A concatination of the (FFTPACK)[https://netlib.org/fftpack/] library code. More...

Functions/Subroutines
subroutine	csfft (isign, n, scale, x, y, table, work, isys)
	csfft More...

subroutine	dcrft (init, x, ldx, y, ldy, n, m, isign, scale, table, n1, wrk, n2, z, nz)
	dcrft More...

subroutine	drcft (init, x, ldx, y, ldy, n, m, isign, scale, table, n1, wrk, n2, z, nz)
	drcft More...

subroutine	radb2 (IDO, L1, CC, CH, WA1)
	RADB2. More...

subroutine	radb3 (IDO, L1, CC, CH, WA1, WA2)
	RADB3 More...

subroutine	radb4 (IDO, L1, CC, CH, WA1, WA2, WA3)
	RADB4. More...

subroutine	radb5 (IDO, L1, CC, CH, WA1, WA2, WA3, WA4)
	RADB5. More...

subroutine	radbg (IDO, IP, L1, IDL1, CC, C1, C2, CH, CH2, WA)
	RADBG. More...

subroutine	radf2 (IDO, L1, CC, CH, WA1)
	RADBG. More...

subroutine	radf3 (IDO, L1, CC, CH, WA1, WA2)
	RADF3. More...

subroutine	radf4 (IDO, L1, CC, CH, WA1, WA2, WA3)
	RADF4. More...

subroutine	radf5 (IDO, L1, CC, CH, WA1, WA2, WA3, WA4)
	RADF5. More...

subroutine	radfg (IDO, IP, L1, IDL1, CC, C1, C2, CH, CH2, WA)
	RADFG. More...

subroutine	rfftb (N, R, WSAVE)
	RFFTB. More...

subroutine	rfftb1 (N, C, CH, WA, IFAC)
	RFFTB1. More...

subroutine	rfftf (N, R, WSAVE)
	RFFTF. More...

subroutine	rfftf1 (N, C, CH, WA, IFAC)
	RFFTF1. More...

subroutine	rffti (N, WSAVE)
	RFFTI. More...

subroutine	rffti1 (N, WA, IFAC)
	RFFTI1. More...

subroutine	scfft (isign, n, scale, x, y, table, work, isys)
	scfft More...

subroutine	scrft (init, x, ldx, y, ldy, n, m, isign, scale, table, n1, wrk, n2, z, nz)
	scrft More...

subroutine	srcft (init, x, ldx, y, ldy, n, m, isign, scale, table, n1, wrk, n2, z, nz)
	srcft More...

Detailed Description

A concatination of the (FFTPACK)[https://netlib.org/fftpack/] library code.

FFTPACK is a package of Fortran subprograms for the fast Fourier transform of periodic and other symmetric sequences. It includes complex, real, sine, cosine, and quarter-wave transforms.

Reference:

P.N. Swarztrauber, Vectorizing the FFTs, in Parallel Computations (G. Rodrigue, ed.), Academic Press, 1982, pp. 51–83.

Author
Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition in file fftpack.F.

Function/Subroutine Documentation

◆ csfft()

subroutine csfft	(	integer	isign,
		integer	n,
		real	scale,
		real, dimension(*)	x,
		real, dimension(*)	y,
		real, dimension(*)	table,
		real, dimension(*)	work,
		integer	isys
	)

csfft

Parameters

isign
n
scale
x
y
table
work
isys

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 116 of file fftpack.F.

References rfftb(), and rffti().

◆ dcrft()

subroutine dcrft	(	integer	init,
		real, dimension(2ldx,)	x,
		integer	ldx,
		real, dimension(ldy,*)	y,
		integer	ldy,
		integer	n,
		integer	m,
		integer	isign,
		real	scale,
		real, dimension(44002)	table,
		integer	n1,
		real	wrk,
		integer	n2,
		real	z,
		integer	nz
	)

dcrft

Parameters

init
x
ldx
y
ldy
n
m
isign
scale
table
n1
wrk
n2
z
nz

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 32 of file fftpack.F.

References rfftb(), and rffti().

Referenced by spffte().

