File: [local] / OpenXM_contrib / gmp / mpn / z8000x / Attic / sub_n.s (download)
Revision 1.1.1.2 (vendor branch), Sat Sep 9 14:12:45 2000 UTC (24 years ago) by maekawa
Branch: GMP
CVS Tags: maekawa-ipv6, VERSION_3_1_1, VERSION_3_1, RELEASE_1_2_2, RELEASE_1_2_1, RELEASE_1_1_3 Changes since 1.1.1.1: +8 -8
lines
Import gmp 3.1
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! Z8000 (32 bit limb version) __gmpn_sub_n -- Subtract two limb vectors of the
! same length > 0 and store difference in a third limb vector.
! Copyright (C) 1993, 1994, 2000 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 Lesser General Public License as published by
! the Free Software Foundation; either version 2.1 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 Lesser General Public
! License for more details.
! You should have received a copy of the GNU Lesser 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 ___gmpn_sub_n
___gmpn_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