freeldr/freeldr/rtl/memset.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <freeldr.h>
  21
  22 #ifdef __i386__
  23 void *memset(void *src, int val, size_t count)
  24 {
  25         __asm__( \
  26                 "or     %%ecx,%%ecx\n\t"\
  27                 "jz     .L1\n\t"        \
  28                 "cld\t\n"               \
  29                 "rep\t\n"               \
  30                 "stosb\t\n"             \
  31                 ".L1:\n\t"
  32                 :
  33                 : "D" (src), "c" (count), "a" (val));
  34         return src;
  35 }
  36 #else
  37 void *memset(void *src, int val, size_t count)
  38 {
  39         unsigned int    i;
  40         unsigned char*  buf1 = src;
  41
  42         for (i=0; i<count; i++)
  43         {
  44                 buf1[i] = val;
  45         }
  46
  47         return src;
  48 }
  49 #endif