cx_mlkem_poly.h

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 *   (c) 2026 Ledger SAS.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
 *
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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#ifndef MLKEM_POLY_H
#define MLKEM_POLY_H
 
#include "lcx_mlkem.h"
 
typedef struct {
    int16_t coeffs[MLKEM_N];
} poly;
 
int16_t MLKEM_POLY_montgomery_reduce(int32_t a);
 
int16_t MLKEM_POLY_fqmul(int16_t a, int16_t b);
 
int16_t MLKEM_POLY_barrett_reduce(int16_t a);
 
int16_t MLKEM_POLY_signed_to_unsigned_q(int16_t c);
 
void MLKEM_POLY_reduce(poly *r);
 
void MLKEM_POLY_tomont(poly *r);
 
void MLKEM_POLY_add(poly *r, const poly *b);
 
void MLKEM_POLY_sub(poly *r, const poly *b);
 
void MLKEM_POLY_ntt(poly *p);
 
void MLKEM_POLY_invntt_tomont(poly *p);
 
void MLKEM_POLY_basemul_acc_montgomery(poly *r, const poly *a, const poly *b, int32_t first);
 
void MLKEM_POLY_tobytes(uint8_t *r, const poly *a);
 
void MLKEM_POLY_frombytes(poly *r, const uint8_t *a);
 
uint8_t MLKEM_POLY_scalar_compress_d1(int16_t u);
 
uint8_t MLKEM_POLY_scalar_compress_d4(int16_t u);
 
int16_t MLKEM_POLY_scalar_decompress_d4(uint8_t u);
 
uint8_t MLKEM_POLY_scalar_compress_d5(int16_t u);
 
int16_t MLKEM_POLY_scalar_decompress_d5(uint8_t u);
 
uint16_t MLKEM_POLY_scalar_compress_d10(int16_t u);
 
int16_t MLKEM_POLY_scalar_decompress_d10(uint16_t u);
 
uint16_t MLKEM_POLY_scalar_compress_d11(int16_t u);
 
int16_t MLKEM_POLY_scalar_decompress_d11(uint16_t u);
 
void MLKEM_POLY_compress_d4(uint8_t *r, const poly *a);
 
void MLKEM_POLY_decompress_d4(poly *r, const uint8_t *a);
 
void MLKEM_POLY_compress_d5(uint8_t *r, const poly *a);
 
void MLKEM_POLY_decompress_d5(poly *r, const uint8_t *a);
 
void MLKEM_POLY_compress_d10(uint8_t *r, const poly *a);
 
void MLKEM_POLY_decompress_d10(poly *r, const uint8_t *a);
 
void MLKEM_POLY_compress_d11(uint8_t *r, const poly *a);
 
void MLKEM_POLY_decompress_d11(poly *r, const uint8_t *a);
 
void MLKEM_POLY_frommsg(poly *r, const uint8_t *msg);
 
void MLKEM_POLY_tomsg(uint8_t *msg, const poly *a);
 
#endif  // MLKEM_POLY_H