1/* SPARC v8 __mpn_submul_1 -- Multiply a limb vector with a limb and
2 *                            subtract the result from a second limb vector.
3 *
4 *      Copyright (C) 1992, 1993, 1994, 1998,
5 *                    2001, 2002 Free Software Foundation, Inc.
6 *
7 * This file is part of Libgcrypt.
8 *
9 * Libgcrypt is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * Libgcrypt is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
22 *
23 * Note: This code is heavily based on the GNU MP Library.
24 *	 Actually it's the same code with only minor changes in the
25 *	 way the data is stored; this is to support the abstraction
26 *	 of an optional secure memory allocation which may be used
27 *	 to avoid revealing of sensitive data due to paging etc.
28 */
29
30
31! INPUT PARAMETERS
32! res_ptr	o0
33! s1_ptr	o1
34! size		o2
35! s2_limb	o3
36
37#include "sysdep.h"
38
39.text
40	.align 4
41	.global C_SYMBOL_NAME(_gcry_mpih_submul_1)
42C_SYMBOL_NAME(_gcry_mpih_submul_1):
43	sub	%g0,%o2,%o2		! negate ...
44	sll	%o2,2,%o2		! ... and scale size
45	sub	%o1,%o2,%o1		! o1 is offset s1_ptr
46	sub	%o0,%o2,%g1		! g1 is offset res_ptr
47
48	mov	0,%o0			! clear cy_limb
49
50Loop:	ld	[%o1+%o2],%o4
51	ld	[%g1+%o2],%g2
52	umul	%o4,%o3,%o5
53	rd	%y,%g3
54	addcc	%o5,%o0,%o5
55	addx	%g3,0,%o0
56	subcc	%g2,%o5,%g2
57	addx	%o0,0,%o0
58	st	%g2,[%g1+%o2]
59
60	addcc	%o2,4,%o2
61	bne	Loop
62	 nop
63
64	retl
65	 nop
66
67
68