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
|
/* Multiply a limb vector by a limb, for PowerPC.
Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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 C 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 C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
/* mp_limb_t mpn_mul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr,
mp_size_t s1_size, mp_limb_t s2_limb)
Calculate s1*s2 and put result in res_ptr; return carry. */
ENTRY(__mpn_mul_1)
mtctr %r5
lwz %r0,0(%r4)
mullw %r7,%r0,%r6
mulhwu %r10,%r0,%r6
addi %r3,%r3,-4 # adjust res_ptr
addic %r5,%r5,0 # clear cy with dummy insn
bdz 1f
0: lwzu %r0,4(%r4)
stwu %r7,4(%r3)
mullw %r8,%r0,%r6
adde %r7,%r8,%r10
mulhwu %r10,%r0,%r6
bdnz 0b
1: stw %r7,4(%r3)
addze %r3,%r10
blr
END(__mpn_mul_1)
|
