/**
* initializes the sieve global variables
*/
void init_sieve_globals() {
mpz_init(mpz_fixed_hash_multiplier);
mpz_set(mpz_fixed_hash_multiplier, opts.mpz_fixed_hash_multiplier);
int64_arithmetic = opts.int64_arithmetic;
min_prime_index = opts.primes_in_primorial;
pool_share = opts.pool_share;
primes = opts.primes->ptr;
two_inverses = opts.two_inverses;
chain_length = opts.chain_length;
extensions = opts.sieve_extensions;
use_first_half = opts.use_first_half;
layers = extensions + chain_length;
max_prime_index = opts.max_prime_index;
cache_bits = opts.cache_bits;
sieve_words = opts.sieve_words;
sieve_size = opts.sieve_size;
candidate_bytes = sizeof(sieve_t) * sieve_words;
bit_half = sieve_size / 2;
word_half = sieve_words / 2;
cache_words = word_index(cache_bits);
cache_bytes = byte_index(cache_bits);
/* calculate the bi-twin cc1 and cc2 layers */
twn_cc1_layers = (chain_length + 1) / 2 - 1;
twn_cc2_layers = chain_length / 2 - 1;
/* check the primes if DEBUG is enabled */
check_primes(primes, two_inverses, max_prime_index);
}
/* Return first index of the byte at which this column is stored */
snp_int_t get_first_byte_in_column (const snp_int_t& column) const {
return byte_index(0,column);
}