root/tools/testing/selftests/powerpc/copyloops/copy_tofrom_user_reference.S

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   1 #include <asm/ppc_asm.h>
   2 
   3 _GLOBAL(copy_tofrom_user_reference)
   4         cmpdi   r5,0
   5         beq     4f
   6 
   7         mtctr   r5
   8 
   9 1:      lbz     r6,0(r4)
  10 2:      stb     r6,0(r3)
  11         addi    r3,r3,1
  12         addi    r4,r4,1
  13         bdnz    1b
  14 
  15 3:      mfctr   r3
  16         blr
  17 
  18 4:      mr      r3,r5
  19         blr
  20 
  21 .section __ex_table,"a"
  22         .llong  1b,3b
  23         .llong  2b,3b
  24 .text
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