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/*
* Copyright (c) 1997-1999, 2003 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "fftw_threads-int.h"
#include "rfftw_threads.h"
/********************** prototypes for rexec2 routines **********************/
extern void rfftw_hc2c(int n, fftw_real *in, fftw_complex *out, int ostride);
extern void rfftw_c2hc(int n, fftw_complex *in, int istride, fftw_real *out);
extern void rfftw_real2c_aux(fftw_plan plan, int howmany,
fftw_real *in, int istride, int idist,
fftw_complex *out, int ostride, int odist,
fftw_real *work);
extern void rfftw_c2real_aux(fftw_plan plan, int howmany,
fftw_complex *in, int istride, int idist,
fftw_real *out, int ostride, int odist,
fftw_real *work);
extern void rfftw_real2c_overlap_aux(fftw_plan plan, int howmany,
fftw_real *in, int istride, int idist,
fftw_complex *out, int ostride, int odist,
fftw_real *work);
extern void rfftw_c2real_overlap_aux(fftw_plan plan, int howmany,
fftw_complex *in, int istride, int idist,
fftw_real *out, int ostride, int odist,
fftw_real *work);
/***************************************************************************/
typedef struct {
fftw_plan plan;
void *in;
int istride, idist;
void *out;
int ostride, odist;
fftw_real *work;
} rexec2_thread_data;
static void *real2c_aux_thread(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
rfftw_real2c_aux(d->plan, ldata->max - ldata->min,
ldata->min * d->idist + (fftw_real *) d->in,
d->istride, d->idist,
ldata->min * d->odist + (fftw_complex *) d->out,
d->ostride, d->odist,
d->work + d->plan->n * ldata->thread_num);
return 0;
}
static void *c2real_aux_thread(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
rfftw_c2real_aux(d->plan, ldata->max - ldata->min,
ldata->min * d->idist + (fftw_complex *) d->in,
d->istride, d->idist,
ldata->min * d->odist + (fftw_real *) d->out,
d->ostride, d->odist,
d->work + d->plan->n * ldata->thread_num);
return 0;
}
static void *real2c_overlap_aux_thread1(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
int n = d->plan->n;
rfftw(d->plan, ldata->max - ldata->min,
ldata->min * d->idist + (fftw_real *) d->in,
d->istride, d->idist,
d->work + n * ldata->min, 1, n);
return 0;
}
static void *real2c_overlap_aux_thread2(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
int min = ldata->min, max = ldata->max;
int n = d->plan->n;
fftw_complex *out = (fftw_complex *) d->out;
int ostride = d->ostride, odist = d->odist;
fftw_real *work = d->work;
for (; min < max; ++min)
rfftw_hc2c(n, work + min*n, out + min*odist, ostride);
return 0;
}
static void *c2real_overlap_aux_thread2(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
int n = d->plan->n;
rfftw(d->plan, ldata->max - ldata->min,
d->work + n * ldata->min, 1, n,
ldata->min * d->odist + (fftw_real *) d->out,
d->ostride, d->odist);
return 0;
}
static void *c2real_overlap_aux_thread1(fftw_loop_data *ldata)
{
rexec2_thread_data *d = (rexec2_thread_data *) ldata->data;
int min = ldata->min, max = ldata->max;
int n = d->plan->n;
fftw_complex *in = (fftw_complex *) d->in;
int istride = d->istride, idist = d->idist;
fftw_real *work = d->work;
for (; min < max; ++min)
rfftw_c2hc(n, in + min*idist, istride, work + min*n);
return 0;
}
void rfftw_real2c_threads_aux(fftw_plan plan, int howmany,
fftw_real *in, int istride, int idist,
fftw_complex *out, int ostride, int odist,
fftw_real *work,
int nthreads)
{
rexec2_thread_data d;
d.plan = plan;
d.in = in;
d.istride = istride;
d.idist = idist;
d.out = out;
d.ostride = ostride;
d.odist = odist;
d.work = work;
fftw_thread_spawn_loop(howmany, nthreads, real2c_aux_thread, &d);
}
void rfftw_c2real_threads_aux(fftw_plan plan, int howmany,
fftw_complex *in, int istride, int idist,
fftw_real *out, int ostride, int odist,
fftw_real *work,
int nthreads)
{
rexec2_thread_data d;
d.plan = plan;
d.in = in;
d.istride = istride;
d.idist = idist;
d.out = out;
d.ostride = ostride;
d.odist = odist;
d.work = work;
fftw_thread_spawn_loop(howmany, nthreads, c2real_aux_thread, &d);
}
void rfftw_real2c_overlap_threads_aux(fftw_plan plan, int howmany,
fftw_real *in, int istride, int idist,
fftw_complex *out, int ostride, int odist,
fftw_real *work,
int nthreads)
{
rexec2_thread_data d;
d.plan = plan;
d.in = in;
d.istride = istride;
d.idist = idist;
d.out = out;
d.ostride = ostride;
d.odist = odist;
d.work = work;
fftw_thread_spawn_loop(howmany, nthreads, real2c_overlap_aux_thread1, &d);
fftw_thread_spawn_loop(howmany, nthreads, real2c_overlap_aux_thread2, &d);
}
void rfftw_c2real_overlap_threads_aux(fftw_plan plan, int howmany,
fftw_complex *in, int istride, int idist,
fftw_real *out, int ostride, int odist,
fftw_real *work,
int nthreads)
{
rexec2_thread_data d;
d.plan = plan;
d.in = in;
d.istride = istride;
d.idist = idist;
d.out = out;
d.ostride = ostride;
d.odist = odist;
d.work = work;
fftw_thread_spawn_loop(howmany, nthreads, c2real_overlap_aux_thread1, &d);
fftw_thread_spawn_loop(howmany, nthreads, c2real_overlap_aux_thread2, &d);
}
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