Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLibRepStr / x64 / ZeroMem.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation\r
; All rights reserved. This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   ZeroMem.Asm\r
;\r
; Abstract:\r
;\r
;   ZeroMem function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .code\r
\r
;------------------------------------------------------------------------------\r
;  VOID *\r
;  InternalMemZeroMem (\r
;    IN VOID   *Buffer,\r
;    IN UINTN  Count\r
;    );\r
;------------------------------------------------------------------------------\r
InternalMemZeroMem  PROC    USES    rdi\r
    push    rcx\r
    xor     rax, rax\r
    mov     rdi, rcx\r
    mov     rcx, rdx\r
    shr     rcx, 3\r
    and     rdx, 7\r
    rep     stosq\r
    mov     ecx, edx\r
    rep     stosb\r
    pop     rax\r
    ret\r
InternalMemZeroMem  ENDP\r
\r
    END\r