zung2l - ization determined by cgeqlf (unblocked algorithm)
SUBROUTINE ZUNG2L(M, N, K, A, LDA, TAU, WORK, INFO) DOUBLE COMPLEX A(LDA,*), TAU(*), WORK(*) INTEGER M, N, K, LDA, INFO SUBROUTINE ZUNG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) DOUBLE COMPLEX A(LDA,*), TAU(*), WORK(*) INTEGER*8 M, N, K, LDA, INFO F95 INTERFACE SUBROUTINE UNG2L(M, N, K, A, LDA, TAU, WORK, INFO) COMPLEX(8), DIMENSION(:) :: TAU, WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: M, N, K, LDA, INFO SUBROUTINE UNG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) COMPLEX(8), DIMENSION(:) :: TAU, WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: M, N, K, LDA, INFO C INTERFACE #include <sunperf.h> void zung2l(int m, int n, int k, doublecomplex *a, int lda, doublecom- plex *tau, int *info); void zung2l_64(long m, long n, long k, doublecomplex *a, long lda, dou- blecomplex *tau, long *info);
Oracle Solaris Studio Performance Library zung2l(3P) NAME zung2l - generate all or part of the unitary matrix Q from a QL factor- ization determined by cgeqlf (unblocked algorithm) SYNOPSIS SUBROUTINE ZUNG2L(M, N, K, A, LDA, TAU, WORK, INFO) DOUBLE COMPLEX A(LDA,*), TAU(*), WORK(*) INTEGER M, N, K, LDA, INFO SUBROUTINE ZUNG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) DOUBLE COMPLEX A(LDA,*), TAU(*), WORK(*) INTEGER*8 M, N, K, LDA, INFO F95 INTERFACE SUBROUTINE UNG2L(M, N, K, A, LDA, TAU, WORK, INFO) COMPLEX(8), DIMENSION(:) :: TAU, WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: M, N, K, LDA, INFO SUBROUTINE UNG2L_64(M, N, K, A, LDA, TAU, WORK, INFO) COMPLEX(8), DIMENSION(:) :: TAU, WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: M, N, K, LDA, INFO C INTERFACE #include <sunperf.h> void zung2l(int m, int n, int k, doublecomplex *a, int lda, doublecom- plex *tau, int *info); void zung2l_64(long m, long n, long k, doublecomplex *a, long lda, dou- blecomplex *tau, long *info); PURPOSE zung2l generates an M-by-N complex 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 ZGEQLF. 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 ZGEQLF 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 ZGEQLF. WORK (workspace) dimension(N) INFO (output) = 0: successful exit; < 0: if INFO = -i, the i-th argument has an illegal value. 7 Nov 2015 zung2l(3P)