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| ;------------------------------------------------------------------------------
| ;
| ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
| ; SPDX-License-Identifier: BSD-2-Clause-Patent
| ;
| ; Module Name:
| ;
| ; SetMem.nasm
| ;
| ; Abstract:
| ;
| ; SetMem function
| ;
| ; Notes:
| ;
| ;------------------------------------------------------------------------------
|
| SECTION .text
|
| ;------------------------------------------------------------------------------
| ; VOID *
| ; EFIAPI
| ; InternalMemSetMem (
| ; IN VOID *Buffer,
| ; IN UINTN Count,
| ; IN UINT8 Value
| ; )
| ;------------------------------------------------------------------------------
| global ASM_PFX(InternalMemSetMem)
| ASM_PFX(InternalMemSetMem):
| push edi
| mov al, [esp + 16]
| mov ah, al
| shrd edx, eax, 16
| shld eax, edx, 16
| mov ecx, [esp + 12] ; ecx <- Count
| mov edi, [esp + 8] ; edi <- Buffer
| mov edx, ecx
| and edx, 7
| shr ecx, 3 ; # of Qwords to set
| jz @SetBytes
| add esp, -0x10
| movq [esp], mm0 ; save mm0
| movq [esp + 8], mm1 ; save mm1
| movd mm0, eax
| movd mm1, eax
| psllq mm0, 32
| por mm0, mm1 ; fill mm0 with 8 Value's
| .0:
| movq [edi], mm0
| add edi, 8
| loop .0
| movq mm0, [esp] ; restore mm0
| movq mm1, [esp + 8] ; restore mm1
| add esp, 0x10 ; stack cleanup
| @SetBytes:
| mov ecx, edx
| rep stosb
| mov eax, [esp + 8] ; eax <- Buffer as return value
| pop edi
| ret
|
|
|
