File: [local] / OpenXM / src / kan96xx / gmp-2.0.2 / mpn / z8000x / Attic / sub_n.s (download)
Revision 1.1.1.1 (vendor branch), Fri Oct 8 02:12:11 1999 UTC (24 years, 11 months ago) by maekawa
Branch: OpenXM
CVS Tags: RELEASE_20000124, RELEASE_1_1_2, ALPHA Changes since 1.1: +0 -0
lines
o import OpenXM sources
|
! Z8000 (32 bit limb version) __mpn_sub_n -- Subtract two limb vectors of the
! same length > 0 and store difference in a third limb vector.
! Copyright (C) 1993, 1994 Free Software Foundation, Inc.
! This file is part of the GNU MP Library.
! The GNU MP Library is free software; you can redistribute it and/or modify
! it under the terms of the GNU Library General Public License as published by
! the Free Software Foundation; either version 2 of the License, or (at your
! option) any later version.
! The GNU MP Library is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! License for more details.
! You should have received a copy of the GNU Library General Public License
! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! MA 02111-1307, USA.
! INPUT PARAMETERS
! res_ptr r7
! s1_ptr r6
! s2_ptr r5
! size r4
! If we are really crazy, we can use push to write a few result words
! backwards, using push just because it is faster than reg+disp. We'd
! then add 2x the number of words written to r7...
segm
.text
even
global ___mpn_sub_n
___mpn_sub_n:
popl rr0,@r6
popl rr8,@r5
subl rr0,rr8
ldl @r7,rr0
dec r4
jr eq,Lend
Loop: popl rr0,@r6
popl rr8,@r5
sbc r1,r9
sbc r0,r8
inc r7,#4
ldl @r7,rr0
dec r4
jr ne,Loop
Lend: ld r2,r4 ! use 0 already in r4
ld r3,r4
adc r2,r2
ret t