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Kahan sums 3 

Former-commit-id: e34f5bbb16a95c4d5517121454a4d5229bcb50c8
This commit is contained in:
Marek Nečada 2018-03-13 10:57:08 +02:00
parent ad2815434a
commit 5b5e77f985
1 changed files with 11 additions and 5 deletions
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16
qpms/vswf.c
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@ -296,21 +296,27 @@ csphvec_t qpms_eval_vswf(sph_t kr,
qpms_l_t lMax, qpms_bessel_t btyp, qpms_normalisation_t norm)
{
qpms_y_t nelem = qpms_lMax2nelem(lMax);
csphvec_t lsum = {0, 0, 0}, msum = {0, 0, 0}, esum = {0, 0, 0};
csphvec_t lsum, msum, esum, lcomp, mcomp, ecomp;
csphvec_kahaninit(&lsum, &lcomp);
csphvec_kahaninit(&msum, &mcomp);
csphvec_kahaninit(&esum, &ecomp);
csphvec_t *lset = NULL, *mset = NULL, *eset = NULL;
if(lc) lset = malloc(nelem * sizeof(csphvec_t));
if(mc) mset = malloc(nelem * sizeof(csphvec_t));
if(ec) eset = malloc(nelem * sizeof(csphvec_t));
qpms_vswf_fill(lset, mset, eset, lMax, kr, btyp, norm);
if(lc) for(qpms_y_t y = 0; y < nelem; ++y)
lsum = csphvec_add(lsum, csphvec_scale(lc[y], lset[y]));
csphvec_kahanadd(&lsum, &lcomp, csphvec_scale(lc[y], lset[y]));
if(mc) for(qpms_y_t y = 0; y < nelem; ++y)
msum = csphvec_add(msum, csphvec_scale(mc[y], mset[y]));
csphvec_kahanadd(&msum, &mcomp, csphvec_scale(mc[y], mset[y]));
if(ec) for(qpms_y_t y = 0; y < nelem; ++y)
esum = csphvec_add(esum, csphvec_scale(ec[y], eset[y]));
csphvec_kahanadd(&esum, &ecomp, csphvec_scale(ec[y], eset[y]));
if(lc) free(lset);
if(mc) free(mset);
if(ec) free(eset);
return csphvec_add(esum, csphvec_add(msum, lsum));
//return csphvec_add(esum, csphvec_add(msum, lsum));
csphvec_kahanadd(&esum, &ecomp, msum);
csphvec_kahanadd(&esum, &ecomp, lsum);
return esum;
}