1 /* Add two limb vectors of the same length > 0 and store sum in a third
3 Copyright (C) 2000-2024 Free Software Foundation, Inc.
4 This file is part of the GNU MP Library.
6 The GNU MP Library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or (at your
9 option) any later version.
11 The GNU MP Library is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with the GNU MP Library; see the file COPYING.LIB. If not,
18 see <https://www.gnu.org/licenses/>. */
29 #include "asm-syntax.h"
33 st %r6,24(%r15) # save register 6
36 lhi %r0,1 # cannot use ahi to add carry, use alr
37 .L0: l %r6,0(%r1,%r3) # .L0 -> no carry from last add
43 slr %r2,%r2 # no last carry to return
45 .L2: l %r6,0(%r1,%r3) # .L2 -> carry from last add
48 alr %r6,%r0 # no carry yet, add carry from last add
51 brc 12,.L1 # new carry ?
53 lr %r2,%r0 # return last carry
55 .L4: alr %r6,%r0 # already a carry, add carry from last add
59 lr %r2,%r0 # return last carry
60 .Lexit: l %r6,24(%r15) # restore register 6