1. Updated function headers for all assembly function

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibMmx / Ia32 / SetMem.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
;   SetMem.asm\r
;\r
; Abstract:\r
;\r
;   SetMem function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .686\r
    .model  flat,C\r
    .mmx\r
    .code\r
\r
;------------------------------------------------------------------------------\r
;  VOID *\r
;  EFIAPI\r
;  InternalMemSetMem (\r
;    IN VOID   *Buffer,\r
;    IN UINTN  Count,\r
;    IN UINT8  Value\r
;    )\r
;------------------------------------------------------------------------------\r
InternalMemSetMem   PROC    USES    edi\r
    mov     al, [esp + 16]\r
    mov     ah, al\r
    shrd    edx, eax, 16\r
    shld    eax, edx, 16\r
    mov     ecx, [esp + 12]             ; ecx <- Count\r
    mov     edi, [esp + 8]              ; edi <- Buffer\r
    mov     edx, ecx\r
    and     edx, 7\r
    shr     ecx, 3                      ; # of Qwords to set\r
    jz      @SetBytes\r
    add     esp, -10h\r
    movq    [esp], mm0                  ; save mm0\r
    movq    [esp + 8], mm1              ; save mm1\r
    movd    mm0, eax\r
    movd    mm1, eax\r
    psllq   mm0, 32\r
    por     mm0, mm1                    ; fill mm0 with 8 Value's\r
@@:\r
    movq    [edi], mm0\r
    add     edi, 8\r
    loop    @B\r
    movq    mm0, [esp]                  ; restore mm0\r
    movq    mm1, [esp + 8]              ; restore mm1\r
    add     esp, 10h                    ; stack cleanup\r
@SetBytes:\r
    mov     ecx, edx\r
    rep     stosb\r
    mov     eax, [esp + 8]              ; eax <- Buffer as return value\r
    ret\r
InternalMemSetMem   ENDP\r
\r
    END\r