MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.S

   1 #
   2 # ConvertAsm.py: Automatically generated from SetMem32.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 #   SetMem32.S
  18 #
  19 # Abstract:
  20 #
  21 #   SetMem32 function
  22 #
  23 # Notes:
  24 #
  25 #------------------------------------------------------------------------------
  26
  27
  28 #------------------------------------------------------------------------------
  29 #  VOID *
  30 #  EFIAPI
  31 #  InternalMemSetMem32 (
  32 #    IN VOID   *Buffer,
  33 #    IN UINTN  Count,
  34 #    IN UINT32 Value
  35 #    );
  36 #------------------------------------------------------------------------------
  37 .intel_syntax noprefix
  38 .globl ASM_PFX(InternalMemSetMem32)
  39 ASM_PFX(InternalMemSetMem32):
  40     movq    mm0, r8                     # mm0 <- Value
  41     mov     rax, rcx                    # rax <- Buffer
  42     xchg    rcx, rdx                    # rcx <- Count  rdx <- Buffer
  43     shr     rcx, 1                      # rcx <- # of qwords to set
  44     jz      L_SetDwords
  45     pshufw  mm0, mm0, 0x44
  46 L0:
  47     movntq  [rdx], mm0
  48     lea     rdx, [rdx + 8]              # use "lea" to avoid flag changes
  49     loop    L0
  50     mfence
  51 L_SetDwords:
  52     jnc     L1
  53     movd    [rdx], mm0
  54 L1:
  55     ret
  56