mirror of https://github.com/acidanthera/audk.git
50 lines
1.3 KiB
NASM
50 lines
1.3 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
; Module Name:
|
|
;
|
|
; ScanMem8.Asm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; ScanMem8 function
|
|
;
|
|
; Notes:
|
|
;
|
|
; The following BaseMemoryLib instances contain the same copy of this file:
|
|
;
|
|
; BaseMemoryLibRepStr
|
|
; BaseMemoryLibMmx
|
|
; BaseMemoryLibSse2
|
|
; BaseMemoryLibOptDxe
|
|
; BaseMemoryLibOptPei
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; CONST VOID *
|
|
; EFIAPI
|
|
; InternalMemScanMem8 (
|
|
; IN CONST VOID *Buffer,
|
|
; IN UINTN Length,
|
|
; IN UINT8 Value
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalMemScanMem8)
|
|
ASM_PFX(InternalMemScanMem8):
|
|
push rdi
|
|
mov rdi, rcx
|
|
mov rcx, rdx
|
|
mov rax, r8
|
|
repne scasb
|
|
lea rax, [rdi - 1]
|
|
cmovnz rax, rcx ; set rax to 0 if not found
|
|
pop rdi
|
|
ret
|
|
|