lib/i386/em/em_xor.s

   1 .sect .text; .sect .rom; .sect .data; .sect .bss
   2 .sect .text
   3 .define .xor
   4
   5         ! #bytes in ecx
   6 .xor:
   7         pop     ebx             ! return address
   8         mov     edx,edi
   9         mov     edi,esp
  10         add     edi,ecx
  11         sar     ecx,2
  12 1:
  13         pop     eax
  14         xor     eax,(edi)
  15         stos
  16         loop    1b
  17         mov     edi,edx
  18         jmp     ebx