| ;------------------------------------------------------------------------------ | |
| ; | |
| ; 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 | |