ntoskrnl/rtl/i386/memset.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/rtl/i386/memcpy.c
   6  * PROGRAMMER:      Hartmut Birr
   7  * UPDATE HISTORY:
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <string.h>
  13
  14 #define NDEBUG
  15 #include <internal/debug.h>
  16
  17 /* FUNCTIONS *****************************************************************/
  18
  19 void * memset(void *src, int val, size_t count)
  20 {
  21         __asm__( \
  22                 "or     %%ecx,%%ecx\n\t"\
  23                 "jz     .L1\n\t"        \
  24                 "cld\t\n"               \
  25                 "rep\t\n"               \
  26                 "stosb\t\n"             \
  27                 ".L1:\n\t"
  28                 :
  29                 : "D" (src), "c" (count), "a" (val));
  30         return src;
  31 }