3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * \file bigint_add_u.S
22 * \email daniel.otte@rub.de
25 * \license GPLv3 or later
29 #include "avr-asm-macros.S"
46 movw r26, r24 ; X is our destination pointer
56 movw r18, LEN_A_0 ; swap length values
59 movw r18, r30 ; swap pointers
62 3: ; now a is the longer integer
66 st X+, r1 ; store length
68 st X+, r1 ; store 0 in info field
72 st X+, r24 ; store length
74 st X+, r1 ; store 0 in info field
78 adiw r30, 3 ; adjust pointers to point at wordv
101 rol r0 ; store carry bit
106 ror r0 ; write carry back
108 6: /* the main part is done */
114 ror r0 ; write carry back
121 rol r0 ; store carry bit