dtrttp (3p)

Name

dtrttp - copy a triangular matrix from the standard full format (TR) to the standard packed format (TP)

Synopsis

SUBROUTINE DTRTTP( UPLO, N, A, LDA, AP, INFO )


CHARACTER*1 UPLO

INTEGER INFO, N, LDA

DOUBLE PRECISION A(LDA,*), AP(*)


SUBROUTINE DTRTTP_64( UPLO, N, A, LDA, AP, INFO )


CHARACTER*1 UPLO

INTEGER*8 INFO, N, LDA

DOUBLE PRECISION A(LDA,*), AP(*)


F95 INTERFACE
SUBROUTINE TRTTP( UPLO, N, A, LDA, AP, INFO )


INTEGER :: N, LDA, INFO

CHARACTER(LEN=1) :: UPLO

REAL(8), DIMENSION(:,:) :: A

REAL(8), DIMENSION(:) :: AP


SUBROUTINE TRTTP_64( UPLO, N, A, LDA, AP, INFO )


INTEGER(8) :: N, LDA, INFO

CHARACTER(LEN=1) :: UPLO

REAL(8), DIMENSION(:,:) :: A

REAL(8), DIMENSION(:) :: AP


C INTERFACE
#include <sunperf.h>

void dtrttp (char uplo, int n, double *a,  int  lda,  double  *ap,  int
*info);


void  dtrttp_64  (char  uplo,  long n, double *a, long lda, double *ap,
long *info);

Description

Oracle Solaris Studio Performance Library                           dtrttp(3P)



NAME
       dtrttp - copy a triangular matrix from the standard full format (TR) to
       the standard packed format (TP)


SYNOPSIS
       SUBROUTINE DTRTTP( UPLO, N, A, LDA, AP, INFO )


       CHARACTER*1 UPLO

       INTEGER INFO, N, LDA

       DOUBLE PRECISION A(LDA,*), AP(*)


       SUBROUTINE DTRTTP_64( UPLO, N, A, LDA, AP, INFO )


       CHARACTER*1 UPLO

       INTEGER*8 INFO, N, LDA

       DOUBLE PRECISION A(LDA,*), AP(*)


   F95 INTERFACE
       SUBROUTINE TRTTP( UPLO, N, A, LDA, AP, INFO )


       INTEGER :: N, LDA, INFO

       CHARACTER(LEN=1) :: UPLO

       REAL(8), DIMENSION(:,:) :: A

       REAL(8), DIMENSION(:) :: AP


       SUBROUTINE TRTTP_64( UPLO, N, A, LDA, AP, INFO )


       INTEGER(8) :: N, LDA, INFO

       CHARACTER(LEN=1) :: UPLO

       REAL(8), DIMENSION(:,:) :: A

       REAL(8), DIMENSION(:) :: AP


   C INTERFACE
       #include <sunperf.h>

       void dtrttp (char uplo, int n, double *a,  int  lda,  double  *ap,  int
                 *info);


       void  dtrttp_64  (char  uplo,  long n, double *a, long lda, double *ap,
                 long *info);


PURPOSE
       dtrttp copies a triangular matrix A from full format (TR)  to  standard
       packed format (TP).


ARGUMENTS
       UPLO (input)
                 UPLO is CHARACTER*1
                 = 'U':  A is upper triangular.
                 = 'L':  A is lower triangular.


       N (input)
                 N is INTEGER
                 The order of the matrices AP and A.  N >= 0.


       A (input)
                 A is DOUBLE PRECISION array, dimension (LDA,N)
                 On exit, the triangular matrix A.  If UPLO = 'U', the leading
                 N-by-N upper triangular part of A contains the upper
                 triangular part of the matrix A, and the strictly lower
                 triangular part of A is not referenced.  If UPLO = 'L', the
                 leading N-by-N lower triangular part of A contains the lower
                 triangular part of the matrix A, and the strictly upper
                 triangular part of A is not referenced.


       LDA (input)
                 LDA is INTEGER
                 The leading dimension of the array A.  LDA >= max(1,N).


       AP (output)
                 AP is DOUBLE PRECISION array, dimension (N*(N+1)/2
                 On exit, the upper or lower triangular matrix A, packed
                 columnwise in a linear array. The j-th column of A is stored
                 in the array AP as follows:
                 if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
                 if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.


       INFO (output)
                 INFO is INTEGER
                 = 0:  successful exit
                 < 0:  if INFO = -i, the i-th argument had an illegal value




                                  7 Nov 2015                        dtrttp(3P)