mirror of
https://github.com/tildearrow/furnace.git
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296 lines
7.2 KiB
C
296 lines
7.2 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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#include "ct-hc2c.h"
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#include "dft/dft.h"
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typedef struct {
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plan_rdft2 super;
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plan *cld;
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plan *cldw;
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INT r;
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} P;
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static void apply_dit(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
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{
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const P *ego = (const P *) ego_;
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plan_rdft *cld;
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plan_hc2c *cldw;
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UNUSED(r1);
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cld = (plan_rdft *) ego->cld;
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cld->apply(ego->cld, r0, cr);
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cldw = (plan_hc2c *) ego->cldw;
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cldw->apply(ego->cldw, cr, ci);
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}
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static void apply_dif(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
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{
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const P *ego = (const P *) ego_;
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plan_rdft *cld;
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plan_hc2c *cldw;
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UNUSED(r1);
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cldw = (plan_hc2c *) ego->cldw;
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cldw->apply(ego->cldw, cr, ci);
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cld = (plan_rdft *) ego->cld;
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cld->apply(ego->cld, cr, r0);
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}
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static void apply_dit_dft(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
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{
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const P *ego = (const P *) ego_;
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plan_dft *cld;
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plan_hc2c *cldw;
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cld = (plan_dft *) ego->cld;
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cld->apply(ego->cld, r0, r1, cr, ci);
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cldw = (plan_hc2c *) ego->cldw;
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cldw->apply(ego->cldw, cr, ci);
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}
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static void apply_dif_dft(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
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{
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const P *ego = (const P *) ego_;
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plan_dft *cld;
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plan_hc2c *cldw;
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cldw = (plan_hc2c *) ego->cldw;
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cldw->apply(ego->cldw, cr, ci);
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cld = (plan_dft *) ego->cld;
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cld->apply(ego->cld, ci, cr, r1, r0);
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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->cld, wakefulness);
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X(plan_awake)(ego->cldw, 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->cldw);
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X(plan_destroy_internal)(ego->cld);
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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, "(rdft2-ct-%s/%D%(%p%)%(%p%))",
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(ego->super.apply == apply_dit ||
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ego->super.apply == apply_dit_dft)
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? "dit" : "dif",
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ego->r, ego->cldw, ego->cld);
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}
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static int applicable0(const hc2c_solver *ego, const problem *p_, planner *plnr)
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{
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const problem_rdft2 *p = (const problem_rdft2 *) p_;
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INT r;
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return (1
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&& p->sz->rnk == 1
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&& p->vecsz->rnk <= 1
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&& (/* either the problem is R2HC, which is solved by DIT */
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(p->kind == R2HC)
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||
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/* or the problem is HC2R, in which case it is solved
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by DIF, which destroys the input */
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(p->kind == HC2R &&
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(p->r0 == p->cr || !NO_DESTROY_INPUTP(plnr))))
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&& ((r = X(choose_radix)(ego->r, p->sz->dims[0].n)) > 0)
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&& p->sz->dims[0].n > r);
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}
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static int hc2c_applicable(const hc2c_solver *ego, const problem *p_,
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planner *plnr)
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{
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const problem_rdft2 *p;
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if (!applicable0(ego, p_, plnr))
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return 0;
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p = (const problem_rdft2 *) p_;
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return (0
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|| p->vecsz->rnk == 0
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|| !NO_VRECURSEP(plnr)
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);
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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 hc2c_solver *ego = (const hc2c_solver *) ego_;
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const problem_rdft2 *p;
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P *pln = 0;
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plan *cld = 0, *cldw = 0;
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INT n, r, m, v, ivs, ovs;
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iodim *d;
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static const plan_adt padt = {
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X(rdft2_solve), awake, print, destroy
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};
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if (!hc2c_applicable(ego, p_, plnr))
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return (plan *) 0;
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p = (const problem_rdft2 *) p_;
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d = p->sz->dims;
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n = d[0].n;
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r = X(choose_radix)(ego->r, n);
