Scatter-Gather Types

These types store information about about scatter-gather routing patterns

struct t_scatter_gather_pattern

Struct containing information of a <sg_pattern> tag. When instantiated in the device using sg_locations, a scatter-gather pattern defined by this struct gathers connections according to gather_pattern, moves through the device using one of the sg_links and fans out or scatters the connections according to scatter_pattern.

struct t_sg_link

Struct containing information of a <sg_link> tag. This tag describes how and where the scatter (fanout) happens relative to the gather (fanin).

Public Members

std::string name

Name of the sg_link.

std::optional<int> mux_index

If set, index into the architecture switch list (t_arch_switch_inf) for the gather mux (resolved from the mux attribute on <sg_link>). Unset when mux is empty.

std::string seg_type

Segment/wire used to move through the device to the scatter location.

int x_offset

X offset of where the scatter happens relative to the gather. If set, the Y and Z offsets must be zero.

int y_offset

Y offset of where the scatter happens relative to the gather. If set, the X and Z offsets must be zero.

int z_offset

Z offset of where the scatter happens relative to the gather. If set, the X and Y offsets must be zero.

struct t_sg_location

Struct containing information of an <sg_location> tag. An <sg_location> tag instantiates the scatter-gather pattern in some switchblock locations within the device. region is only valid if type == e_sb_location::E_XY_SPECIFIED.

Public Members

e_sb_location type

Type of locations that the pattern is instantiated at.

t_specified_loc region

Specification of the region where gather is applied.

std::string num

Formula (variable W = channel width) for number of scatter-gather pattern instantiations per location.

std::string sg_link_name

Name of scatter-gather link to be used.