1 # PowerPC-64 mpn_add_n -- Add two limb vectors of the same length > 0 and
2 # store sum in a third limb vector.
4 # Copyright (C) 1999, 2000 Free Software Foundation, Inc.
6 # This file is part of the GNU MP Library.
8 # The GNU MP Library is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU Lesser General Public License as published by
10 # the Free Software Foundation; either version 2.1 of the License, or (at your
11 # option) any later version.
13 # The GNU MP Library is distributed in the hope that it will be useful, but
14 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 # License for more details.
18 # You should have received a copy of the GNU Lesser General Public License
19 # along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 include(`../config.m4')
34 mtctr r6 # copy size into CTR
35 addic r0,r0,0 # clear cy
36 ld r8,0(r4) # load least significant s1 limb
37 ld r0,0(r5) # load least significant s2 limb
38 addi r3,r3,-8 # offset res_ptr, it's updated before it's used
39 bdz .Lend # If done, skip loop
40 .Loop: ld r9,8(r4) # load s1 limb
41 ld r10,8(r5) # load s2 limb
42 adde r7,r0,r8 # add limbs with cy, set cy
43 std r7,8(r3) # store result limb
44 bdz .Lexit # decrement CTR and exit if done
45 ldu r8,16(r4) # load s1 limb and update s1_ptr
46 ldu r0,16(r5) # load s2 limb and update s2_ptr
47 adde r7,r10,r9 # add limbs with cy, set cy
48 stdu r7,16(r3) # store result limb and update res_ptr
49 bdnz .Loop # decrement CTR and loop back
52 std r7,8(r3) # store ultimate result limb
53 li r3,0 # load cy into ...
54 addze r3,r3 # ... return value register
56 .Lexit: adde r7,r10,r9
58 li r3,0 # load cy into ...
59 addze r3,r3 # ... return value register