mkp224o/ed25519/ref10/fe.h

#ifndef FE_H
#define FE_H

#include "crypto_int32.h"
#include <stddef.h>

typedef crypto_int32 fe[10];

/*
fe means field element.
Here the field is \Z/(2^255-19).
An element t, entries t[0]...t[9], represents the integer
t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9].
Bounds on each t[i] vary depending on context.
*/

#define fe_frombytes CRYPTO_NAMESPACE(fe_frombytes)
#define fe_tobytes CRYPTO_NAMESPACE(fe_tobytes)
#define fe_copy CRYPTO_NAMESPACE(fe_copy)
#define fe_isnonzero CRYPTO_NAMESPACE(fe_isnonzero)
#define fe_isnegative CRYPTO_NAMESPACE(fe_isnegative)
#define fe_0 CRYPTO_NAMESPACE(fe_0)
#define fe_1 CRYPTO_NAMESPACE(fe_1)
#define fe_cswap CRYPTO_NAMESPACE(fe_cswap)
#define fe_cmov CRYPTO_NAMESPACE(fe_cmov)
#define fe_add CRYPTO_NAMESPACE(fe_add)
#define fe_sub CRYPTO_NAMESPACE(fe_sub)
#define fe_neg CRYPTO_NAMESPACE(fe_neg)
#define fe_mul CRYPTO_NAMESPACE(fe_mul)
#define fe_sq CRYPTO_NAMESPACE(fe_sq)
#define fe_sq2 CRYPTO_NAMESPACE(fe_sq2)
#define fe_invert CRYPTO_NAMESPACE(fe_invert)
#define fe_batchinvert CRYPTO_NAMESPACE(fe_batchinvert)
#define fe_pow22523 CRYPTO_NAMESPACE(fe_pow22523)

extern void fe_frombytes(fe,const unsigned char *);
extern void fe_tobytes(unsigned char *,const fe);

extern void fe_copy(fe,const fe);
extern int fe_isnonzero(const fe);
extern int fe_isnegative(const fe);
extern void fe_0(fe);
extern void fe_1(fe);
extern void fe_cswap(fe,fe,unsigned int);
extern void fe_cmov(fe,const fe,unsigned int);

extern void fe_add(fe,const fe,const fe);
extern void fe_sub(fe,const fe,const fe);
extern void fe_neg(fe,const fe);
extern void fe_mul(fe,const fe,const fe);
extern void fe_sq(fe,const fe);
extern void fe_sq2(fe,const fe);
extern void fe_invert(fe,const fe);
extern void fe_batchinvert(fe *out,fe *in,fe *tmp,size_t num,size_t shift);
extern void fe_pow22523(fe,const fe);

#endif