sysdeps/z8000/add_n.s

   1 ! Z8000 __mpn_add_n -- Add two limb vectors of equal, non-zero length.
   2
   3 ! Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   4
   5 ! This file is part of the GNU MP Library.
   6
   7 ! The GNU MP Library is free software; you can redistribute it and/or modify
   8 ! it under the terms of the GNU Library General Public License as published by
   9 ! the Free Software Foundation; either version 2 of the License, or (at your
  10 ! option) any later version.
  11
  12 ! The GNU MP Library is distributed in the hope that it will be useful, but
  13 ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 ! or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  15 ! License for more details.
  16
  17 ! You should have received a copy of the GNU Library General Public License
  18 ! along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
  19 ! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  20 ! MA 02111-1307, USA.
  21
  22
  23 ! INPUT PARAMETERS
  24 ! res_ptr       r7
  25 ! s1_ptr        r6
  26 ! s2_ptr        r5
  27 ! size          r4
  28
  29 ! If we are really crazy, we can use push to write a few result words
  30 ! backwards, using push just because it is faster than reg+disp.  We'd
  31 ! then add 2x the number of words written to r7...
  32
  33         unseg
  34         .text
  35         even
  36         global ___mpn_add_n
  37 ___mpn_add_n:
  38         pop     r0,@r6
  39         pop     r1,@r5
  40         add     r0,r1
  41         ld      @r7,r0
  42         dec     r4
  43         jr      eq,Lend
  44 Loop:   pop     r0,@r6
  45         pop     r1,@r5
  46         adc     r0,r1
  47         inc     r7,#2
  48         ld      @r7,r0
  49         dec     r4
  50         jr      ne,Loop
  51 Lend:   ld      r2,r4           ! use 0 already in r4
  52         adc     r2,r2
  53         ret     t