cpc_buf_create
if ((sgrp->sets[sgrp->nelem].data1 = cpc_buf_create(sgrp->cpc, set))
(sgrp->sets[sgrp->nelem].data2 = cpc_buf_create(sgrp->cpc, set))
(sgrp->sets[sgrp->nelem].scratch = cpc_buf_create(sgrp->cpc, set))
newa[i].data1 = cpc_buf_create(old->cpc, newa[i].set);
newa[i].data2 = cpc_buf_create(old->cpc, newa[i].set);
newa[i].scratch = cpc_buf_create(old->cpc, newa[i].set);
extern cpc_buf_t *cpc_buf_create(cpc_t *cpc, cpc_set_t *set);