Games/Doom/amiga_timer.s

   1
   2                 .extern ppctimer
   3
   4 # return the timebase registers in the structure passed in
   5
   6                 .align  4
   7
   8 ppctimer:       mftbu   r4
   9                 mftbl   r5
  10                 mftbu   r6
  11                 cmpw    r4,r6
  12                 bne     ppctimer
  13
  14                 stw     r4,0(r3)
  15                 stw     r5,4(r3)
  16                 blr
  17