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pypocketfft
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Martin Reinecke
pypocketfft
Commits
598e9765
Commit
598e9765
authored
Jul 26, 2019
by
Martin Reinecke
Browse files
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more cleanups
parent
30c887d1
Changes
1
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1 changed file
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56 additions
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78 deletions
+56
-78
pocketfft_hdronly.h
pocketfft_hdronly.h
+56
-78
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pocketfft_hdronly.h
View file @
598e9765
...
...
@@ -198,6 +198,8 @@ template<typename T> struct cmplx {
cmplx
(
T
r_
,
T
i_
)
:
r
(
r_
),
i
(
i_
)
{}
void
Set
(
T
r_
,
T
i_
)
{
r
=
r_
;
i
=
i_
;
}
void
Set
(
T
r_
)
{
r
=
r_
;
i
=
T
(
0
);
}
void
Split
(
T
&
r_
,
T
&
i_
)
const
{
r_
=
r
;
i_
=
i
;
}
void
SplitConj
(
T
&
r_
,
T
&
i_
)
const
{
r_
=
r
;
i_
=-
i
;
}
cmplx
&
operator
+=
(
const
cmplx
&
other
)
{
r
+=
other
.
r
;
i
+=
other
.
i
;
return
*
this
;
}
template
<
typename
T2
>
cmplx
&
operator
*=
(
T2
other
)
...
...
@@ -2348,10 +2350,7 @@ template<typename T0> class T_dst1
arr
<
T
>
tmp
(
N
);
tmp
[
0
]
=
tmp
[
n
+
1
]
=
c
[
0
]
*
0
;
for
(
size_t
i
=
0
;
i
<
n
;
++
i
)
{
tmp
[
i
+
1
]
=
c
[
i
];
tmp
[
N
-
1
-
i
]
=
-
c
[
i
];
}
{
tmp
[
i
+
1
]
=
c
[
i
];
tmp
[
N
-
1
-
i
]
=-
c
[
i
];
}
fftplan
.
forward
(
tmp
.
data
(),
fct
);
for
(
size_t
i
=
0
;
i
<
n
;
++
i
)
c
[
i
]
=
-
tmp
[
2
*
i
+
2
];
...
...
@@ -2366,63 +2365,6 @@ template<typename T0> class T_dcst23
pocketfft_r
<
T0
>
fftplan
;
vector
<
T0
>
twiddle
;
template
<
typename
T
>
POCKETFFT_NOINLINE
void
exec2
(
T
c
[],
T0
fct
,
bool
ortho
,
bool
cosine
)
const
{
constexpr
T0
sqrt2
=
T0
(
1.414213562373095048801688724209698
L
);
size_t
N
=
length
();
size_t
NS2
=
(
N
+
1
)
/
2
;
if
(
!
cosine
)
for
(
size_t
k
=
1
;
k
<
N
;
k
+=
2
)
c
[
k
]
=
-
c
[
k
];
for
(
size_t
k
=
1
;
k
<
N
-
1
;
k
+=
2
)
{
T
tmp
=
T0
(
0.5
)
*
(
c
[
k
]
+
c
[
k
+
1
]);
c
[
k
+
1
]
=
T0
(
0.5
)
*
(
c
[
k
+
1
]
-
c
[
k
]);
c
[
k
]
=
tmp
;
}
fftplan
.
backward
(
c
,
fct
);
for
(
size_t
k
=
1
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
{
T
t1
=
twiddle
[
k
-
1
]
*
c
[
kc
]
+
twiddle
[
kc
-
1
]
*
c
[
k
];
T
t2
=
twiddle
[
k
-
1
]
*
c
[
k
]
-
twiddle
[
kc
-
1
]
*
c
[
kc
];
c
[
k
]
=
t1
+
t2
;
c
[
kc
]
=
t1
-
t2
;
}
if
((
N
&
1
)
==
0
)
c
[
NS2
]
=
twiddle
[
NS2
-
1
]
*
(
c
[
NS2
]
+
c
[
NS2
]);
c
[
0
]
*=
2
;
if
(
!
