/* user interface */
void fftw(fftw_plan plan, int howmany, fftw_complex *in, int istride,
int idist, fftw_complex *out, int ostride, int odist)
{
int n = plan->n;
if (plan->flags & FFTW_IN_PLACE) {
if (howmany == 1) {
executor_simple_inplace(n, in, out, plan->root, istride,
plan->recurse_kind);
} else {
executor_many_inplace(n, in, out, plan->root, istride, howmany,
idist, plan->recurse_kind);
}
} else {
if (howmany == 1) {
fftw_executor_simple(n, in, out, plan->root, istride, ostride,
plan->recurse_kind);
} else {
#ifdef FFTW_ENABLE_VECTOR_RECURSE
int vector_size = plan->vector_size;
if (vector_size <= 1)
#endif
executor_many(n, in, out, plan->root, istride, ostride,
howmany, idist, odist, plan->recurse_kind);
#ifdef FFTW_ENABLE_VECTOR_RECURSE
else {
int s;
int num_vects = howmany / vector_size;
fftw_plan_node *root = plan->root;
for (s = 0; s < num_vects; ++s)
executor_many_vector(n,
in + s * (vector_size * idist),
out + s * (vector_size * odist),
root,
istride, ostride,
vector_size, idist, odist);
s = howmany % vector_size;
if (s > 0)
executor_many(n,
in + num_vects * (vector_size * idist),
out + num_vects * (vector_size * odist),
root,
istride, ostride,
s, idist, odist,
FFTW_NORMAL_RECURSE);
}
#endif
}
}
}
/*
* Do *not* declare simple executor static--we need to call it
* from other files...also, preface its name with "fftw_"
* to avoid any possible name collisions.
*/
void fftw_executor_simple(int n, const fftw_complex *in,
fftw_complex *out,
fftw_plan_node *p,
int istride,
int ostride,
fftw_recurse_kind recurse_kind)
{
switch (p->type) {
case FFTW_NOTW:
HACK_ALIGN_STACK_ODD;
(p->nodeu.notw.codelet)(in, out, istride, ostride);
break;
case FFTW_TWIDDLE:
{
int r = p->nodeu.twiddle.size;
int m = n / r;
fftw_twiddle_codelet *codelet;
fftw_complex *W;
#ifdef FFTW_ENABLE_VECTOR_RECURSE
if (recurse_kind == FFTW_NORMAL_RECURSE)
#endif
executor_many(m, in, out,
p->nodeu.twiddle.recurse,
istride * r, ostride,
r, istride, m * ostride,
FFTW_NORMAL_RECURSE);
#ifdef FFTW_ENABLE_VECTOR_RECURSE
else
executor_many_vector(m, in, out,
p->nodeu.twiddle.recurse,
istride * r, ostride,
r, istride, m * ostride);
#endif
codelet = p->nodeu.twiddle.codelet;
W = p->nodeu.twiddle.tw->twarray;
HACK_ALIGN_STACK_EVEN;
codelet(out, W, m * ostride, m, ostride);
break;
}
case FFTW_GENERIC:
{
int r = p->nodeu.generic.size;
int m = n / r;
fftw_generic_codelet *codelet;
fftw_complex *W;
#ifdef FFTW_ENABLE_VECTOR_RECURSE
if (recurse_kind == FFTW_NORMAL_RECURSE)
#endif
executor_many(m, in, out,
p->nodeu.generic.recurse,
istride * r, ostride,
r, istride, m * ostride,
FFTW_NORMAL_RECURSE);
#ifdef FFTW_ENABLE_VECTOR_RECURSE
else
executor_many_vector(m, in, out,
p->nodeu.generic.recurse,
istride * r, ostride,
r, istride, m * ostride);
#endif
codelet = p->nodeu.generic.codelet;
W = p->nodeu.generic.tw->twarray;
codelet(out, W, m, r, n, ostride);
break;
}
case FFTW_RADER:
{
int r = p->nodeu.rader.size;
int m = n / r;
fftw_rader_codelet *codelet;
fftw_complex *W;
#ifdef FFTW_ENABLE_VECTOR_RECURSE
if (recurse_kind == FFTW_NORMAL_RECURSE)
#endif
executor_many(m, in, out,
p->nodeu.rader.recurse,
istride * r, ostride,
r, istride, m * ostride,
FFTW_NORMAL_RECURSE);
#ifdef FFTW_ENABLE_VECTOR_RECURSE
else
executor_many_vector(m, in, out,
p->nodeu.rader.recurse,
istride * r, ostride,
r, istride, m * ostride);
#endif
codelet = p->nodeu.rader.codelet;
W = p->nodeu.rader.tw->twarray;
codelet(out, W, m, r, ostride,
p->nodeu.rader.rader_data);
break;
}
default:
fftw_die("BUG in executor: invalid plan\n");
break;
}
}
