dbcsr_tas_multiply Subroutine

public recursive subroutine dbcsr_tas_multiply(transa, transb, transc, alpha, matrix_a, matrix_b, beta, matrix_c, optimize_dist, split_opt, filter_eps, flop, move_data_a, move_data_b, retain_sparsity, simple_split, result_index, unit_nr, log_verbose)

tall-and-skinny matrix-matrix multiplication. Undocumented dummy arguments are identical to arguments of dbcsr_multiply (see dbcsr_mm, dbcsr_multiply_generic).

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	transa
character(len=1),	intent(in)			::	transb
character(len=1),	intent(in)			::	transc
type(dbcsr_scalar_type),	intent(in)			::	alpha
type(dbcsr_tas_type),	intent(inout),		TARGET	::	matrix_a
type(dbcsr_tas_type),	intent(inout),		TARGET	::	matrix_b
type(dbcsr_scalar_type),	intent(in)			::	beta
type(dbcsr_tas_type),	intent(inout),		TARGET	::	matrix_c
logical,	intent(in),	optional		::	optimize_dist	Whether distribution should be optimized internally. In the current implementation this guarantees optimal parameters only for dense matrices.
type(dbcsr_tas_split_info),	intent(out),	optional		::	split_opt	optionally return split info containing optimal grid and split parameters. This can be used to choose optimal process grids for subsequent matrix multiplications with matrices of similar shape and sparsity.
real(kind=real_8),	intent(in),	optional		::	filter_eps
integer(kind=int_8),	intent(out),	optional		::	flop
logical,	intent(in),	optional		::	move_data_a	memory optimization: move data to matrix_c such that matrix_a is empty on return memory optimization: move data to matrix_c such that matrix_b is empty on return for internal use only
logical,	intent(in),	optional		::	move_data_b	memory optimization: move data to matrix_c such that matrix_a is empty on return memory optimization: move data to matrix_c such that matrix_b is empty on return for internal use only
logical,	intent(in),	optional		::	retain_sparsity	memory optimization: move data to matrix_c such that matrix_a is empty on return memory optimization: move data to matrix_c such that matrix_b is empty on return for internal use only
logical,	intent(in),	optional		::	simple_split	memory optimization: move data to matrix_c such that matrix_a is empty on return memory optimization: move data to matrix_c such that matrix_b is empty on return for internal use only
integer(kind=int_8),	intent(out),	optional,	DIMENSION(:, :), ALLOCATABLE	::	result_index
integer,	intent(in),	optional		::	unit_nr	unit number for logging output
logical,	intent(in),	optional		::	log_verbose	only for testing: verbose output