sysdeps/vax/sub_n.s

   1 # VAX __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and store
   2 # difference in a third limb vector.
   3
   4 # Copyright (C) 1992, 1994 Free Software Foundation, Inc.
   5
   6 # This file is part of the GNU MP Library.
   7
   8 # The GNU MP Library is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU Library General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or (at your
  11 # option) any later version.
  12
  13 # The GNU MP Library is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  16 # License for more details.
  17
  18 # You should have received a copy of the GNU Library General Public License
  19 # along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
  20 # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  21 # MA 02111-1307, USA.
  22
  23
  24 # INPUT PARAMETERS
  25 # res_ptr       (sp + 4)
  26 # s1_ptr        (sp + 8)
  27 # s2_ptr        (sp + 12)
  28 # size          (sp + 16)
  29
  30 .text
  31         .align 1
  32 .globl ___mpn_sub_n
  33 ___mpn_sub_n:
  34         .word   0x0
  35         movl    16(ap),r0
  36         movl    12(ap),r1
  37         movl    8(ap),r2
  38         movl    4(ap),r3
  39         subl2   r4,r4
  40
  41 Loop:
  42         movl    (r2)+,r4
  43         sbwc    (r1)+,r4
  44         movl    r4,(r3)+
  45         jsobgtr r0,Loop
  46
  47         adwc    r0,r0
  48         ret