MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem64.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, Intel Corporation
   4 # All rights reserved. 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.S
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem64 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 #------------------------------------------------------------------------------
  25 #  VOID *
  26 #  InternalMemSetMem64 (
  27 #    IN VOID   *Buffer,
  28 #    IN UINTN  Count,
  29 #    IN UINT64 Value
  30 #    )
  31 #------------------------------------------------------------------------------
  32 .globl _InternalMemSetMem64
  33 _InternalMemSetMem64:
  34     movl    4(%esp), %eax
  35     movl    8(%esp), %ecx
  36     testb   $8, %al
  37     movl    %eax, %edx
  38     movq    0xc(%esp), %xmm0
  39     jz      L1
  40     movq    %xmm0, (%edx)
  41     addl    $8, %edx
  42     decl    %ecx
  43 L1:
  44     shrl    %ecx
  45     jz      @SetQwords
  46     movlhps %xmm0, %xmm0
  47 L2:
  48     movntdq %xmm0, (%edx)
  49     leal    16(%edx), %edx
  50     loop    L2
  51     mfence
  52 @SetQwords:
  53     jnc     L3
  54     movq    %xmm0, (%edx)
  55 L3:
  56     ret
  57
  58
  59