SUBROUTINE DORGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO) CHARACTER * 1 VECT INTEGER M, N, K, LDA, LWORK, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*) SUBROUTINE DORGBR_64( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO) CHARACTER * 1 VECT INTEGER*8 M, N, K, LDA, LWORK, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*)
SUBROUTINE ORGBR( VECT, M, [N], K, A, [LDA], TAU, [WORK], [LWORK], * [INFO]) CHARACTER(LEN=1) :: VECT INTEGER :: M, N, K, LDA, LWORK, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A SUBROUTINE ORGBR_64( VECT, M, [N], K, A, [LDA], TAU, [WORK], [LWORK], * [INFO]) CHARACTER(LEN=1) :: VECT INTEGER(8) :: M, N, K, LDA, LWORK, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A
void dorgbr(char vect, int m, int n, int k, double *a, int lda, double *tau, int *info);
void dorgbr_64(char vect, long m, long n, long k, double *a, long lda, double *tau, long *info);
If VECT = 'Q', A is assumed to have been an M-by-K matrix, and Q is of order M:
if m >= k, Q = H(1) H(2) . . . H(k) and SORGBR returns the first n columns of Q, where m >= n >= k;
if m < k, Q = H(1) H(2) . . . H(m-1) and SORGBR returns Q as an M-by-M matrix.
If VECT = 'P', A is assumed to have been a K-by-N matrix, and P**T is of order N:
if k < n, P**T = G(k) . . . G(2) G(1) and SORGBR returns the first m rows of P**T, where n >= m >= k;
if k >= n, P**T = G(n-1) . . . G(2) G(1) and SORGBR returns P**T as an N-by-N matrix.
If LWORK = -1, then a workspace query is assumed; the routine only calculates the optimal size of the WORK array, returns this value as the first entry of the WORK array, and no error message related to LWORK is issued by XERBLA.