MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.asm

   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.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem64 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  InternalMemSetMem64 (
  29 ;    IN VOID   *Buffer,
  30 ;    IN UINTN  Count,
  31 ;    IN UINT64 Value
  32 ;    )
  33 ;------------------------------------------------------------------------------
  34 InternalMemSetMem64 PROC
  35     mov     rax, rcx                    ; rax <- Buffer
  36     xchg    rcx, rdx                    ; rcx <- Count & rdx <- Buffer
  37     test    dl, 8
  38     movd    xmm0, r8
  39     jz      @F
  40     mov     [rdx], r8
  41     add     rdx, 8
  42     dec     rcx
  43 @@:
  44     shr     rcx, 1
  45     jz      @SetQwords
  46     movlhps xmm0, xmm0
  47 @@:
  48     movntdq [rdx], xmm0
  49     lea     rdx, [rdx + 16]
  50     loop    @B
  51     mfence
  52 @SetQwords:
  53     jnc     @F
  54     mov     [rdx], r8
  55 @@:
  56     ret
  57 InternalMemSetMem64 ENDP
  58
  59     END