[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EfiCommonLib / Ia32 / EfiZeroMemRep4.asm

;/*++\r
;\r
;Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r
;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
  ;EfiZeroMemRep4.asm\r
;\r
;Abstract:\r
;\r
  ;This is the code that uses rep stosd ZeroMem service\r
;\r
;--*/\r
;\r
;---------------------------------------------------------------------------\r
    .686\r
    .model  flat,C\r
    .code\r
\r
;---------------------------------------------------------------------------\r
;#include "Tiano.h"\r
;\r
;VOID\r
;EfiCommonLibZeroMem (\r
  ;IN VOID   *Buffer,\r
  ;IN UINTN  Count\r
  ;)\r
;/*++\r
;\r
;Input:  VOID   *Buffer - Pointer to buffer to clear\r
        ;UINTN  Count  - Number of bytes to clear\r
;\r
;Output: None.\r
;\r
;Saves:\r
;\r
;Modifies:\r
;\r
;Description:  This function uses rep stosd to zero memory.\r
;\r
;--*/\r
EfiCommonLibZeroMem PROC\r
    push        ebp\r
    mov         ebp,esp\r
    push        edi\r
    mov         ecx,dword ptr [ebp+0Ch]\r
    test        ecx, ecx\r
    je          Exit\r
    xor         eax, eax\r
    mov         edi,dword ptr [ebp+8]\r
    mov         edx, ecx\r
    shr         ecx, 2\r
    and         edx, 3\r
    rep         stosd\r
    mov         ecx, edx\r
    rep         stosb\r
Exit:\r
    pop         edi\r
    pop         ebp\r
    ret\r
\r
EfiCommonLibZeroMem ENDP	\r
	END\r
Commit	Line	Data
c1ea912c	1	;/*++\r
c1ea912c	2	;\r
4ea9375a HT	3	;Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r
4ea9375a HT	4	;This program and the accompanying materials \r
c1ea912c	5	;are licensed and made available under the terms and conditions of the BSD License \r
	6	;which accompanies this distribution. The full text of the license may be found at \r
	7	;http://opensource.org/licenses/bsd-license.php \r
	8	; \r
	9	;THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	10	;WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	11	;\r
	12	;Module Name:\r
	13	;\r
	14	;EfiZeroMemRep4.asm\r
	15	;\r
	16	;Abstract:\r
	17	;\r
	18	;This is the code that uses rep stosd ZeroMem service\r
	19	;\r
	20	;--*/\r
	21	;\r
	22	;---------------------------------------------------------------------------\r
	23	.686\r
	24	.model flat,C\r
	25	.code\r
	26	\r
	27	;---------------------------------------------------------------------------\r
	28	;#include "Tiano.h"\r
	29	;\r
	30	;VOID\r
	31	;EfiCommonLibZeroMem (\r
	32	;IN VOID *Buffer,\r
	33	;IN UINTN Count\r
	34	;)\r
	35	;/*++\r
	36	;\r
	37	;Input: VOID *Buffer - Pointer to buffer to clear\r
	38	;UINTN Count - Number of bytes to clear\r
	39	;\r
	40	;Output: None.\r
	41	;\r
	42	;Saves:\r
	43	;\r
	44	;Modifies:\r
	45	;\r
	46	;Description: This function uses rep stosd to zero memory.\r
	47	;\r
	48	;--*/\r
	49	EfiCommonLibZeroMem PROC\r
	50	push ebp\r
	51	mov ebp,esp\r
	52	push edi\r
	53	mov ecx,dword ptr [ebp+0Ch]\r
	54	test ecx, ecx\r
	55	je Exit\r
	56	xor eax, eax\r
	57	mov edi,dword ptr [ebp+8]\r
	58	mov edx, ecx\r
	59	shr ecx, 2\r
	60	and edx, 3\r
	61	rep stosd\r
	62	mov ecx, edx\r
	63	rep stosb\r
	64	Exit:\r
	65	pop edi\r
	66	pop ebp\r
	67	ret\r
	68	\r
69	EfiCommonLibZeroMem ENDP \r
70	END\r