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#ifndef FE_H |
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#define FE_H |
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#include "fixedint.h" |
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/* |
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fe means field element. |
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Here the field is \Z/(2^255-19). |
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An element t, entries t[0]...t[9], represents the integer |
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t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9]. |
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Bounds on each t[i] vary depending on context. |
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*/ |
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typedef int32_t fe[10]; |
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void fe_0(fe h); |
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void fe_1(fe h); |
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void fe_frombytes(fe h, const unsigned char *s); |
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void fe_tobytes(unsigned char *s, const fe h); |
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void fe_copy(fe h, const fe f); |
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int fe_isnegative(const fe f); |
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int fe_isnonzero(const fe f); |
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void fe_cmov(fe f, const fe g, unsigned int b); |
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void fe_cswap(fe f, fe g, unsigned int b); |
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void fe_neg(fe h, const fe f); |
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void fe_add(fe h, const fe f, const fe g); |
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void fe_invert(fe out, const fe z); |
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void fe_sq(fe h, const fe f); |
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void fe_sq2(fe h, const fe f); |
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void fe_mul(fe h, const fe f, const fe g); |
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void fe_mul121666(fe h, fe f); |
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void fe_pow22523(fe out, const fe z); |
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void fe_sub(fe h, const fe f, const fe g); |
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#endif |
