toolchain/gcc/newlib/libc/machine/h8300/strcmp.S

   1 #include "setarch.h"
   2
   3 #include "defines.h"
   4
   5         .section .text
   6         .align 2
   7         .global _strcmp
   8 _strcmp:
   9         MOVP    A0P,A2P
  10         MOVP    A1P,A3P
  11 .L5:
  12         mov.b   @A2P+,A1L
  13         beq     .L3
  14         mov.b   @A3P+,A0L
  15         cmp.b   A0L,A1L
  16         beq     .L5
  17 #ifdef __NORMAL_MODE__
  18         sub     #1,A3P
  19 #else
  20         subs    #1,A3P
  21 #endif
  22 .L3:
  23         mov.b   @(-1,A2P),A0L
  24         mov.b   @A3P,A1L
  25         sub.b   A1L,A0L
  26         ; We have to sign extend the result to 32bits just in case
  27         ; we are using 32bit integers.
  28 #ifdef __H8300H__
  29         exts.w  r0
  30         exts.l  er0
  31 #else
  32 #ifdef __H8300S__
  33         exts.w  r0
  34         exts.l  er0
  35 #else
  36         bld     #7,r0l
  37         subx    r0h,r0h
  38         subx    r1l,r1l
  39         subx    r1h,r1h
  40 #endif
  41 #endif
  42         rts
  43         .end