zptts2 - solve a tridiagonal system of the form A * X = B using the factorization A = U'*D*U or A = L*D*L' computed by ZPTTRF
SUBROUTINE ZPTTS2(IUPLO, N, NRHS, D, E, B, LDB) DOUBLE COMPLEX E(*), B(LDB,*) INTEGER IUPLO, N, NRHS, LDB DOUBLE PRECISION D(*) SUBROUTINE ZPTTS2_64(IUPLO, N, NRHS, D, E, B, LDB) DOUBLE COMPLEX E(*), B(LDB,*) INTEGER*8 IUPLO, N, NRHS, LDB DOUBLE PRECISION D(*) F95 INTERFACE SUBROUTINE ZPTTS2(IUPLO, N, NRHS, D, E, B, LDB) COMPLEX(8), DIMENSION(:) :: E COMPLEX(8), DIMENSION(:,:) :: B INTEGER :: IUPLO, N, NRHS, LDB REAL(8), DIMENSION(:) :: D SUBROUTINE ZPTTS2_64(IUPLO, N, NRHS, D, E, B, LDB) COMPLEX(8), DIMENSION(:) :: E COMPLEX(8), DIMENSION(:,:) :: B INTEGER(8) :: IUPLO, N, NRHS, LDB REAL(8), DIMENSION(:) :: D C INTERFACE #include <sunperf.h> void zptts2(int iuplo, int n, int nrhs, double *d, doublecomplex *e, doublecomplex *b, int ldb); void zptts2_64(long iuplo, long n, long nrhs, double *d, doublecomplex *e, doublecomplex *b, long ldb);
Oracle Solaris Studio Performance Library zptts2(3P) NAME zptts2 - solve a tridiagonal system of the form A * X = B using the factorization A = U'*D*U or A = L*D*L' computed by ZPTTRF SYNOPSIS SUBROUTINE ZPTTS2(IUPLO, N, NRHS, D, E, B, LDB) DOUBLE COMPLEX E(*), B(LDB,*) INTEGER IUPLO, N, NRHS, LDB DOUBLE PRECISION D(*) SUBROUTINE ZPTTS2_64(IUPLO, N, NRHS, D, E, B, LDB) DOUBLE COMPLEX E(*), B(LDB,*) INTEGER*8 IUPLO, N, NRHS, LDB DOUBLE PRECISION D(*) F95 INTERFACE SUBROUTINE ZPTTS2(IUPLO, N, NRHS, D, E, B, LDB) COMPLEX(8), DIMENSION(:) :: E COMPLEX(8), DIMENSION(:,:) :: B INTEGER :: IUPLO, N, NRHS, LDB REAL(8), DIMENSION(:) :: D SUBROUTINE ZPTTS2_64(IUPLO, N, NRHS, D, E, B, LDB) COMPLEX(8), DIMENSION(:) :: E COMPLEX(8), DIMENSION(:,:) :: B INTEGER(8) :: IUPLO, N, NRHS, LDB REAL(8), DIMENSION(:) :: D C INTERFACE #include <sunperf.h> void zptts2(int iuplo, int n, int nrhs, double *d, doublecomplex *e, doublecomplex *b, int ldb); void zptts2_64(long iuplo, long n, long nrhs, double *d, doublecomplex *e, doublecomplex *b, long ldb); PURPOSE zptts2 solves a tridiagonal system of the form A * X = B using the factorization A = U'*D*U or A = L*D*L' computed by ZPTTRF. D is a diagonal matrix specified in the vector D, U (or L) is a unit bidiagonal matrix whose superdiagonal (subdiagonal) is speci- fied in the vector E, and X and B are N by NRHS matrices. ARGUMENTS IUPLO (input) Specifies the form of the factorization and whether the vec- tor E is the superdiagonal of the upper bidiagonal factor U or the subdiagonal of the lower bidiagonal factor L. = 1: A = U'*D*U, E is the superdiagonal of U = 0: A = L*D*L', E is the subdiagonal of L N (input) The order of the tridiagonal matrix A. N >= 0. NRHS (input) The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. D (input) The n diagonal elements of the diagonal matrix D from the factorization A = U'*D*U or A = L*D*L'. E (input) If IUPLO = 1, the (n-1) superdiagonal elements of the unit bidiagonal factor U from the factorization A = U'*D*U. If IUPLO = 0, the (n-1) subdiagonal elements of the unit bidiag- onal factor L from the factorization A = L*D*L'. B (input/output) On entry, the right hand side vectors B for the system of linear equations. On exit, the solution vectors, X. LDB (input) The leading dimension of the array B. LDB >= max(1,N). 7 Nov 2015 zptts2(3P)