dlaf_pchegvd – DLA-Future-Fortran

public subroutine dlaf_pchegvd(uplo, n, a, ia, ja, desca, b, ib, jb, descb, w, z, iz, jz, descz, info)

Generalized eigensolver for a distributed single-precision Hermitian eigenproblem of the form $\mathbf{A}\mathbf{x} = \lambda\mathbf{B}\mathbf{x}.$

NOTE: The input matrix and the matrix of eigenvectors are assumed to be distributed in host memory. Moving to and from GPU memory is handled internally.

NOTE: The vector of eigenvalues is assumed to be local (non-distributed) and in host memory Moving to and from GPU memory is handled internally.

NOTE: The pika runtime is resumed when this function is called and suspended when the call terminates.

Arguments

Type	Intent	Attributes		Name
character(len=1),	intent(in)		::	uplo	Indicates whether the upper (`"U"`) or lower (`"L"`) triangular part of the global sub-matrix $\mathbf{A}$ is referenced. NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in)		::	n	Order of the matrix sub-matrix $\mathbf{A}$ used in the computation.
complex(kind=sp),	intent(inout),	dimension(:, :), target	::	a	Local part of the global matrix $\mathbf{A}$ .
integer,	intent(in)		::	ia	Row index of the global matrix identifying the first row of the sub-matrix $\mathbf{A}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in)		::	ja	Column index of the global matrix identifying the first column of the sub-matrix $\mathbf{A}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in),	dimension(9)	::	desca	ScaLAPACK descriptor of the global matrix $\mathbf{A}$ .
complex(kind=sp),	intent(inout),	dimension(:, :), target	::	b	Local part of the global matrix $\mathbf{B}$ .
integer,	intent(in)		::	ib	Row index of the global matrix identifying the first row of the sub-matrix $\mathbf{B}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in)		::	jb	Column index of the global matrix identifying the first column of the sub-matrix $\mathbf{B}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in),	dimension(9)	::	descb	ScaLAPACK descriptor of the global matrix $\mathbf{B}$ .
real(kind=sp),	intent(out),	dimension(:), target	::	w	Local (non-distributed) vector of eigenvalues.
complex(kind=sp),	intent(inout),	dimension(:, :), target	::	z	Local part of the global matrix $\mathbf{Z}$ .
integer,	intent(in)		::	iz	Row index in the global matrix identifying the first row of the sub-matrix $\mathbf{Z}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in)		::	jz	Column index in the global matrix identifying the first column of the sub-matrix $\mathbf{Z}$ . NOTE: Check restrictions on this parameter on the DLA-Future documentation, for the DLA-Future version you are using.
integer,	intent(in),	dimension(9)	::	descz	ScaLAPACK descriptor of the global matrix $\mathbf{Z}$ .
integer,	intent(out),	target	::	info	`0` if the function completed successfully.

dlaf_pchegvd Subroutine

Contents

public subroutine dlaf_pchegvd(uplo, n, a, ia, ja, desca, b, ib, jb, descb, w, z, iz, jz, descz, info)

Arguments