◆ drcft()

subroutine drcft	(	integer	init,
		real, dimension(ldx,*)	x,
		integer	ldx,
		real, dimension(2ldy,)	y,
		integer	ldy,
		integer	n,
		integer	m,
		integer	isign,
		real	scale,
		real, dimension(44002)	table,
		integer	n1,
		real	wrk,
		integer	n2,
		real	z,
		integer	nz
	)

drcft

Parameters

init
x
ldx
y
ldy
n
m
isign
scale
table
n1
wrk
n2
z
nz

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 158 of file fftpack.F.

References rfftf(), and rffti().

Referenced by spffte().

◆ radb2()

subroutine radb2	(		IDO,
			L1,
		dimension(ido,2,l1)	CC,
		dimension(ido,l1,2)	CH,
		dimension(1)	WA1
	)

RADB2.

Parameters

IDO
L1
CC
CH
WA1

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 530 of file fftpack.F.

Referenced by rfftb1().

◆ radb3()

subroutine radb3	(		IDO,
			L1,
		dimension(ido,3,l1)	CC,
		dimension(ido,l1,3)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2
	)

RADB3

Parameters

IDO
L1
CC
CH
WA1
WA2

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 569 of file fftpack.F.

Referenced by rfftb1().

◆ radb4()

subroutine radb4	(		IDO,
			L1,
		dimension(ido,4,l1)	CC,
		dimension(ido,l1,4)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2,
		dimension(1)	WA3
	)

RADB4.

Parameters

IDO
L1
CC
CH
WA1
WA2
WA3

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 619 of file fftpack.F.

Referenced by rfftb1().

◆ radb5()

subroutine radb5	(		IDO,
			L1,
		dimension(ido,5,l1)	CC,
		dimension(ido,l1,5)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2,
		dimension(1)	WA3,
		dimension(1)	WA4
	)

RADB5.

Parameters

IDO
L1
CC
CH
WA1
WA2
WA3
WA4

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 690 of file fftpack.F.

Referenced by rfftb1().

◆ radbg()

subroutine radbg	(		IDO,
			IP,
			L1,
			IDL1,
		dimension(ido,ip,l1)	CC,
		dimension(ido,l1,ip)	C1,
		dimension(idl1,ip)	C2,
		dimension(ido,l1,ip)	CH,
		dimension(idl1,ip)	CH2,
		dimension(1)	WA
	)

RADBG.

Parameters

IDO
IP
L1
IDL1
CC
C1
C2
CH
CH2
WA

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 768 of file fftpack.F.

Referenced by rfftb1().

◆ radf2()

subroutine radf2	(		IDO,
			L1,
		dimension(ido,l1,2)	CC,
		dimension(ido,2,l1)	CH,
		dimension(1)	WA1
	)

RADBG.

Parameters

IDO
L1
CC
CH
WA1

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 946 of file fftpack.F.

Referenced by rfftf1().

◆ radf3()

subroutine radf3	(		IDO,
			L1,
		dimension(ido,l1,3)	CC,
		dimension(ido,3,l1)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2
	)

RADF3.

Parameters

IDO
L1
CC
CH
WA1
WA2

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 984 of file fftpack.F.

Referenced by rfftf1().

◆ radf4()

subroutine radf4	(		IDO,
			L1,
		dimension(ido,l1,4)	CC,
		dimension(ido,4,l1)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2,
		dimension(1)	WA3
	)

RADF4.

Parameters

IDO
L1
CC
CH
WA1
WA2
WA3

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 1031 of file fftpack.F.

Referenced by rfftf1().

◆ radf5()

subroutine radf5	(		IDO,
			L1,
		dimension(ido,l1,5)	CC,
		dimension(ido,5,l1)	CH,
		dimension(1)	WA1,
		dimension(1)	WA2,
		dimension(1)	WA3,
		dimension(1)	WA4
	)

RADF5.

Parameters

IDO
L1
CC
CH
WA1
WA2
WA3
WA4

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 1098 of file fftpack.F.

Referenced by rfftf1().

◆ radfg()

subroutine radfg	(		IDO,
			IP,
			L1,
			IDL1,
		dimension(ido,ip,l1)	CC,
		dimension(ido,l1,ip)	C1,
		dimension(idl1,ip)	C2,
		dimension(ido,l1,ip)	CH,
		dimension(idl1,ip)	CH2,
		dimension(1)	WA
	)

RADFG.

Parameters

IDO
IP
L1
IDL1
CC
C1
C2
CH
CH2
WA

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 1172 of file fftpack.F.

