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
37
38
39
40
41
42
43
44
45
46
47
48
|
/*
mplogic.h
by Michael J. Fromberger <http://www.dartmouth.edu/~sting/>
Developed 1998-2004.
Assigned to the public domain as of 2002; see README.
Bitwise logical operations on MPI values
$Id: mplogic.h,v 1.1 2004/02/08 04:29:29 sting Exp $
*/
#ifndef _H_MPLOGIC_
#define _H_MPLOGIC_
#include "mpi.h"
/*
The logical operations treat an mp_int as if it were a bit vector,
without regard to its sign (an mp_int is represented in a signed
magnitude format). Values are treated as if they had an infinite
string of zeros left of the most-significant bit.
*/
/* Parity results */
#define MP_EVEN MP_YES
#define MP_ODD MP_NO
/* Bitwise functions */
mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */
mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */
mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */
mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */
/* Shift functions */
mp_err mpl_rsh(mp_int *a, mp_int *b, mp_digit d); /* right shift */
mp_err mpl_lsh(mp_int *a, mp_int *b, mp_digit d); /* left shift */
/* Bit count and parity */
mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */
mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */
mp_err mpl_parity(mp_int *a); /* determine parity */
#endif /* end _H_MPLOGIC_ */
|
