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., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21
  22 ! INPUT PARAMETERS
  23 ! res_ptr       r7
  24 ! s1_ptr        r6
  25 ! s2_ptr        r5
  26 ! size          r4
  27
  28 ! If we are really crazy, we can use push to write a few result words
  29 ! backwards, using push just because it is faster than reg+disp.  We'd
  30 ! then add 2x the number of words written to r7...
  31
  32         unseg
  33         .text
  34         even
  35         global ___mpn_add_n
  36 ___mpn_add_n:
  37         pop     r0,@r6
  38         pop     r1,@r5
  39         add     r0,r1
  40         ld      @r7,r0
  41         dec     r4
  42         jr      eq,Lend
  43 Loop:   pop     r0,@r6
  44         pop     r1,@r5
  45         adc     r0,r1
  46         inc     r7,#2
  47         ld      @r7,r0
  48         dec     r4
  49         jr      ne,Loop
  50 Lend:   ld      r2,r4           ! use 0 already in r4
  51         adc     r2,r2
  52         ret     t