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- #ifndef FE_H
- #define FE_H
- #include "fixedint.h"
- /*
- 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.
- */
- typedef int32_t fe[10];
- void fe_0(fe h);
- void fe_1(fe h);
- void fe_frombytes(fe h, const unsigned char *s);
- void fe_tobytes(unsigned char *s, const fe h);
- void fe_copy(fe h, const fe f);
- int fe_isnegative(const fe f);
- int fe_isnonzero(const fe f);
- void fe_cmov(fe f, const fe g, unsigned int b);
- void fe_cswap(fe f, fe g, unsigned int b);
- void fe_neg(fe h, const fe f);
- void fe_add(fe h, const fe f, const fe g);
- void fe_invert(fe out, const fe z);
- void fe_sq(fe h, const fe f);
- void fe_sq2(fe h, const fe f);
- void fe_mul(fe h, const fe f, const fe g);
- void fe_mul121666(fe h, fe f);
- void fe_pow22523(fe out, const fe z);
- void fe_sub(fe h, const fe f, const fe g);
- #endif
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