src/string/i386/memcpy.s

   1 .global memcpy
   2 .global __memcpy_fwd
   3 .hidden __memcpy_fwd
   4 .type memcpy,@function
   5 memcpy:
   6 __memcpy_fwd:
   7         push %esi
   8         push %edi
   9         mov 12(%esp),%edi
  10         mov 16(%esp),%esi
  11         mov 20(%esp),%ecx
  12         mov %edi,%eax
  13         cmp $4,%ecx
  14         jc 1f
  15         test $3,%edi
  16         jz 1f
  17 2:      movsb
  18         dec %ecx
  19         test $3,%edi
  20         jnz 2b
  21 1:      mov %ecx,%edx
  22         shr $2,%ecx
  23         rep
  24         movsl
  25         and $3,%edx
  26         jz 1f
  27 2:      movsb
  28         dec %edx
  29         jnz 2b
  30 1:      pop %edi
  31         pop %esi
  32         ret