1 dnl PowerPC-32 mpn_add_n -- Add two limb vectors of the same length > 0 and
2 dnl store sum in a third limb vector.
4 dnl Copyright (C) 1995, 1997, 2000 Free Software Foundation, Inc.
6 dnl This file is part of the GNU MP Library.
8 dnl The GNU MP Library is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU Lesser General Public License as published by
10 dnl the Free Software Foundation; either version 2.1 of the License, or (at your
11 dnl option) any later version.
13 dnl The GNU MP Library is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 dnl License for more details.
18 dnl You should have received a copy of the GNU Lesser General Public License
19 dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 dnl MA 02111-1307, USA.
30 include(`../config.m4')
34 mtctr r6 C copy size into CTR
35 addic r0,r0,0 C clear cy
36 lwz r8,0(r4) C load least significant s1 limb
37 lwz r0,0(r5) C load least significant s2 limb
38 addi r3,r3,-4 C offset res_ptr, it's updated before it's used
39 bdz .Lend C If done, skip loop
40 .Loop: lwz r9,4(r4) C load s1 limb
41 lwz r10,4(r5) C load s2 limb
42 adde r7,r0,r8 C add limbs with cy, set cy
43 stw r7,4(r3) C store result limb
44 bdz .Lexit C decrement CTR and exit if done
45 lwzu r8,8(r4) C load s1 limb and update s1_ptr
46 lwzu r0,8(r5) C load s2 limb and update s2_ptr
47 adde r7,r10,r9 C add limbs with cy, set cy
48 stwu r7,8(r3) C store result limb and update res_ptr
49 bdnz .Loop C decrement CTR and loop back
52 stw r7,4(r3) C store ultimate result limb
53 li r3,0 C load cy into ...
54 addze r3,r3 C ... return value register
56 .Lexit: adde r7,r10,r9
58 li r3,0 C load cy into ...
59 addze r3,r3 C ... return value register