pqc/crypto_sign/dilithium-iii/clean/reduce.h
2019-01-22 17:40:27 +01:00

22 lines
440 B
C

#ifndef REDUCE_H
#define REDUCE_H
#include <stdint.h>
#define MONT 4193792U // 2^32 % Q
#define QINV 4236238847U // -q^(-1) mod 2^32
/* a <= Q*2^32 => r < 2*Q */
uint32_t PQCLEAN_DILITHIUMIII_montgomery_reduce(uint64_t a);
/* r < 2*Q */
uint32_t PQCLEAN_DILITHIUMIII_reduce32(uint32_t a);
/* a < 2*Q => r < Q */
uint32_t PQCLEAN_DILITHIUMIII_csubq(uint32_t a);
/* r < Q */
uint32_t PQCLEAN_DILITHIUMIII_freeze(uint32_t a);
#endif