ssytrs2 (3p)

Name

ssytrs2 - metric matrix A using the factorization computed by SSYTRF and con- verted by SSYCONV

Synopsis

SUBROUTINE SSYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


CHARACTER*1 UPLO

INTEGER INFO, LDA, LDB, N, NRHS

INTEGER IPIV(*)

REAL A(LDA,*), B(LDB,*), WORK(*)


SUBROUTINE SSYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


CHARACTER*1 UPLO

INTEGER*8 INFO, LDA, LDB, N, NRHS

INTEGER*8 IPIV(*)

REAL A(LDA,*), B(LDB,*), WORK(*)


F95 INTERFACE
SUBROUTINE SYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


REAL, DIMENSION(:,:) :: A, B

INTEGER :: N, NRHS, LDA, LDB, INFO

CHARACTER(LEN=1) :: UPLO

INTEGER, DIMENSION(:) :: IPIV

REAL, DIMENSION(:) :: WORK


SUBROUTINE SYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


REAL, DIMENSION(:,:) :: A, B

INTEGER(8) :: N, NRHS, LDA, LDB, INFO

CHARACTER(LEN=1) :: UPLO

INTEGER(8), DIMENSION(:) :: IPIV

REAL, DIMENSION(:) :: WORK


C INTERFACE
#include <sunperf.h>

void ssytrs2 (char uplo, int n, int nrhs, float *a, int lda, int *ipiv,
float *b, int ldb, int *info);


void ssytrs2_64 (char uplo, long n, long nrhs, float *a, long lda, long
*ipiv, float *b, long ldb, long *info);

Description

Oracle Solaris Studio Performance Library                          ssytrs2(3P)



NAME
       ssytrs2  -  solve a system of linear equations A*X = B with a real sym-
       metric matrix A using the factorization computed  by  SSYTRF  and  con-
       verted by SSYCONV


SYNOPSIS
       SUBROUTINE SSYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


       CHARACTER*1 UPLO

       INTEGER INFO, LDA, LDB, N, NRHS

       INTEGER IPIV(*)

       REAL A(LDA,*), B(LDB,*), WORK(*)


       SUBROUTINE SSYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


       CHARACTER*1 UPLO

       INTEGER*8 INFO, LDA, LDB, N, NRHS

       INTEGER*8 IPIV(*)

       REAL A(LDA,*), B(LDB,*), WORK(*)


   F95 INTERFACE
       SUBROUTINE SYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


       REAL, DIMENSION(:,:) :: A, B

       INTEGER :: N, NRHS, LDA, LDB, INFO

       CHARACTER(LEN=1) :: UPLO

       INTEGER, DIMENSION(:) :: IPIV

       REAL, DIMENSION(:) :: WORK


       SUBROUTINE SYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)


       REAL, DIMENSION(:,:) :: A, B

       INTEGER(8) :: N, NRHS, LDA, LDB, INFO

       CHARACTER(LEN=1) :: UPLO

       INTEGER(8), DIMENSION(:) :: IPIV

       REAL, DIMENSION(:) :: WORK


   C INTERFACE
       #include <sunperf.h>

       void ssytrs2 (char uplo, int n, int nrhs, float *a, int lda, int *ipiv,
                 float *b, int ldb, int *info);


       void ssytrs2_64 (char uplo, long n, long nrhs, float *a, long lda, long
                 *ipiv, float *b, long ldb, long *info);


PURPOSE
       ssytrs2 solves a system of linear equations A*X = B with a real symmet-
       ric matrix A using the factorization A = U*D*U**T or A = L*D*L**T  com-
       puted by SSYTRF and converted by SSYCONV.


ARGUMENTS
       UPLO (input)
                 UPLO is CHARACTER*1
                 Specifies whether the details of the factorization are stored
                 as an upper or lower triangular matrix.
                 = 'U':  Upper triangular, form is A = U*D*U**T;
                 = 'L':  Lower triangular, form is A = L*D*L**T.


       N (input)
                 N is INTEGER
                 The order of the matrix A.  N >= 0.


       NRHS (input)
                 NRHS is INTEGER
                 The number of right hand sides, i.e., the number  of  columns
                 of the matrix B.  NRHS >= 0.


       A (input)
                 A is REAL array, dimension (LDA,N)
                 The  block  diagonal  matrix  D  and  the multipliers used to
                 obtain the factor U or L as computed by SSYTRF.


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


       IPIV (input)
                 IPIV is INTEGER array, dimension (N)
                 Details of the interchanges and the block structure of  D  as
                 determined by SSYTRF.


       B (input/output)
                 B is REAL array, dimension (LDB,NRHS)
                 On entry, the right hand side matrix B.
                 On exit, the solution matrix X.


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


       WORK (output)
                 WORK is REAL array, dimension (N)


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



                                  7 Nov 2015                       ssytrs2(3P)