arch/metag/lib/ucmpdi2.S

   1 ! Copyright (C) 2012 by Imagination Technologies Ltd.
   2 !
   3 ! 64-bit unsigned compare routine.
   4 !
   5
   6         .text
   7         .global ___ucmpdi2
   8         .type   ___ucmpdi2,function
   9
  10 !         low    high
  11 ! u64 a  (D0Ar2, D1Ar1)
  12 ! u64 b  (D0Ar4, D1Ar3)
  13 ___ucmpdi2:
  14         ! start at 1 (equal) and conditionally increment or decrement
  15         MOV     D0Re0,#1
  16
  17         ! high words
  18         CMP     D1Ar1,D1Ar3
  19         ! or if equal, low words
  20         CMPEQ   D0Ar2,D0Ar4
  21
  22         ! unsigned compare
  23         SUBLO   D0Re0,D0Re0,#1
  24         ADDHI   D0Re0,D0Re0,#1
  25
  26         MOV     PC,D1RtP
  27         .size ___ucmpdi2,.-___ucmpdi2