cosine
)
for
(
size_t
k
=
0
,
kc
=
N
-
1
;
k
<
kc
;
++
k
,
--
kc
)
swap
(
c
[
k
],
c
[
kc
]);
if
(
ortho
)
c
[
0
]
/=
sqrt2
;
}
template
<
typename
T
>
POCKETFFT_NOINLINE
void
exec3
(
T
c
[],
T0
fct
,
bool
ortho
,
bool
cosine
)
const
{
constexpr
T0
sqrt2
=
T0
(
1.414213562373095048801688724209698
L
);
size_t
N
=
length
();
size_t
NS2
=
(
N
+
1
)
/
2
;
if
(
ortho
)
c
[
0
]
*=
sqrt2
;
if
(
!
cosine
)
for
(
size_t
k
=
0
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
swap
(
c
[
k
],
c
[
kc
]);
for
(
size_t
k
=
1
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
{
T
t1
=
c
[
k
]
+
c
[
kc
],
t2
=
c
[
k
]
-
c
[
kc
];
c
[
k
]
=
twiddle
[
k
-
1
]
*
t2
+
twiddle
[
kc
-
1
]
*
t1
;
c
[
kc
]
=
twiddle
[
k
-
1
]
*
t1
-
twiddle
[
kc
-
1
]
*
t2
;
}
if
((
N
&
1
)
==
0
)
c
[
NS2
]
=
2
*
twiddle
[
NS2
-
1
]
*
c
[
NS2
];
fftplan
.
forward
(
c
,
fct
);
for
(
size_t
k
=
1
;
k
<
N
-
1
;
k
+=
2
)
MPINPLACE
(
c
[
k
],
c
[
k
+
1
]);
if
(
!
cosine
)
for
(
size_t
k
=
1
;
k
<
N
;
k
+=
2
)
c
[
k
]
=
-
c
[
k
];
}
public:
POCKETFFT_NOINLINE
T_dcst23
(
size_t
length
)
:
fftplan
(
length
),
twiddle
(
length
)
...
...
@@ -2434,7 +2376,55 @@ template<typename T0> class T_dcst23
template
<
typename
T
>
POCKETFFT_NOINLINE
void
exec
(
T
c
[],
T0
fct
,
bool
ortho
,
int
type
,
bool
cosine
)
const
{
type
==
2
?
exec2
(
c
,
fct
,
ortho
,
cosine
)
:
exec3
(
c
,
fct
,
ortho
,
cosine
);
}
{
constexpr
T0
sqrt2
=
T0
(
1.414213562373095048801688724209698
L
);
size_t
N
=
length
();
size_t
NS2
=
(
N
+
1
)
/
2
;
if
(
type
==
2
)
{
if
(
!
cosine
)
for
(
size_t
k
=
1
;
k
<
N
;
k
+=
2
)
c
[
k
]
=
-
c
[
k
];
c
[
0
]
*=
2
;
if
((
N
&
1
)
==
0
)
c
[
N
-
1
]
*=
2
;
for
(
size_t
k
=
1
;
k
<
N
-
1
;
k
+=
2
)
MPINPLACE
(
c
[
k
+
1
],
c
[
k
]);
fftplan
.
backward
(
c
,
fct
);
for
(
size_t
k
=
1
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
{
T
t1
=
twiddle
[
k
-
1
]
*
c
[
kc
]
+
twiddle
[
kc
-
1
]
*
c
[
k
];
T
t2
=
twiddle
[
k
-
1
]
*
c
[
k
]
-
twiddle
[
kc
-
1
]
*
c
[
kc
];
c
[
k
]
=
T0
(
0.5
)
*
(
t1
+
t2
);
c
[
kc
]
=
T0
(
0.5
)
*
(
t1
-
t2
);
}
if
((
N
&
1
)
==
0
)
c
[
NS2
]
*=
twiddle
[
NS2
-
1
];
if
(
!
cosine
)
for
(
size_t
k
=
0
,
kc
=
N
-
1
;
k
<
kc
;
++
k
,
--
kc
)
swap
(
c
[
k
],
c
[
kc
]);
if
(
ortho
)
c
[
0
]
/=
sqrt2
;
}
else
{
if
(
ortho
)
c
[
0
]
*=
sqrt2
;
if
(
!