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A((r % 2) == 0);
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m = n / r;
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X(tensor_tornk1)(p->vecsz, &v, &ivs, &ovs);
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switch (p->kind) {
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case R2HC:
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cldw = ego->mkcldw(ego, R2HC,
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r, m * d[0].os,
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m, d[0].os,
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v, ovs,
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p->cr, p->ci, plnr);
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if (!cldw) goto nada;
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switch (ego->hc2ckind) {
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case HC2C_VIA_RDFT:
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cld = X(mkplan_d)(
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plnr,
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X(mkproblem_rdft_1_d)(
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X(mktensor_1d)(m, (r/2)*d[0].is, d[0].os),
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X(mktensor_3d)(
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2, p->r1 - p->r0, p->ci - p->cr,
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r / 2, d[0].is, m * d[0].os,
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v, ivs, ovs),
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p->r0, p->cr, R2HC)
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);
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if (!cld) goto nada;
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pln = MKPLAN_RDFT2(P, &padt, apply_dit);
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break;
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case HC2C_VIA_DFT:
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cld = X(mkplan_d)(
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plnr,
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X(mkproblem_dft_d)(
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X(mktensor_1d)(m, (r/2)*d[0].is, d[0].os),
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X(mktensor_2d)(
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r / 2, d[0].is, m * d[0].os,
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v, ivs, ovs),
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p->r0, p->r1, p->cr, p->ci)
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);
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if (!cld) goto nada;
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pln = MKPLAN_RDFT2(P, &padt, apply_dit_dft);
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break;
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}
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break;
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case HC2R:
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cldw = ego->mkcldw(ego, HC2R,
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r, m * d[0].is,
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m, d[0].is,
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v, ivs,
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p->cr, p->ci, plnr);
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if (!cldw) goto nada;
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switch (ego->hc2ckind) {
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case HC2C_VIA_RDFT:
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cld = X(mkplan_d)(
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plnr,
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X(mkproblem_rdft_1_d)(
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X(mktensor_1d)(m, d[0].is, (r/2)*d[0].os),
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X(mktensor_3d)(
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2, p->ci - p->cr, p->r1 - p->r0,
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r / 2, m * d[0].is, d[0].os,
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v, ivs, ovs),
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p->cr, p->r0, HC2R)
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);
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if (!cld) goto nada;
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pln = MKPLAN_RDFT2(P, &padt, apply_dif);
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break;
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case HC2C_VIA_DFT:
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cld = X(mkplan_d)(
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plnr,
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X(mkproblem_dft_d)(
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X(mktensor_1d)(m, d[0].is, (r/2)*d[0].os),
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X(mktensor_2d)(
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r / 2, m * d[0].is, d[0].os,
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v, ivs, ovs),
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p->ci, p->cr, p->r1, p->r0)
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);
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if (!cld) goto nada;
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pln = MKPLAN_RDFT2(P, &padt, apply_dif_dft);
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break;
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}
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break;
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default:
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A(0);
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}
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pln->cld = cld;
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pln->cldw = cldw;
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pln->r = r;
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X(ops_add)(&cld->ops, &cldw->ops, &pln->super.super.ops);
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/* inherit could_prune_now_p attribute from cldw */
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pln->super.super.could_prune_now_p = cldw->could_prune_now_p;
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return &(pln->super.super);
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nada:
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X(plan_destroy_internal)(cldw);
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X(plan_destroy_internal)(cld);
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return (plan *) 0;
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}
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hc2c_solver *X(mksolver_hc2c)(size_t size, INT r,
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hc2c_kind hc2ckind,
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hc2c_mkinferior mkcldw)
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{
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static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
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hc2c_solver *slv = (hc2c_solver *)X(mksolver)(size, &sadt);
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slv->r = r;
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slv->hc2ckind = hc2ckind;
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slv->mkcldw = mkcldw;
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return slv;
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}
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plan *X(mkplan_hc2c)(size_t size, const plan_adt *adt, hc2capply apply)
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{
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plan_hc2c *ego;
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ego = (plan_hc2c *) X(mkplan)(size, adt);
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ego->apply = apply;
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return &(ego->super);
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}
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