reactos/lib/rtl/i386/fillmemory_asm.s

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            fillmemory_asm.S
   5  * PURPOSE:         Memory functions
   6  * PROGRAMMERS:     Patrick Baggett (baggett.patrick@gmail.com)
   7  *                  Alex Ionescu (alex@relsoft.net)
   8  *                  Magnus Olsen (magnusolsen@greatlord.com)
   9  */
  10
  11 .intel_syntax noprefix
  12
  13 /* GLOBALS ****************************************************************/
  14
  15 .globl  _RtlFillMemory@12          //[4]  (no bug)
  16
  17 /* FUNCTIONS ***************************************************************/
  18
  19 _RtlFillMemory@12:
  20     mov ecx,dword [esp + 8 ]     // ecx = Length
  21         cmp ecx,0// if (Length==0) goto .zero
  22         je  2f
  23
  24     mov edx, dword [esp + 4]     // edx = Destination
  25     mov eax, dword [esp + 12]    // eax = fill
  26 1:
  27     mov byte [edx + ecx -1],al   // src[Length - 1] = fill
  28     dec ecx  // Length = Length - 1
  29     jnz 1b   // if (Length!=0) goto .loop
  30 2:
  31     ret 12   // return