ssptrs - ric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF
SUBROUTINE SSPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER*1 UPLO INTEGER N, NRHS, LDB, INFO INTEGER IPIVOT(*) REAL AP(*), B(LDB,*) SUBROUTINE SSPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER*1 UPLO INTEGER*8 N, NRHS, LDB, INFO INTEGER*8 IPIVOT(*) REAL AP(*), B(LDB,*) F95 INTERFACE SUBROUTINE SPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, NRHS, LDB, INFO INTEGER, DIMENSION(:) :: IPIVOT REAL, DIMENSION(:) :: AP REAL, DIMENSION(:,:) :: B SUBROUTINE SPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, NRHS, LDB, INFO INTEGER(8), DIMENSION(:) :: IPIVOT REAL, DIMENSION(:) :: AP REAL, DIMENSION(:,:) :: B C INTERFACE #include <sunperf.h> void ssptrs(char uplo, int n, int nrhs, float *ap, int *ipivot, float *b, int ldb, int *info); void ssptrs_64(char uplo, long n, long nrhs, float *ap, long *ipivot, float *b, long ldb, long *info);
Oracle Solaris Studio Performance Library ssptrs(3P) NAME ssptrs - solve a system of linear equations A*X = B with a real symmet- ric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF SYNOPSIS SUBROUTINE SSPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER*1 UPLO INTEGER N, NRHS, LDB, INFO INTEGER IPIVOT(*) REAL AP(*), B(LDB,*) SUBROUTINE SSPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER*1 UPLO INTEGER*8 N, NRHS, LDB, INFO INTEGER*8 IPIVOT(*) REAL AP(*), B(LDB,*) F95 INTERFACE SUBROUTINE SPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, NRHS, LDB, INFO INTEGER, DIMENSION(:) :: IPIVOT REAL, DIMENSION(:) :: AP REAL, DIMENSION(:,:) :: B SUBROUTINE SPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, NRHS, LDB, INFO INTEGER(8), DIMENSION(:) :: IPIVOT REAL, DIMENSION(:) :: AP REAL, DIMENSION(:,:) :: B C INTERFACE #include <sunperf.h> void ssptrs(char uplo, int n, int nrhs, float *ap, int *ipivot, float *b, int ldb, int *info); void ssptrs_64(char uplo, long n, long nrhs, float *ap, long *ipivot, float *b, long ldb, long *info); PURPOSE ssptrs solves a system of linear equations A*X = B with a real symmet- ric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF. 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. NRHS (input) The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. AP (input) Real array, dimension (N*(N+1)/2) The block diagonal matrix D and the multipliers used to obtain the factor U or L as com- puted by SSPTRF, stored as a packed triangular matrix. IPIVOT (input) Integer array, dimension (N) Details of the interchanges and the block structure of D as determined by SSPTRF. B (input/output) Real array, dimension (LDB, NRHS) On entry, the right hand side matrix B. On exit, the solution matrix X. LDB (input) The leading dimension of the array B. LDB >= max(1,N). INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 ssptrs(3P)