void MAGMAF_ZGEQRF3_GPU(magma_int_t *m, magma_int_t *n,
devptr_t *dA, magma_int_t *ldda,
cuDoubleComplex *tau, devptr_t *dT,
magma_int_t *info)
{
magma_zgeqrf3_gpu(*m, *n,
DEVPTR(dA), *ldda,
tau, DEVPTR(dT), info);
}
extern "C" magma_int_t
magma_zgels3_gpu( char trans, magma_int_t m, magma_int_t n, magma_int_t nrhs,
magmaDoubleComplex *dA, magma_int_t ldda,
magmaDoubleComplex *dB, magma_int_t lddb,
magmaDoubleComplex *hwork, magma_int_t lwork,
magma_int_t *info)
{
/* -- MAGMA (version 1.4.1) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
December 2013
Purpose
=======
Solves the overdetermined, least squares problem
min || A*X - C ||
using the QR factorization A.
The underdetermined problem (m < n) is not currently handled.
Arguments
=========
TRANS (input) CHARACTER*1
= 'N': the linear system involves A.
Only trans='N' is currently handled.
M (input) INTEGER
The number of rows of the matrix A. M >= 0.
N (input) INTEGER
The number of columns of the matrix A. M >= N >= 0.
NRHS (input) INTEGER
The number of columns of the matrix C. NRHS >= 0.
A (input/output) COMPLEX_16 array, dimension (LDA,N)
On entry, the M-by-N matrix A.
On exit, A is overwritten by details of its QR
factorization as returned by ZGEQRF3.
LDDA (input) INTEGER
The leading dimension of the array A, LDDA >= M.
DB (input/output) COMPLEX_16 array on the GPU, dimension (LDDB,NRHS)
On entry, the M-by-NRHS matrix C.
On exit, the N-by-NRHS solution matrix X.
LDDB (input) INTEGER
The leading dimension of the array DB. LDDB >= M.
HWORK (workspace/output) COMPLEX_16 array, dimension MAX(1,LWORK).
On exit, if INFO = 0, HWORK(1) returns the optimal LWORK.
LWORK (input) INTEGER
The dimension of the array HWORK,
LWORK >= (M - N + NB)*(NRHS + NB) + NRHS*NB,
where NB is the blocksize given by magma_get_zgeqrf_nb( M ).
If LWORK = -1, then a workspace query is assumed; the routine
only calculates the optimal size of the HWORK array, returns
this value as the first entry of the HWORK array.
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
===================================================================== */
#define a_ref(a_1,a_2) (dA + (a_2)*(ldda) + (a_1))
magmaDoubleComplex *dT, *tau;
magma_int_t k;
magma_int_t nb = magma_get_zgeqrf_nb(m);
magma_int_t lwkopt = (m - n + nb)*(nrhs + nb) + nrhs*nb;
int lquery = (lwork == -1);
hwork[0] = MAGMA_Z_MAKE( (double)lwkopt, 0. );
*info = 0;
/* For now, N is the only case working */
if ( (trans != 'N') && (trans != 'n' ) )
*info = -1;
else if (m < 0)
*info = -2;
else if (n < 0 || m < n) /* LQ is not handle for now*/
*info = -3;
else if (nrhs < 0)
*info = -4;
else if (ldda < max(1,m))
*info = -6;
else if (lddb < max(1,m))
*info = -8;
else if (lwork < lwkopt && ! lquery)
*info = -10;
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
else if (lquery)
return *info;
k = min(m,n);
if (k == 0) {
hwork[0] = MAGMA_Z_ONE;
return *info;
}
/*
* Allocate temporary buffers
*/
int ldtwork = ( 2*k + ((n+31)/32)*32 )*nb;
if (nb < nrhs)
ldtwork = ( 2*k + ((n+31)/32)*32 )*nrhs;
if (MAGMA_SUCCESS != magma_zmalloc( &dT, ldtwork )) {
*info = MAGMA_ERR_DEVICE_ALLOC;
return *info;
}
magma_zmalloc_cpu( &tau, k );
if ( tau == NULL ) {
magma_free( dT );
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
magma_zgeqrf3_gpu( m, n, dA, ldda, tau, dT, info );
if ( *info == 0 ) {
magma_zgeqrs3_gpu( m, n, nrhs,
dA, ldda, tau, dT,
dB, lddb, hwork, lwork, info );
}
magma_free( dT );
magma_free_cpu(tau);
return *info;
}
/**
Purpose
-------
Solves the overdetermined, least squares problem
min || A*X - C ||
using the QR factorization A.
