ; eax <- Buffer
  38     mov     ecx, [esp + 8]              ; ecx <- Count
  39     test    al, 8
  40     mov     edx, eax
  41     movq    xmm0, qword [esp + 12]
  42     jz      .0
  43     movq    qword [edx], xmm0
  44     add     edx, 8
  45     dec     ecx
  46 .0:
  47     shr     ecx, 1
  48     jz      @SetQwords
  49     movlhps xmm0, xmm0
  50 .1:
  51     movntdq [edx], xmm0
  52     lea     edx, [edx + 16]
  53     loop    .1
  54     mfence
  55 @SetQwords:
  56     jnc     .2
  57     movq    qword [edx], xmm0
  58 .2:
  59     ret
  60