49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* rotate64.h */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ROTATE64_H_
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#define ROTATE64_H_
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#include <stdint.h>
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#define ROTL_0 0
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#define ROTL_1 1
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#define ROTL_2 2
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#define ROTL_3 3
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#define ROTL_4 4
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#define ROTR_0 0
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#define ROTR_1 (8+1)
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#define ROTR_2 (8+2)
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#define ROTR_3 (8+3)
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#define ROT_BIT(a) (((a)<=4)?((a)<<1):(0x01|((8-(a))<<1)))
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//#define ROT_CODE(a,b) (((a)<<4) | ((b)&0x0f))
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#define ROT_CODE(a) ((((a)/8+((((a)%8)>4)?1:0))<<4) | ROT_BIT(((a)%8)))
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//#define ROT_CODE(a) ((((a)/8)<<4) | ((a)%8)) /* rotations only to the left */
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uint64_t rotate64_1bit_left(uint64_t a);
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uint64_t rotate64_1bit_right(uint64_t a);
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uint64_t rotate64_nbit_autodir(uint64_t a, int8_t n);
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uint64_t rotate64left_code(uint64_t a, int8_t code);
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#endif /* ROTATE64_H_ */
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