The underdetermined problem (m < n) is not currently handled.
Arguments
---------
@param[in]
trans magma_trans_t
- = MagmaNoTrans: the linear system involves A.
Only TRANS=MagmaNoTrans is currently handled.
@param[in]
m INTEGER
The number of rows of the matrix A. M >= 0.
@param[in]
n INTEGER
The number of columns of the matrix A. M >= N >= 0.
@param[in]
nrhs INTEGER
The number of columns of the matrix C. NRHS >= 0.
@param[in,out]
dA COMPLEX_16 array, dimension (LDA,N)
On entry, the M-by-N matrix A.
On exit, A is overwritten by details of its QR
factorization as returned by ZGEQRF3.
@param[in]
ldda INTEGER
The leading dimension of the array A, LDDA >= M.
@param[in,out]
dB COMPLEX_16 array on the GPU, dimension (LDDB,NRHS)
On entry, the M-by-NRHS matrix C.
On exit, the N-by-NRHS solution matrix X.
@param[in]
lddb INTEGER
The leading dimension of the array dB. LDDB >= M.
@param[out]
hwork (workspace) COMPLEX_16 array, dimension MAX(1,LWORK).
On exit, if INFO = 0, HWORK[0] returns the optimal LWORK.
@param[in]
lwork INTEGER
The dimension of the array HWORK,
LWORK >= (M - N + NB)*(NRHS + NB) + NRHS*NB,
where NB is the blocksize given by magma_get_zgeqrf_nb( M ).
\n
If LWORK = -1, then a workspace query is assumed; the routine
only calculates the optimal size of the HWORK array, returns
this value as the first entry of the HWORK array.
@param[out]
info INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
@ingroup magma_zgels_driver
********************************************************************/
extern "C" magma_int_t
magma_zgels3_gpu( magma_trans_t trans, magma_int_t m, magma_int_t n, magma_int_t nrhs,
magmaDoubleComplex *dA, magma_int_t ldda,
magmaDoubleComplex *dB, magma_int_t lddb,
magmaDoubleComplex *hwork, magma_int_t lwork,
magma_int_t *info)
{
magmaDoubleComplex *dT, *tau;
magma_int_t k;
magma_int_t nb = magma_get_zgeqrf_nb(m);
magma_int_t lwkopt = (m - n + nb)*(nrhs + nb) + nrhs*nb;
int lquery = (lwork == -1);
hwork[0] = MAGMA_Z_MAKE( (double)lwkopt, 0. );
*info = 0;
/* For now, N is the only case working */
if ( trans != MagmaNoTrans )
*info = -1;
else if (m < 0)
*info = -2;
else if (n < 0 || m < n) /* LQ is not handle for now*/
*info = -3;
else if (nrhs < 0)
*info = -4;
else if (ldda < max(1,m))
*info = -6;
else if (lddb < max(1,m))
*info = -8;
else if (lwork < lwkopt && ! lquery)
*info = -10;
if (*info != 0) {
magma_xerbla( __func__, -(*info) );
return *info;
}
else if (lquery)
return *info;
k = min(m,n);
if (k == 0) {
hwork[0] = MAGMA_Z_ONE;
return *info;
}
/*
* Allocate temporary buffers
*/
int ldtwork = ( 2*k + ((n+31)/32)*32 )*nb;
if (nb < nrhs)
ldtwork = ( 2*k + ((n+31)/32)*32 )*nrhs;
if (MAGMA_SUCCESS != magma_zmalloc( &dT, ldtwork )) {
*info = MAGMA_ERR_DEVICE_ALLOC;
return *info;
}
magma_zmalloc_cpu( &tau, k );
if ( tau == NULL ) {
magma_free( dT );
*info = MAGMA_ERR_HOST_ALLOC;
return *info;
}
magma_zgeqrf3_gpu( m, n, dA, ldda, tau, dT, info );
if ( *info == 0 ) {
magma_zgeqrs3_gpu( m, n, nrhs,
dA, ldda, tau, dT,
dB, lddb, hwork, lwork, info );
}
magma_free( dT );
magma_free_cpu(tau);
return *info;
}
