lapack_int LAPACKE_dlarft( int matrix_order, char direct, char storev,
lapack_int n, lapack_int k, const double* v,
lapack_int ldv, const double* tau, double* t,
lapack_int ldt )
{
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dlarft", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
lapack_int ncols_v = LAPACKE_lsame( storev, 'c' ) ? k :
( LAPACKE_lsame( storev, 'r' ) ? n : 1);
lapack_int nrows_v = LAPACKE_lsame( storev, 'c' ) ? n :
( LAPACKE_lsame( storev, 'r' ) ? k : 1);
if( LAPACKE_d_nancheck( k, tau, 1 ) ) {
return -8;
}
if( LAPACKE_dge_nancheck( matrix_order, nrows_v, ncols_v, v, ldv ) ) {
return -6;
}
#endif
return LAPACKE_dlarft_work( matrix_order, direct, storev, n, k, v, ldv, tau,
t, ldt );
}
int CORE_dgeqrt(int M, int N, int IB,
double *A, int LDA,
double *T, int LDT,
double *TAU,
double *WORK)
{
int i, k, sb;
int iinfo = 0;
/* Check input arguments */
if (M < 0) {
coreblas_error(1, "Illegal value of M");
return -1;
}
if (N < 0) {
coreblas_error(2, "Illegal value of N");
return -2;
}
if ((IB < 0) || ( (IB == 0) && ((M > 0) && (N > 0)) )) {
coreblas_error(3, "Illegal value of IB");
return -3;
}
if ((LDA < max(1,M)) && (M > 0)) {
coreblas_error(5, "Illegal value of LDA");
return -5;
}
if ((LDT < max(1,IB)) && (IB > 0)) {
coreblas_error(7, "Illegal value of LDT");
return -7;
}
/* Quick return */
if ((M == 0) || (N == 0) || (IB == 0))
return PLASMA_SUCCESS;
k = min(M, N);
for(i = 0; i < k; i += IB) {
sb = min(IB, k-i);
iinfo = LAPACKE_dgeqr2_work(LAPACK_COL_MAJOR, M-i, sb,
&A[LDA*i+i], LDA, &TAU[i], WORK);
LAPACKE_dlarft_work(LAPACK_COL_MAJOR,
lapack_const(PlasmaForward),
lapack_const(PlasmaColumnwise),
M-i, sb,
&A[LDA*i+i], LDA, &TAU[i],
&T[LDT*i], LDT);
if (N > i+sb) {
LAPACKE_dlarfb_work(
LAPACK_COL_MAJOR,
lapack_const(PlasmaLeft),
lapack_const(PlasmaTrans),
lapack_const(PlasmaForward),
lapack_const(PlasmaColumnwise),
M-i, N-i-sb, sb,
&A[LDA*i+i], LDA,
&T[LDT*i], LDT,
&A[LDA*(i+sb)+i], LDA,
WORK, N-i-sb);
}
}
return PLASMA_SUCCESS;
}
