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/*
This file is very similar to ../distibution.h, but some adaptations are
needed for H48 because of the intertwined fallback table, and it is easier
to have some duplication than to make these functions needlessly generic.
*/
STATIC wrapthread_return_t getdistribution_h48_runthread(void *);
STATIC void getdistribution_h48(const unsigned char *,
uint64_t [static INFO_DISTRIBUTION_LEN], const tableinfo_t [static 1]);
STATIC wrapthread_return_t
getdistribution_h48_runthread(void *arg)
{
getdistribution_data_t *data = (getdistribution_data_t *)arg;
const unsigned char *table;
uint8_t j, k, m;
uint64_t line, d;
unsigned char t;
memset(data->distr, 0, INFO_DISTRIBUTION_LEN * sizeof(uint64_t));
k = data->bits;
table = data->table;
m = TABLE_MASK(0, k);
for (line = data->min; line < data->max; line++) {
for (d = 0; d < H48_LINE_BYTES; d++) {
t = table[d + line * H48_LINE_BYTES];
for (j = 0; j < ENTRIES_PER_BYTE(k); j++)
data->distr[(t & (m << (j*k))) >> (j*k)]++;
}
t = table[(line+1) * H48_LINE_BYTES - 1];
data->distr[(t & (m << (2*k))) >> (2*k)]--;
data->distr[(t & (m << (3*k))) >> (3*k)]--;
}
return wrapthread_return_val;
}
STATIC void
getdistribution_h48(
const unsigned char *table,
uint64_t distr[static INFO_DISTRIBUTION_LEN],
const tableinfo_t info[static 1]
) {
getdistribution_data_t targ[THREADS];
wrapthread_define_var_thread_t(thread[THREADS]);
uint64_t local_distr[THREADS][INFO_DISTRIBUTION_LEN];
uint64_t i, j, lines, lines_per_thread, c;
lines = H48_LINES(info->h48h);
lines_per_thread = DIV_ROUND_UP(lines, THREADS);
for (i = 0; i < THREADS; i++) {
targ[i] = (getdistribution_data_t) {
.min = i * lines_per_thread,
.max = MIN((i+1) * lines_per_thread, lines),
.bits = info->bits,
.distr = local_distr[i],
.table = table,
};
wrapthread_create(&thread[i],
getdistribution_h48_runthread, &targ[i]);
}
for (i = 0; i < THREADS; i++)
wrapthread_join(thread[i]);
memset(distr, 0, INFO_DISTRIBUTION_LEN * sizeof(uint64_t));
for (i = 0; i < THREADS; i++)
for (j = 0; j < INFO_DISTRIBUTION_LEN; j++)
distr[j] += local_distr[i][j];
/* Clean up excess values */
c = H48_LINE_EXT(H48_COORDMAX(info->h48h)) % H48_LINE_ALLCOORDS;
distr[3] -= H48_LINE_COORDS - c;
}
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