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