summary refs log tree commit diff
path: root/sysdeps/z8000/add_n.s
blob: 21efaf57145998f64696323721b9069dfee45e49 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
! Z8000 __mpn_add_n -- Add two limb vectors of equal, non-zero length.

! 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., 675 Mass Ave, Cambridge, MA 02139, 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...

	unseg
	.text
	even
	global ___mpn_add_n
___mpn_add_n:
	pop	r0,@r6
	pop	r1,@r5
	add	r0,r1
	ld	@r7,r0
	dec	r4
	jr	eq,Lend
Loop:	pop	r0,@r6
	pop	r1,@r5
	adc	r0,r1
	inc	r7,#2
	ld	@r7,r0
	dec	r4
	jr	ne,Loop
Lend:	ld	r2,r4		! use 0 already in r4
	adc	r2,r2
	ret	t