MdePkg/Library/BaseMemoryLibMmx/X64/SetMem.S

   1 #
   2 # ConvertAsm.py: Automatically generated from SetMem.asm
   3 #
   4 #------------------------------------------------------------------------------
   5 #
   6 # Copyright (c) 2006 - 2008, Intel Corporation
   7 # All rights reserved. This program and the accompanying materials
   8 # are licensed and made available under the terms and conditions of the BSD License
   9 # which accompanies this distribution.  The full text of the license may be found at
  10 # http://opensource.org/licenses/bsd-license.php
  11 #
  12 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14 #
  15 # Module Name:
  16 #
  17 #   SetMem.S
  18 #
  19 # Abstract:
  20 #
  21 #   SetMem function
  22 #
  23 # Notes:
  24 #
  25 #------------------------------------------------------------------------------
  26
  27
  28 #------------------------------------------------------------------------------
  29 #  VOID *
  30 #  EFIAPI
  31 #  InternalMemSetMem (
  32 #    IN VOID   *Buffer,
  33 #    IN UINTN  Count,
  34 #    IN UINT8  Value
  35 #    )
  36 #------------------------------------------------------------------------------
  37 .intel_syntax noprefix
  38 .globl ASM_PFX(InternalMemSetMem)
  39 ASM_PFX(InternalMemSetMem):
  40     push    rdi
  41     mov     rax, r8
  42     mov     ah, al
  43     movq    mm0, rax
  44     mov     r8, rcx
  45     mov     rdi, r8                     # rdi <- Buffer
  46     mov     rcx, rdx
  47     and     edx, 7
  48     shr     rcx, 3
  49     jz      L_SetBytes
  50     pshufw  mm0, mm0, 0x0
  51 L0:
  52     movntq  [rdi], mm0
  53     add     rdi, 8
  54     loop    L0
  55     mfence
  56 L_SetBytes:
  57     mov     ecx, edx
  58     rep     stosb
  59     mov     rax, r8
  60     pop     rdi
  61     ret
  62