216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/* Complex RDFT2s of rank >= 2, for the case where we are distributed
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across the first dimension only, and the output is not transposed. */
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#include "mpi-dft.h"
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#include "mpi-rdft2.h"
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#include "rdft/rdft.h"
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typedef struct {
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solver super;
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int preserve_input; /* preserve input even if DESTROY_INPUT was passed */
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} S;
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typedef struct {
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plan_mpi_rdft2 super;
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plan *cld1, *cld2;
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INT vn;
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int preserve_input;
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} P;
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static void apply_r2c(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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plan_rdft2 *cld1;
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plan_rdft *cld2;
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/* RDFT2 local dimensions */
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cld1 = (plan_rdft2 *) ego->cld1;
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if (ego->preserve_input) {
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cld1->apply(ego->cld1, I, I+ego->vn, O, O+1);
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I = O;
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}
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else
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cld1->apply(ego->cld1, I, I+ego->vn, I, I+1);
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/* DFT non-local dimension (via dft-rank1-bigvec, usually): */
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cld2 = (plan_rdft *) ego->cld2;
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cld2->apply(ego->cld2, I, O);
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}
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static void apply_c2r(const plan *ego_, R *I, R *O)
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{
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const P *ego = (const P *) ego_;
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plan_rdft2 *cld1;
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plan_rdft *cld2;
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/* DFT non-local dimension (via dft-rank1-bigvec, usually): */
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cld2 = (plan_rdft *) ego->cld2;
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cld2->apply(ego->cld2, I, O);
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/* RDFT2 local dimensions */
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cld1 = (plan_rdft2 *) ego->cld1;
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cld1->apply(ego->cld1, O, O+ego->vn, O, O+1);
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}
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static int applicable(const S *ego, const problem *p_,
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const planner *plnr)
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{
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const problem_mpi_rdft2 *p = (const problem_mpi_rdft2 *) p_;
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return (1
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&& p->sz->rnk > 1
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&& p->flags == 0 /* TRANSPOSED/SCRAMBLED_IN/OUT not supported */
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&& (!ego->preserve_input || (!NO_DESTROY_INPUTP(plnr)
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&& p->I != p->O
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&& p->kind == R2HC))
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&& XM(is_local_after)(1, p->sz, IB)
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&& XM(is_local_after)(1, p->sz, OB)
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&& (!NO_SLOWP(plnr) /* slow if rdft2-serial is applicable */
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|| !XM(rdft2_serial_applicable)(p))
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);
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}
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static void awake(plan *ego_, enum wakefulness wakefulness)
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{
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P *ego = (P *) ego_;
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X(plan_awake)(ego->cld1, wakefulness);
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X(plan_awake)(ego->cld2, wakefulness);
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}
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static void destroy(plan *ego_)
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{
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P *ego = (P *) ego_;
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X(plan_destroy_internal)(ego->cld2);
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X(plan_destroy_internal)(ego->cld1);
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}
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static void print(const plan *ego_, printer *p)
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{
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const P *ego = (const P *) ego_;
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p->print(p, "(mpi-rdft2-rank-geq2%s%(%p%)%(%p%))",
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ego->preserve_input==2 ?"/p":"", ego->cld1, ego->cld2);
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}
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static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
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{
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const S *ego = (const S *) ego_;
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const problem_mpi_rdft2 *p;
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P *pln;
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plan *cld1 = 0, *cld2 = 0;
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R *r0, *r1, *cr, *ci, *I, *O;
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tensor *sz;
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dtensor *sz2;
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int i, my_pe, n_pes;
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INT nrest;
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static const plan_adt padt = {
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XM(rdft2_solve), awake, print, destroy
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};
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UNUSED(ego);
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if (!applicable(ego, p_, plnr))
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return (plan *) 0;
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p = (const problem_mpi_rdft2 *) p_;
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I = p->I; O = p->O;
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if (p->kind == R2HC) {
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r1 = (r0 = p->I) + p->vn;
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if (ego->preserve_input || NO_DESTROY_INPUTP(plnr)) {
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ci = (cr = p->O) + 1;
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I = O;
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}
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else
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ci = (cr = p->I) + 1;
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}
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else {
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r1 = (r0 = p->O) + p->vn;
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ci = (cr = p->O) + 1;
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}
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MPI_Comm_rank(p->comm, &my_pe);
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MPI_Comm_size(p->comm, &n_pes);
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sz = X(mktensor)(p->sz->rnk - 1); /* tensor of last rnk-1 dimensions */
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i = p->sz->rnk - 2; A(i >= 0);
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sz->dims[i].is = sz->dims[i].os = 2 * p->vn;
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sz->dims[i].n = p->sz->dims[i+1].n / 2 + 1;
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for (--i; i >= 0; --i) {
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sz->dims[i].n = p->sz->dims[i+1].n;
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sz->dims[i].is = sz->dims[i].os = sz->dims[i+1].n * sz->dims[i+1].is;
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}
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nrest = X(tensor_sz)(sz);
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{
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INT ivs = 1 + (p->kind == HC2R), ovs = 1 + (p->kind == R2HC);
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INT is = sz->dims[0].n * sz->dims[0].is;
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INT b = XM(block)(p->sz->dims[0].n, p->sz->dims[0].b[IB], my_pe);
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sz->dims[p->sz->rnk - 2].n = p->sz->dims[p->sz->rnk - 1].n;
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cld1 = X(mkplan_d)(plnr,
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X(mkproblem_rdft2_d)(sz,
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X(mktensor_2d)(b, is, is,
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p->vn,ivs,ovs),
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r0, r1, cr, ci, p->kind));
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if (XM(any_true)(!cld1, p->comm)) goto nada;
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}
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sz2 = XM(mkdtensor)(1); /* tensor for first (distributed) dimension */
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sz2->dims[0] = p->sz->dims[0];
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cld2 = X(mkplan_d)(plnr, XM(mkproblem_dft_d)(sz2, nrest * p->vn,
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I, O, p->comm,
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p->kind == R2HC ?
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FFT_SIGN : -FFT_SIGN,
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RANK1_BIGVEC_ONLY));
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if (XM(any_true)(!cld2, p->comm)) goto nada;
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pln = MKPLAN_MPI_RDFT2(P, &padt, p->kind == R2HC ? apply_r2c : apply_c2r);
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pln->cld1 = cld1;
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pln->cld2 = cld2;
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pln->preserve_input = ego->preserve_input ? 2 : NO_DESTROY_INPUTP(plnr);
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pln->vn = p->vn;
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X(ops_add)(&cld1->ops, &cld2->ops, &pln->super.super.ops);
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return &(pln->super.super);
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nada:
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X(plan_destroy_internal)(cld2);
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X(plan_destroy_internal)(cld1);
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return (plan *) 0;
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}
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static solver *mksolver(int preserve_input)
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{
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static const solver_adt sadt = { PROBLEM_MPI_RDFT2, mkplan, 0 };
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S *slv = MKSOLVER(S, &sadt);
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slv->preserve_input = preserve_input;
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return &(slv->super);
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}
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void XM(rdft2_rank_geq2_register)(planner *p)
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{
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int preserve_input;
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for (preserve_input = 0; preserve_input <= 1; ++preserve_input)
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REGISTER_SOLVER(p, mksolver(preserve_input));
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}
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