dorg2l - generate an m by n real matrix Q with orthonormal columns,
SUBROUTINE DORG2L(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER M, N, K, LDA, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*) SUBROUTINE DORG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER*8 M, N, K, LDA, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*) F95 INTERFACE SUBROUTINE ORG2L(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER :: M, N, K, LDA, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A SUBROUTINE ORG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER(8) :: M, N, K, LDA, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void dorg2l(int m, int n, int k, double *a, int lda, double *tau, int *info); void dorg2l_64(long m, long n, long k, double *a, long lda, double *tau, long *info);
Oracle Solaris Studio Performance Library dorg2l(3P) NAME dorg2l - generate an m by n real matrix Q with orthonormal columns, SYNOPSIS SUBROUTINE DORG2L(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER M, N, K, LDA, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*) SUBROUTINE DORG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER*8 M, N, K, LDA, INFO DOUBLE PRECISION A(LDA,*), TAU(*), WORK(*) F95 INTERFACE SUBROUTINE ORG2L(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER :: M, N, K, LDA, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A SUBROUTINE ORG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) INTEGER(8) :: M, N, K, LDA, INFO REAL(8), DIMENSION(:) :: TAU, WORK REAL(8), DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void dorg2l(int m, int n, int k, double *a, int lda, double *tau, int *info); void dorg2l_64(long m, long n, long k, double *a, long lda, double *tau, long *info); PURPOSE dorg2l L generates an m by n real matrix Q with orthonormal columns, which is defined as the last n columns of a product of k elementary reflectors of order m Q = H(k) . . . H(2) H(1) as returned by DGEQLF. ARGUMENTS M (input) The number of rows of the matrix Q. M >= 0. N (input) The number of columns of the matrix Q. M >= N >= 0. K (input) The number of elementary reflectors whose product defines the matrix Q. N >= K >= 0. A (input/output) On entry, the (n-k+i)-th column must contain the vector which defines the elementary reflector H(i), for i = 1,2,...,k, as returned by DGEQLF in the last k columns of its array argu- ment A. On exit, the m by n matrix Q. LDA (input) The first dimension of the array A. LDA >= max(1,M). TAU (input) TAU(i) must contain the scalar factor of the elementary reflector H(i), as returned by DGEQLF. WORK (workspace) dimension(N) INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument has an illegal value 7 Nov 2015 dorg2l(3P)