lib/sdk/crt/mem/i386/memchr_asm.s

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            lib/sdk/crt/mem/i386/memchr.s
   6  */
   7
   8 #include <reactos/asm.h>
   9
  10 /*
  11  * void* memchr(const void* s, int c, size_t n)
  12  */
  13
  14 PUBLIC  _memchr
  15 .code
  16
  17 _memchr:
  18         push ebp
  19         mov ebp, esp
  20         push edi
  21         mov     edi, [ebp + 8]
  22         mov     eax, [ebp + 12]
  23         mov     ecx, [ebp + 16]
  24         cld
  25         jecxz .Lnotfound
  26         repne scasb
  27         je .Lfound
  28 .Lnotfound:
  29         mov edi, 1
  30 .Lfound:
  31         mov eax, edi
  32         dec eax
  33         pop edi
  34         leave
  35         ret
  36
  37 END