38 lines
895 B
C
38 lines
895 B
C
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#ifndef FP_H
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#define FP_H
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#include "u512.h"
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/* fp is in the Montgomery domain, so interpreting that
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as an integer should never make sense.
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enable compiler warnings when mixing up u512 and fp. */
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typedef struct fp {
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u512 x;
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} fp;
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extern const fp fp_0;
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extern const fp fp_1;
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void fp_set(fp *x, uint64_t y);
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void fp_cswap(fp *x, fp *y, bool c);
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void fp_enc(fp *x, u512 const *y); /* encode to Montgomery representation */
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void fp_dec(u512 *x, fp const *y); /* decode from Montgomery representation */
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void fp_add2(fp *x, fp const *y);
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void fp_sub2(fp *x, fp const *y);
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void fp_mul2(fp *x, fp const *y);
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void fp_add3(fp *x, fp const *y, fp const *z);
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void fp_sub3(fp *x, fp const *y, fp const *z);
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void fp_mul3(fp *x, fp const *y, fp const *z);
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void fp_sq1(fp *x);
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void fp_sq2(fp *x, fp const *y);
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void fp_inv(fp *x);
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bool fp_issquare(fp const *x);
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void fp_random(fp *x);
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#endif
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