void bli_obj_scalar_init_detached( num_t dt,
obj_t* beta )
{
void* p;
// Initialize beta without a buffer and then attach its internal buffer.
bli_obj_create_without_buffer( dt, 1, 1, beta );
// Query the address of the object's internal scalar buffer.
p = bli_obj_internal_scalar_buffer( *beta );
// Update the object.
bli_obj_set_buffer( p, *beta );
bli_obj_set_strides( 1, 1, *beta );
bli_obj_set_imag_stride( 1, *beta );
}
void bli_obj_attach_buffer( void* p,
inc_t rs,
inc_t cs,
inc_t is,
obj_t* obj )
{
// Check that the strides and lengths are compatible. Note that the
// user *must* specify valid row and column strides when attaching an
// external buffer.
if ( bli_error_checking_is_enabled() )
bli_obj_attach_buffer_check( p, rs, cs, is, obj );
// Update the object.
bli_obj_set_buffer( p, *obj );
bli_obj_set_strides( rs, cs, *obj );
bli_obj_set_imag_stride( is, *obj );
}
siz_t bli_packv_init_pack
(
pack_t schema,
bszid_t bmult_id,
obj_t* a,
obj_t* p,
cntx_t* cntx
)
{
num_t dt = bli_obj_dt( a );
dim_t dim_a = bli_obj_vector_dim( a );
dim_t bmult = bli_cntx_get_blksz_def_dt( dt, bmult_id, cntx );
membrk_t* membrk = bli_cntx_membrk( cntx );
#if 0
mem_t* mem_p;
#endif
dim_t m_p_pad;
siz_t size_p;
inc_t rs_p, cs_p;
void* buf;
// We begin by copying the basic fields of c.
bli_obj_alias_to( a, p );
// Update the dimensions.
bli_obj_set_dims( dim_a, 1, p );
// Reset the view offsets to (0,0).
bli_obj_set_offs( 0, 0, p );
// Set the pack schema in the p object to the value in the control tree
// node.
bli_obj_set_pack_schema( schema, p );
// Compute the dimensions padded by the dimension multiples.
m_p_pad = bli_align_dim_to_mult( bli_obj_vector_dim( p ), bmult );
// Compute the size of the packed buffer.
size_p = m_p_pad * 1 * bli_obj_elem_size( p );
#if 0
// Extract the address of the mem_t object within p that will track
// properties of the packed buffer.
mem_p = bli_obj_pack_mem( *p );
if ( bli_mem_is_unalloc( mem_p ) )
{
// If the mem_t object of p has not yet been allocated, then acquire
// a memory block suitable for a vector.
bli_membrk_acquire_v( membrk,
size_p,
mem_p );
}
else
{
// If the mem_t object has already been allocated, then release and
// re-acquire the memory so there is sufficient space.
if ( bli_mem_size( mem_p ) < size_p )
{
bli_membrk_release( mem_p );
bli_membrk_acquire_v( membrk,
size_p,
mem_p );
}
}
// Grab the buffer address from the mem_t object and copy it to the
// main object buffer field. (Sometimes this buffer address will be
// copied when the value is already up-to-date, because it persists
// in the main object buffer field across loop iterations.)
buf = bli_mem_buffer( mem_p );
bli_obj_set_buffer( buf, p );
#endif
// Save the padded (packed) dimensions into the packed object.
bli_obj_set_padded_dims( m_p_pad, 1, p );
// Set the row and column strides of p based on the pack schema.
if ( schema == BLIS_PACKED_VECTOR )
{
// Set the strides to reflect a column-stored vector. Note that the
// column stride may never be used, and is only useful to determine
// how much space beyond the vector would need to be zero-padded, if
// zero-padding was needed.
rs_p = 1;
cs_p = bli_obj_padded_length( p );
bli_obj_set_strides( rs_p, cs_p, p );
}
return size_p;
}
void bli_obj_alloc_buffer( inc_t rs,
inc_t cs,
inc_t is,
obj_t* obj )
{
dim_t n_elem = 0;
dim_t m, n;
siz_t elem_size;
siz_t buffer_size;
void* p;
// Query the dimensions of the object we are allocating.
m = bli_obj_length( *obj );
n = bli_obj_width( *obj );
// Query the size of one element.
elem_size = bli_obj_elem_size( *obj );
// Adjust the strides, if needed, before doing anything else
// (particularly, before doing any error checking).
bli_adjust_strides( m, n, elem_size, &rs, &cs, &is );
if ( bli_error_checking_is_enabled() )
bli_obj_alloc_buffer_check( rs, cs, is, obj );
// Determine how much object to allocate.
if ( m == 0 || n == 0 )
{
// For empty objects, set n_elem to zero. Row and column strides
// should remain unchanged (because alignment is not needed).
n_elem = 0;
}
else
{
// The number of elements to allocate is given by the distance from
// the element with the lowest address (usually {0, 0}) to the element
// with the highest address (usually {m-1, n-1}), plus one for the
// highest element itself.
n_elem = (m-1) * bli_abs( rs ) + (n-1) * bli_abs( cs ) + 1;
}
// Handle the special case where imaginary stride is larger than
// normal.
if ( bli_obj_is_complex( *obj ) )
{
// Notice that adding is/2 works regardless of whether the
// imaginary stride is unit, something between unit and
// 2*n_elem, or something bigger than 2*n_elem.
n_elem = bli_abs( is ) / 2 + n_elem;
}
// Compute the size of the total buffer to be allocated, which includes
// padding if the leading dimension was increased for alignment purposes.
buffer_size = ( siz_t )n_elem * elem_size;
// Allocate the buffer.
p = bli_malloc_user( buffer_size );
// Set individual fields.
bli_obj_set_buffer( p, *obj );
bli_obj_set_strides( rs, cs, *obj );
bli_obj_set_imag_stride( is, *obj );
}
