1! Z8000 (32 bit limb version) __gmpn_sub_n -- Subtract two limb vectors of the
2! same length > 0 and store difference in a third limb vector.
3
4! Copyright 1993, 1994, 2000 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 Lesser General Public License as published by
10! the Free Software Foundation; either version 3 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 Lesser General Public
16! License for more details.
17
18! You should have received a copy of the GNU Lesser General Public License
19! along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
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	segm
33	.text
34	even
35	global ___gmpn_sub_n
36___gmpn_sub_n:
37	popl	rr0,@r6
38	popl	rr8,@r5
39	subl	rr0,rr8
40	ldl	@r7,rr0
41	dec	r4
42	jr	eq,Lend
43Loop:	popl	rr0,@r6
44	popl	rr8,@r5
45	sbc	r1,r9
46	sbc	r0,r8
47	inc	r7,#4
48	ldl	@r7,rr0
49	dec	r4
50	jr	ne,Loop
51Lend:	ld	r2,r4		! use 0 already in r4
52	ld	r3,r4
53	adc	r2,r2
54	ret	t
55