1/* Multiply a limb vector by a limb, for PowerPC.
2   Copyright (C) 1993-1995, 1997, 1999, 2000 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, write to the Free
17   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18   02111-1307 USA.  */
19
20#include <sysdep.h>
21#include <bp-sym.h>
22#include <bp-asm.h>
23
24/* mp_limb_t mpn_mul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr,
25                        mp_size_t s1_size, mp_limb_t s2_limb)
26   Calculate s1*s2 and put result in res_ptr; return carry.  */
27
28ENTRY (BP_SYM (__mpn_mul_1))
29#if __BOUNDED_POINTERS__
30	slwi r10,r5,2		/* convert limbs to bytes */
31	CHECK_BOUNDS_BOTH_WIDE (r3, r8, r9, r10)
32	CHECK_BOUNDS_BOTH_WIDE (r4, r8, r9, r10)
33#endif
34	mtctr	r5
35
36	lwz	r0,0(r4)
37	mullw	r7,r0,r6
38	mulhwu	r10,r0,r6
39	addi	r3,r3,-4		# adjust res_ptr
40	addic	r5,r5,0			# clear cy with dummy insn
41	bdz	L(1)
42
43L(0):	lwzu	r0,4(r4)
44	stwu	r7,4(r3)
45	mullw	r8,r0,r6
46	adde	r7,r8,r10
47	mulhwu	r10,r0,r6
48	bdnz	L(0)
49
50L(1):	stw	r7,4(r3)
51	addze	r3,r10
52	blr
53END (BP_SYM (__mpn_mul_1))
54