ssytri_rook - compute the inverse of a real symmetric indefinite matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by SSYTRF_ROOK
SUBROUTINE SSYTRI_ROOK(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER*1 UPLO INTEGER N, LDA, INFO INTEGER IPIV(*) REAL A(LDA,*), WORK(*) SUBROUTINE SSYTRI_ROOK_64(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER*1 UPLO INTEGER*8 N, LDA, INFO INTEGER*8 IPIV(*) REAL A(LDA,*), WORK(*) F95 INTERFACE SUBROUTINE SYTRI_ROOK(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, LDA, INFO INTEGER, DIMENSION(:) :: IPIV REAL, DIMENSION(:) :: WORK REAL, DIMENSION(:,:) :: A SUBROUTINE SYTRI_ROOK_64(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, LDA, INFO INTEGER(8), DIMENSION(:) :: IPIV REAL, DIMENSION(:) :: WORK REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void ssytri_rook(char uplo, int n, float *a, int lda, int *ipiv, int *info); void ssytri_rook_64(char uplo, long n, float *a, long lda, long *ipiv, long *info);
Oracle Solaris Studio Performance Library ssytri_rook(3P) NAME ssytri_rook - compute the inverse of a real symmetric indefinite matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by SSYTRF_ROOK SYNOPSIS SUBROUTINE SSYTRI_ROOK(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER*1 UPLO INTEGER N, LDA, INFO INTEGER IPIV(*) REAL A(LDA,*), WORK(*) SUBROUTINE SSYTRI_ROOK_64(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER*1 UPLO INTEGER*8 N, LDA, INFO INTEGER*8 IPIV(*) REAL A(LDA,*), WORK(*) F95 INTERFACE SUBROUTINE SYTRI_ROOK(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, LDA, INFO INTEGER, DIMENSION(:) :: IPIV REAL, DIMENSION(:) :: WORK REAL, DIMENSION(:,:) :: A SUBROUTINE SYTRI_ROOK_64(UPLO, N, A, LDA, IPIV, WORK, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, LDA, INFO INTEGER(8), DIMENSION(:) :: IPIV REAL, DIMENSION(:) :: WORK REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void ssytri_rook(char uplo, int n, float *a, int lda, int *ipiv, int *info); void ssytri_rook_64(char uplo, long n, float *a, long lda, long *ipiv, long *info); PURPOSE ssytri_rook computes the inverse of a real symmetric indefinite matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by SSYTRF_ROOK. ARGUMENTS UPLO (input) Specifies whether the details of the factorization are stored as an upper or lower triangular matrix. = 'U': Upper trian- gular, form is A = U*D*U**T; = 'L': Lower triangular, form is A = L*D*L**T. N (input) The order of the matrix A. N >= 0. A (input/output) On entry, the block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by SSYTRF_ROOK. On exit, if INFO = 0, the (symmetric) inverse of the original matrix. If UPLO = 'U', the upper triangular part of the inverse is formed and the part of A below the diagonal is not referenced; if UPLO = 'L' the lower triangular part of the inverse is formed and the part of A above the diagonal is not referenced. LDA (input) The leading dimension of the array A. LDA >= max(1,N). IPIV (input) Details of the interchanges and the block structure of D as determined by SSYTRF_ROOK. WORK (workspace) dimension(N) INFO (output) = 0: successful exit; < 0: if INFO = -i, the i-th argument had an illegal value; > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its inverse could not be computed. 7 Nov 2015 ssytri_rook(3P)