lib/ntdll/nasm/rtl/i386_RtlFillMemoryUlong.asm

   1 ; * base on ntdll/rtl/mem.c v 1.13 2003/07/11 13:50:23
   2 ; *
   3 ; * COPYRIGHT:       See COPYING in the top level directory
   4 ; * PROJECT:         ReactOS kernel
   5 ; * FILE:            i386_RtlMemoryUlong.asm
   6 ; * PURPOSE:         Memory functions
   7 ; * PROGRAMMER:      Magnus Olsen (magnusolsen@greatlord.com)
   8 ; * UPDATE HISTORY:
   9 ; *                  Created 20/07-2003
  10 ; *
  11
  12
  13
  14         BITS 32
  15         GLOBAL _RtlFillMemoryUlong@12    ; (no bug) (max optimze code)
  16
  17         SECTION .text
  18
  19
  20
  21
  22 ; *
  23 ; * VOID STDCALL RtlFillMemoryUlong (PVOID Destination, ULONG Length, ULONG Fill)
  24 ; *
  25
  26 _RtlFillMemoryUlong@12:
  27         mov ecx, dword [esp + 8 ]                   ; Length
  28         shr ecx,2                                   ; Length = Length / sizeof(ULONG)
  29           jz .zero                                    ; if (Length==0) goto .zero
  30
  31         push edi
  32         mov edi, dword [esp + (4 + 4)]             ; Destination
  33         mov eax, dword [esp + (12 + 4)]            ; Fill
  34         cld
  35         rep stosd                                  ; while (Length>0) {Destination[Length-1]=Fill; Length = Length - 1}
  36         pop edi
  37 .zero:
  38         ret 12