summaryrefslogtreecommitdiff
path: root/n/avr/modules/math/fixed/fixed.h
blob: ab20779001b236cf2f6b8dd5c8caf65017993008 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#ifndef fixed_h
#define fixed_h
/* fixed.h */
/* avr.math.fixed - Fixed point math module. {{{
 *
 * Copyright (C) 2005 Nicolas Schodet
 *
 * Robot APB Team/Efrei 2006.
 *        Web: http://assos.efrei.fr/robot/
 *      Email: robot AT efrei DOT fr
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * }}} */

/** Multiply f8.24 by f8.24, return f8.24. */
#define fixed_mul_f824(a, b) ({ \
    uint16_t dummy; \
    asm ("" : "=r" (dummy)); \
    fixed_mul_f824_asm (dummy, a, b); })
int32_t
fixed_mul_f824_asm (uint16_t dummy, int32_t a, int32_t b);

#endif /* fixed_h */