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+/*
+    mplogic.h
+
+    by Michael J. Fromberger <http://www.dartmouth.edu/~sting/>
+    Copyright (C) 1998 Michael J. Fromberger, All Rights Reserved
+
+    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_ */