1/* Multiply a limb vector by a limb, for PowerPC.
2   Copyright (C) 1993-2021 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, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20
21/* mp_limb_t mpn_mul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr,
22                        mp_size_t s1_size, mp_limb_t s2_limb)
23   Calculate s1*s2 and put result in res_ptr; return carry.  */
24
25ENTRY (__mpn_mul_1)
26	mtctr	r5
27
28	lwz	r0,0(r4)
29	mullw	r7,r0,r6
30	mulhwu	r10,r0,r6
31	addi	r3,r3,-4		# adjust res_ptr
32	addic	r5,r5,0			# clear cy with dummy insn
33	bdz	L(1)
34
35L(0):	lwzu	r0,4(r4)
36	stwu	r7,4(r3)
37	mullw	r8,r0,r6
38	adde	r7,r8,r10
39	mulhwu	r10,r0,r6
40	bdnz	L(0)
41
42L(1):	stw	r7,4(r3)
43	addze	r3,r10
44	blr
45END (__mpn_mul_1)
46