QuarkSocPkg/Override/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ScanMem8.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2013 Intel Corporation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
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# * Neither the name of Intel Corporation nor the names of its
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#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#
# Module Name:
#
#   ScanMem8.Asm
#
# Abstract:
#
#   ScanMem8 function
#
# Notes:
#
#   The following BaseMemoryLib instances contain the same copy of this file:
#
#       BaseMemoryLibRepStr
#       BaseMemoryLibMmx
#       BaseMemoryLibSse2
#       BaseMemoryLibOptDxe
#       BaseMemoryLibOptPei
#
#------------------------------------------------------------------------------

ASM_GLOBAL ASM_PFX(InternalMemScanMem8)

#------------------------------------------------------------------------------
# CONST VOID *
# EFIAPI
# InternalMemScanMem8 (
#   IN      CONST VOID                *Buffer,
#   IN      UINTN                     Length,
#   IN      UINT8                     Value
#   );
#------------------------------------------------------------------------------
ASM_PFX(InternalMemScanMem8):
    push    %edi
    movl    12(%esp), %ecx
    movl    8(%esp), %edi
    movb    16(%esp), %al
    repne   scasb
    leal    -1(%edi), %eax
    jz      L0
    movl    %ecx, %eax
L0:
    pop     %edi
    ret