cosine
)
for
(
size_t
k
=
0
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
swap
(
c
[
k
],
c
[
kc
]);
for
(
size_t
k
=
1
,
kc
=
N
-
1
;
k
<
NS2
;
++
k
,
--
kc
)
{
T
t1
=
c
[
k
]
+
c
[
kc
],
t2
=
c
[
k
]
-
c
[
kc
];
c
[
k
]
=
twiddle
[
k
-
1
]
*
t2
+
twiddle
[
kc
-
1
]
*
t1
;
c
[
kc
]
=
twiddle
[
k
-
1
]
*
t1
-
twiddle
[
kc
-
1
]
*
t2
;
}
if
((
N
&
1
)
==
0
)
c
[
NS2
]
*=
2
*
twiddle
[
NS2
-
1
];
fftplan
.
forward
(
c
,
fct
);
for
(
size_t
k
=
1
;
k
<
N
-
1
;
k
+=
2
)
MPINPLACE
(
c
[
k
],
c
[
k
+
1
]);
if
(
!
cosine
)
for
(
size_t
k
=
1
;
k
<
N
;
k
+=
2
)
c
[
k
]
=
-
c
[
k
];
}
}
size_t
length
()
const
{
return
fftplan
.
length
();
}
};
...
...
@@ -3120,17 +3110,11 @@ template<typename T> POCKETFFT_NOINLINE void general_c2r(
if
(
forward
)
for
(;
i
<
len
-
1
;
i
+=
2
,
++
ii
)
for
(
size_t
j
=
0
;
j
<
vlen
;
++
j
)
{
tdatav
[
i
][
j
]
=
in
[
it
.
iofs
(
j
,
ii
)].
r
;
tdatav
[
i
+
1
][
j
]
=
-
in
[
it
.
iofs
(
j
,
ii
)].
i
;
}
in
[
it
.
iofs
(
j
,
ii
)].
SplitConj
(
tdatav
[
i
][
j
],
tdatav
[
i
+
1
][
j
]);
else
for
(;
i
<
len
-
1
;
i
+=
2
,
++
ii
)
for
(
size_t
j
=
0
;
j
<
vlen
;
++
j
)
{
tdatav
[
i
][
j
]
=
in
[
it
.
iofs
(
j
,
ii
)].
r
;
tdatav
[
i
+
1
][
j
]
=
in
[
it
.
iofs
(
j
,
ii
)].
i
;
}
in
[
it
.
iofs
(
j
,
ii
)].
Split
(
tdatav
[
i
][
j
],
tdatav
[
i
+
1
][
j
]);
if
(
i
<
len
)
for
(
size_t
j
=
0
;
j
<
vlen
;
++
j
)
tdatav
[
i
][
j
]
=
in
[
it
.
iofs
(
j
,
ii
)].
r
;
...
...
@@ -3150,16 +3134,10 @@ template<typename T> POCKETFFT_NOINLINE void general_c2r(
size_t
i
=
1
,
ii
=
1
;
if
(
forward
)
for
(;
i
<
len
-
1
;
i
+=
2
,
++
ii
)
{
tdata
[
i
]
=
in
[
it
.
iofs
(
ii
)].
r
;
tdata
[
i
+
1
]
=
-
in
[
it
.
iofs
(
ii
)].
i
;
}
in
[
it
.
iofs
(
ii
)].
SplitConj
(
tdata
[
i
],
tdata
[
i
+
1
]);
else
for
(;
i
<
len
-
1
;
i
+=
2
,
++
ii
)
{
tdata
[
i
]
=
in
[
it
.
iofs
(
ii
)].
r
;
tdata
[
i
+
1
]
=
in
[
it
.
iofs
(
ii
)].
i
;
}
in
[
it
.
iofs
(
ii
)].
Split
(
tdata
[
i
],
tdata
[
i
+
1
]);
if
(
i
<
len
)
tdata
[
i
]
=
in
[
it
.
iofs
(
ii
)].
r
;
}
...
...
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