288 lines
8.2 KiB
C
288 lines
8.2 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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/* Real-input (r2c) DFTs of rank >= 2, for the case where we are distributed
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across the first dimension only, and the output is transposed both
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in data distribution and in ordering (for the first 2 dimensions).
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Conversely, real-output (c2r) DFTs where the input is transposed.
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We don't currently support transposed-input r2c or transposed-output
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c2r transforms. */
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#include "mpi-rdft2.h"
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#include "mpi-transpose.h"
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#include "rdft/rdft.h"
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#include "dft/dft.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, *cldt, *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_dft *cld2;
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plan_rdft *cldt;
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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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/* global transpose */
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cldt = (plan_rdft *) ego->cldt;
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cldt->apply(ego->cldt, I, O);
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/* DFT final local dimension */
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cld2 = (plan_dft *) ego->cld2;
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cld2->apply(ego->cld2, O, O+1, O, O+1);
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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_dft *cld2;
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plan_rdft *cldt;
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/* IDFT local dimensions */
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cld2 = (plan_dft *) ego->cld2;
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if (ego->preserve_input) {
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cld2->apply(ego->cld2, I+1, I, O+1, O);
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I = O;
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}
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else
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cld2->apply(ego->cld2, I+1, I, I+1, I);
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/* global transpose */
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cldt = (plan_rdft *) ego->cldt;
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cldt->apply(ego->cldt, I, O);
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/* RDFT2 final local dimension */
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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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&& (!ego->preserve_input || (!NO_DESTROY_INPUTP(plnr)
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&& p->I != p->O))
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&& ((p->flags == TRANSPOSED_OUT && p->kind == R2HC
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&& XM(is_local_after)(1, p->sz, IB)
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&& XM(is_local_after)(2, p->sz, OB)
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&& XM(num_blocks)(p->sz->dims[0].n,
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p->sz->dims[0].b[OB]) == 1)
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||
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(p->flags == TRANSPOSED_IN && p->kind == HC2R
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&& XM(is_local_after)(1, p->sz, OB)
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&& XM(is_local_after)(2, p->sz, IB)
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&& XM(num_blocks)(p->sz->dims[0].n,
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p->sz->dims[0].b[IB]) == 1))
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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->cldt, 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->cldt);
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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-transposed%s%(%p%)%(%p%)%(%p%))",
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ego->preserve_input==2 ?"/p":"",
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ego->cld1, ego->cldt, 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, *cldt = 0, *cld2 = 0;
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R *r0, *r1, *cr, *ci, *ri, *ii, *ro, *io, *I, *O;
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tensor *sz;
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int i, my_pe, n_pes;
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INT nrest, n1, b1;
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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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block_kind k1, k2;
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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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k1 = IB; k2 = OB;
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r1 = (r0 = I) + p->vn;
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if (ego->preserve_input || NO_DESTROY_INPUTP(plnr)) {
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ci = (cr = O) + 1;
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I = O;
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}
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else
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ci = (cr = I) + 1;
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io = ii = (ro = ri = O) + 1;
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}
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else {
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k1 = OB; k2 = IB;
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r1 = (r0 = O) + p->vn;
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ci = (cr = O) + 1;
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if (ego->preserve_input || NO_DESTROY_INPUTP(plnr)) {
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ri = (ii = I) + 1;
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ro = (io = O) + 1;
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I = O;
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}
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else
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ro = ri = (io = ii = I) + 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].n = p->sz->dims[i+1].n / 2 + 1;
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sz->dims[i].is = sz->dims[i].os = 2 * p->vn;
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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 = 1; for (i = 1; i < sz->rnk; ++i) nrest *= sz->dims[i].n;
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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[k1], 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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nrest *= p->vn;
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n1 = p->sz->dims[1].n;
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b1 = p->sz->dims[1].b[k2];
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if (p->sz->rnk == 2) { /* n1 dimension is cut in ~half */
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n1 = n1 / 2 + 1;
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b1 = b1 == p->sz->dims[1].n ? n1 : b1;
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}
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if (p->kind == R2HC)
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cldt = X(mkplan_d)(plnr,
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XM(mkproblem_transpose)(
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p->sz->dims[0].n, n1, nrest * 2,
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I, O,
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p->sz->dims[0].b[IB], b1,
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p->comm, 0));
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else
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cldt = X(mkplan_d)(plnr,
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XM(mkproblem_transpose)(
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n1, p->sz->dims[0].n, nrest * 2,
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I, O,
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b1, p->sz->dims[0].b[OB],
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p->comm, 0));
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if (XM(any_true)(!cldt, p->comm)) goto nada;
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{
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INT is = p->sz->dims[0].n * nrest * 2;
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INT b = XM(block)(n1, b1, my_pe);
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cld2 = X(mkplan_d)(plnr,
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X(mkproblem_dft_d)(X(mktensor_1d)(
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p->sz->dims[0].n,
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nrest * 2, nrest * 2),
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X(mktensor_2d)(b, is, is,
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nrest, 2, 2),
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ri, ii, ro, io));
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if (XM(any_true)(!cld2, p->comm)) goto nada;
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}
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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->cldt = cldt;
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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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X(ops_add2)(&cldt->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)(cldt);
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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_transposed_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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