arch/metag/lib/ucmpdi2.S

   1 ! SPDX-License-Identifier: GPL-2.0
   2 ! Copyright (C) 2012 by Imagination Technologies Ltd.
   3 !
   4 ! 64-bit unsigned compare routine.
   5 !
   6
   7         .text
   8         .global ___ucmpdi2
   9         .type   ___ucmpdi2,function
  10
  11 !         low    high
  12 ! u64 a  (D0Ar2, D1Ar1)
  13 ! u64 b  (D0Ar4, D1Ar3)
  14 ___ucmpdi2:
  15         ! start at 1 (equal) and conditionally increment or decrement
  16         MOV     D0Re0,#1
  17
  18         ! high words
  19         CMP     D1Ar1,D1Ar3
  20         ! or if equal, low words
  21         CMPEQ   D0Ar2,D0Ar4
  22
  23         ! unsigned compare
  24         SUBLO   D0Re0,D0Re0,#1
  25         ADDHI   D0Re0,D0Re0,#1
  26
  27         MOV     PC,D1RtP
  28         .size ___ucmpdi2,.-___ucmpdi2