arch/h8300/lib/strncpy.S

   1 ;;; strncpy.S
   2
   3 #include <asm/linkage.h>
   4
   5         .text
   6 .global strncpy_from_user
   7
   8 ;;; long strncpy_from_user(void *to, void *from, size_t n)
   9 strncpy_from_user:
  10         mov.l   er2,er2
  11         bne     1f
  12         sub.l   er0,er0
  13         rts
  14 1:
  15         mov.l   er4,@-sp
  16         sub.l   er3,er3
  17 2:
  18         mov.b   @er1+,r4l
  19         mov.b   r4l,@er0
  20         adds    #1,er0
  21         beq     3f
  22         inc.l   #1,er3
  23         dec.l   #1,er2
  24         bne     2b
  25 3:
  26         dec.l   #1,er2
  27 4:
  28         mov.b   r4l,@er0
  29         adds    #1,er0
  30         dec.l   #1,er2
  31         bne     4b
  32         mov.l   er3,er0
  33         mov.l   @sp+,er4
  34         rts