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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
# SetMem.S
#
# Abstract:
#
# SetMem function
#
# Notes:
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# VOID *
# EFIAPI
# InternalMemSetMem (
# IN VOID *Buffer,
# IN UINTN Count,
# IN UINT8 Value
# )
#------------------------------------------------------------------------------
.intel_syntax noprefix
.globl ASM_PFX(InternalMemSetMem)
ASM_PFX(InternalMemZeroMem):
push rdi
push rbx
push rcx # push Buffer
mov rax, r8 # rax = Value
and rax, 0xff # rax = lower 8 bits of r8, upper 56 bits are 0
mov ah, al # ah = al
mov bx, ax # bx = ax
shl rax, 0x10 # rax = ax << 16
mov ax, bx # ax = bx
mov rbx, rax # ebx = eax
shl rax, 0x20 # rax = rax << 32
or rax, rbx # eax = ebx
mov rdi, rcx # rdi = Buffer
mov rcx, rdx # rcx = Count
shr rcx, 3 # rcx = rcx / 8
cld
rep stosq
mov rcx, rdx # rcx = rdx
and rcx, 7 # rcx = rcx & 7
rep stosb
pop rax # rax = Buffer
pop rbx
pop rdi
ret
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