zcnvcor2(3P) Sun Performance Library zcnvcor2(3P)NAMEzcnvcor2 - compute the convolution or correlation of complex matrices
SYNOPSIS
SUBROUTINE ZCNVCOR2(CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY,
SCRATCHY, MX, NX, X, LDX, MY, NY, MPRE, NPRE, Y, LDY, MZ, NZ, Z,
LDZ, WORKIN, LWORK)
CHARACTER * 1 CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY, SCRATCHY
DOUBLE COMPLEX X(LDX,*), Y(LDY,*), Z(LDZ,*), WORKIN(*)
INTEGER MX, NX, LDX, MY, NY, MPRE, NPRE, LDY, MZ, NZ, LDZ, LWORK
SUBROUTINE ZCNVCOR2_64(CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY,
SCRATCHY, MX, NX, X, LDX, MY, NY, MPRE, NPRE, Y, LDY, MZ, NZ, Z,
LDZ, WORKIN, LWORK)
CHARACTER * 1 CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY, SCRATCHY
DOUBLE COMPLEX X(LDX,*), Y(LDY,*), Z(LDZ,*), WORKIN(*)
INTEGER*8 MX, NX, LDX, MY, NY, MPRE, NPRE, LDY, MZ, NZ, LDZ, LWORK
F95 INTERFACE
SUBROUTINE CNVCOR2(CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY,
SCRATCHY, [MX], [NX], X, [LDX], [MY], [NY], MPRE, NPRE, Y, [LDY],
[MZ], [NZ], Z, [LDZ], WORKIN, [LWORK])
CHARACTER(LEN=1) :: CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY, SCRATCHY
COMPLEX(8), DIMENSION(:) :: WORKIN
COMPLEX(8), DIMENSION(:,:) :: X, Y, Z
INTEGER :: MX, NX, LDX, MY, NY, MPRE, NPRE, LDY, MZ, NZ, LDZ, LWORK
SUBROUTINE CNVCOR2_64(CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY,
SCRATCHY, [MX], [NX], X, [LDX], [MY], [NY], MPRE, NPRE, Y, [LDY],
[MZ], [NZ], Z, [LDZ], WORKIN, [LWORK])
CHARACTER(LEN=1) :: CNVCOR, METHOD, TRANSX, SCRATCHX, TRANSY, SCRATCHY
COMPLEX(8), DIMENSION(:) :: WORKIN
COMPLEX(8), DIMENSION(:,:) :: X, Y, Z
INTEGER(8) :: MX, NX, LDX, MY, NY, MPRE, NPRE, LDY, MZ, NZ, LDZ, LWORK
C INTERFACE
#include <sunperf.h>
void zcnvcor2(char cnvcor, char method, char transx, char scratchx,
char transy, char scratchy, int mx, int nx, doublecomplex *x,
int ldx, int my, int ny, int mpre, int npre, doublecomplex
*y, int ldy, int mz, int nz, doublecomplex *z, int ldz, dou‐
blecomplex *workin, int lwork);
void zcnvcor2_64(char cnvcor, char method, char transx, char scratchx,
char transy, char scratchy, long mx, long nx, doublecomplex
*x, long ldx, long my, long ny, long mpre, long npre, double‐
complex *y, long ldy, long mz, long nz, doublecomplex *z,
long ldz, doublecomplex *workin, long lwork);
PURPOSEzcnvcor2 computes the convolution or correlation of complex matrices.
ARGUMENTS
CNVCOR (input)
´V' or 'v' to compute convolution, 'R' or 'r' to compute cor‐
relation.
METHOD (input)
´T' or 't' if the Fourier transform method is to be used, 'D'
or 'd' to compute directly from the definition.
TRANSX (input)
´N' or 'n' if X is the filter matrix, 'T' or 't' if trans‐
pose(X) is the filter matrix.
SCRATCHX (input)
´N' or 'n' if X must be preserved, 'S' or 's' if X can be
used as scratch space. The contents of X are undefined after
returning from a call in which X is allowed to be used for
scratch.
TRANSY (input)
´N' or 'n' if Y is the input matrix, 'T' or 't' if trans‐
pose(Y) is the input matrix.
SCRATCHY (input)
´N' or 'n' if Y must be preserved, 'S' or 's' if Y can be
used as scratch space. The contents of Y are undefined after
returning from a call in which Y is allowed to be used for
scratch.
MX (input)
Number of rows in the filter matrix. MX >= 0.
NX (input)
Number of columns in the filter matrix. NX >= 0.
X (input)
dimension(LDX,NX)
On entry, the filter matrix. Unchanged on exit if SCRATCHX
is 'N' or 'n', undefined on exit if SCRATCHX is 'S' or 's'.
LDX (input)
Leading dimension of the array that contains the filter
matrix.
MY (input)
Number of rows in the input matrix. MY >= 0.
NY (input)
Number of columns in the input matrix. NY >= 0.
MPRE (input)
Number of implicit zeros to prepend to each row of the input
matrix. MPRE >= 0.
NPRE (input)
Number of implicit zeros to prepend to each column of the
input matrix. NPRE >= 0.
Y (input)
dimension(LDY,*)
Input matrix. Unchanged on exit if SCRATCHY is 'N' or 'n',
undefined on exit if SCRATCHY is 'S' or 's'.
LDY (input)
Leading dimension of the array that contains the input
matrix.
MZ (input)
Number of rows in the output matrix. MZ >= 0. ZCNVCOR2 will
return immediately if MZ = 0.
NZ (input)
Number of columns in the output matrix. NZ >= 0. ZCNVCOR2
will return immediately if NZ = 0.
Z (output)
dimension(LDZ,*)
Result matrix.
LDZ (input)
Leading dimension of the array that contains the result
matrix. LDZ >= MAX(1,MZ).
WORKIN (input/output)
(input/scratch) dimension(LWORK)
On entry for the first call to ZCNVCOR2, WORKIN(1) must con‐
tain CMPLX(0.0,0.0). After the first call, WORKIN(1) must be
set to CMPLX(0.0,0.0) iff WORKIN has been altered since the
last call to this subroutine or if the sizes of the arrays
have changed.
LWORK (input)
Length of the work vector. If the FFT is to be used then for
best performance LWORK should be at least 30 words longer
than the amount of memory needed to hold the trig tables. If
the FFT is not used, the value of LWORK is unimportant.
6 Mar 2009 zcnvcor2(3P)