Referenced by rfftf1().

◆ rfftb()

subroutine rfftb	(		N,
		dimension(1)	R,
		dimension(1)	WSAVE
	)

RFFTB.

Parameters

N
R
WSAVE

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 296 of file fftpack.F.

References rfftb1().

Referenced by csfft(), dcrft(), and scrft().

◆ rfftb1()

subroutine rfftb1	(		N,
		dimension(1)	C,
		dimension(1)	CH,
		dimension(1)	WA,
		dimension(*)	IFAC
	)

RFFTB1.

Parameters

N
C
CH
WA
IFAC

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 325 of file fftpack.F.

References radb2(), radb3(), radb4(), radb5(), and radbg().

Referenced by rfftb().

◆ rfftf()

subroutine rfftf	(		N,
		dimension(1)	R,
		dimension(1)	WSAVE
	)

RFFTF.

Parameters

N
R
WSAVE

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 282 of file fftpack.F.

References rfftf1().

Referenced by drcft(), scfft(), and srcft().

◆ rfftf1()

subroutine rfftf1	(		N,
		dimension(1)	C,
		dimension(1)	CH,
		dimension(1)	WA,
		dimension(*)	IFAC
	)

RFFTF1.

Parameters

N
C
CH
WA
IFAC

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 394 of file fftpack.F.

References radf2(), radf3(), radf4(), radf5(), and radfg().

Referenced by rfftf().

◆ rffti()

subroutine rffti	(		N,
		dimension(1)	WSAVE
	)

RFFTI.

Parameters

N
WSAVE

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 309 of file fftpack.F.

References rffti1().

Referenced by csfft(), dcrft(), drcft(), scfft(), scrft(), and srcft().

◆ rffti1()

subroutine rffti1	(		N,
		dimension(1)	WA,
		dimension(*)	IFAC
	)

RFFTI1.

Parameters

N
WA
IFAC

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 461 of file fftpack.F.

Referenced by rffti().

◆ scfft()

subroutine scfft	(	integer	isign,
		integer	n,
		real	scale,
		real, dimension(*)	x,
		real, dimension(*)	y,
		real, dimension(*)	table,
		real, dimension(*)	work,
		integer	isys
	)

scfft

Parameters

isign
n
scale
x
y
table
work
isys

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 249 of file fftpack.F.

References rfftf(), and rffti().

◆ scrft()

subroutine scrft	(	integer	init,
		real, dimension(2ldx,)	x,
		integer	ldx,
		real, dimension(ldy,*)	y,
		integer	ldy,
		integer	n,
		integer	m,
		integer	isign,
		real	scale,
		real, dimension(44002)	table,
		integer	n1,
		real	wrk,
		integer	n2,
		real	z,
		integer	nz
	)

scrft

Parameters

init
x
ldx
y
ldy
n
m
isign
scale
table
n1
wrk
n2
z
nz

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 78 of file fftpack.F.

References rfftb(), and rffti().

Referenced by spfft(), spfft1(), and spffte().

◆ srcft()

subroutine srcft	(	integer	init,
		real, dimension(ldx,*)	x,
		integer	ldx,
		real, dimension(2ldy,)	y,
		integer	ldy,
		integer	n,
		integer	m,
		integer	isign,
		real	scale,
		real, dimension(44002)	table,
		integer	n1,
		real	wrk,
		integer	n2,
		real	z,
		integer	nz
	)

srcft

Parameters

init
x
ldx
y
ldy
n
m
isign
scale
table
n1
wrk
n2
z
nz

Author: Paul N. Swarztrauber, National Center for Atmospheric Research, Boulder, CO

Definition at line 207 of file fftpack.F.

References rfftf(), and rffti().

Referenced by spfft(), spfft1(), and spffte().

Functions/Subroutines

Detailed Description

Function/Subroutine Documentation

◆ csfft()

◆ dcrft()

◆ drcft()

◆ radb2()

◆ radb3()

◆ radb4()

◆ radb5()

◆ radbg()

◆ radf2()

◆ radf3()

◆ radf4()

◆ radf5()

◆ radfg()

◆ rfftb()

◆ rfftb1()

◆ rfftf()

◆ rfftf1()

◆ rffti()

◆ rffti1()

◆ scfft()

◆ scrft()

◆ srcft()