arch/mn10300/lib/__ucmpdi2.S

   1 /* __ucmpdi2.S: 64-bit unsigned compare
   2  *
   3  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12
  13         .text
  14         .p2align        4
  15
  16 ###############################################################################
  17 #
  18 # int __ucmpdi2(unsigned long long a [D0:D1],
  19 #               unsigned long long b [(SP,12),(SP,16)])
  20 #
  21 # - returns 0, 1, or 2 as a <, =, > b respectively.
  22 #
  23 ###############################################################################
  24         .globl          __ucmpdi2
  25         .type           __ucmpdi2,@function
  26 __ucmpdi2:
  27         mov             (12,sp),a0              # b.lsw
  28         mov             (16,sp),a1              # b.msw
  29
  30         sub             a0,d0
  31         subc            a1,d1                   # may clear Z, never sets it
  32         bne             __ucmpdi2_differ        # a.msw != b.msw
  33         mov             +1,d0
  34         rets
  35
  36 __ucmpdi2_differ:
  37         # C flag is set if LE, clear if GE
  38         subc            d0,d0                   # -1 if LE, 0 if GE
  39         add             +1,d0                   #  0 if LE, 1 if GE
  40         add             d0,d0                   #  0 if LE, 2 if GE
  41         rets
  42
  43         .size           __ucmpdi2, .-__ucmpdi2