remaster

remaster_via

remaster_via 
[ -window_id i_windowID ] 
[ -all | -region {f_xlo f_ylo f_xhi f_yhi} | -set d_setObj ] 
[ -do_via_layers {s_layerName …} ] 
[ -lock_layers {s_layerName …} ] 
[ -exclude_set d_setObj ] 
[ -exclude_net {s_netName …} ] 
[ -exclude_type {[power] [ground] [clock]} ] 
[ -exclude_via_pin [ true | false ] ] 
[ -output_pins_only [ true | false ] ] 
[ -insertion_mode {{on_wire | off_wire | on_wire_push | off_wire_push | all}…} ] 
[ -annotate all | unfixed | skipped | remastered | none ] 
[ -annotation_limit i_count ] 
[ -allow_num_cut_downsizing [ true | false ] ] 
[ -check_antenna [ true | false ] ] 
[ -clear_annotations ]
[ -critic [ true | false ] ] 
[ -double_cut_only [ true | false ] | -single_cut_only [ true | false ]
[ -ignore_active_route_status [ true | false ] ] 
[ -optimize_multi_cut_via_enclosure i_numCut ] 
[ -push_limit {1 | 2 | 3 | 4 | 5} ] 
[ -silent [ true | false ] ] 
[ -threads i_threads ] 
[ -use_grid {mfg | route} ] 
[ -valid_routing_vias {s_viaName…} 
  [ -override_valid_routing_vias [ true | false ] ] ] 
[ -via_order {s_viaName…} [ -via_order_only [ true | false ] ] ]
[ -lock_pin_metal [ true | false ] ]

Description

Remasters vias in the target area of the cellview. You can optionally add annotations for remastered, skipped, or unfixed vias to the design on the annotation:viaOpt purpose of the via layer. On completion of this command, the Redundant Via Insertion Summary is output to the Transcript area and remastered vias are placed on the via:redundant purpose.

By default, all available vias given by the validRoutingVias constraint (including metal1/poly vias) are considered. To customize the list of considered vias, use -valid_routing_vias. To specify a list of vias to consider first, use -via_order.

If the map_redundant_via command has been issued prior to using this command, only the via mappings given by the map_redundant_via command (typically sourced in a Tcl mapping file script that you must create) will be used to remaster vias. In the preferred method, which does not use a mapping file, Space-based Router and Chip Optimizer will attempt to remaster using vias given by the validRoutingVias constraint, starting with double cut vias and then larger enclosure single cut vias. If you translated your design from LEF, validRoutingVias should automatically be set and include all of the vias in the library. If you have customized your design and added additional via cellviews, you must ensure that validRoutingVias includes the vias that you want to use for remastering. To return to the preferred method after using a mapping file, you must issue clear_redundant_via_mapping.

Arguments

`-all`	Sets the target area to the entire cellview. Attempts to remaster all vias in the cellview. This is the default.
`-allow_num_cut_downsizing [ true \| false ]`
	Permits vias to be remastered to a master with fewer cuts (for example, from two cuts to one), if the `-via_order` argument contains such an order. By default, the number of cuts on a via being remastered will increase or stay the same.
`-annotate all \| unfixed \| skipped \| remastered \| none`
	Creates rectangle annotations in the via color and adds an entry for each via to the Annotation Browser Optimizations section, depending on the given argument:
	`all`	Creates annotations for remastered, unfixed and skipped vias.
	`none`	Creates no annotations. This is the default.
	`remastered`	Creates annotations for newly remastered vias.
	`skipped`	Creates annotations for vias that already have redundant cuts nearby.
	`unfixed`	Creates annotations for unfixed vias only.
`-annotation_limit` i_count
	Specifies the maximum number of annotations that will be created for each annotation group. The default is 1000.
`-check_antenna [ true \| false ]`
	Checks for and avoids creating new antenna violations. Defaults to `false`.
`-clear_annotations`	Clears all existing optimized via annotations before adding new ones. By default, existing annotations are not cleared.
`-critic`	Causes pushed route segments to be straightened or cleaned up, whenever possible, during processing. Specifying this option has a minor negative impact on processing time. By default, this option is not enabled.
`-do_via_layers` {s_layerName …}
	Limits the remastering to the via layers in the given list. If this argument is not specified, all via layers are processed.
`-double_cut_only [ true \| false ]`
	Restricts processing to double cut vias only. By default, when no via mappings are given, larger enclosure single cut vias are tried after all double cut vias have been tried.
`-exclude_net` {s_netName …}
	Specifies the names of nets to exclude from processing.
`-exclude_set` d_setObj	Excludes from processing vias, routes and nets in the given set.
`-exclude_type` {`[power][ground][clock]`}
	Specifies one or more net types to exclude from processing.
`-exclude_via_pin [ true \| false ]`
	When `true`, excludes via pins (top level only) from being remastered. Default: `true`
`-ignore_active_route_status [ true \| false ]`
	Processes vias belonging to fixed routes. By default, these vias are skipped.
`-insertion_mode`	Specifies the insertion mode or a list of insertion modes to use. If a list of modes is specified, the modes will be processed in the order given in the list.
	`on_wire`	Puts remastered vias on the connecting wire without pushing routes.
	`off_wire`	Puts remastered vias off the connecting wire without pushing routes.
	`on_wire_push`	Puts remastered vias on the connecting wire, pushing surrounding shapes, if needed.
	`off_wire_push`	Puts remastered vias off the connecting wire, pushing surrounding shapes, if needed.
	`all`	Uses insertion mode techniques in the following order: `on_wire`, `off_wire`, `on_wire_push`, `off_wire_push`. If a via cannot be remastered using one technique, the next technique is attempted, and so on.
`-lock_layers` {s_layerName…}
	Specifies the metal layers that must not be changed during this operation.
`-lock_pin_metal [ true \| false ]`
	If `true`, no additional metal will be added if the via touches a pin. If a pin shape is present at the via on the above/below layer, then that metal layer is considered locked for the purpose of remastering that particular via. The above/below layers are considered independently, so locking on one does not affect the other. Default: `false`
`-optimize_multi_cut_via_enclosure` i_numCut
	Specifies the maximum number of cuts in a multi-cut via for which larger enclosure via masters will be considered. Default: 1 (Vias that already have two or more cuts will not be processed)
`-output_pins_only [ true \| false ]`
	Limits processing to vias on output pins. Default: `false`
`-override_valid_routing_vias [ true \| false ]`
	When `true`, permits a via master that is defined in the technology file and specified in the `-valid_routing_vias` argument to be used for remastering even if it is not included in the `validRoutingVias` or `extendedValidRoutingVias` constraint for the net`.` Default: `false`
`-push_limit {1\|2\|3\|4\|5}`	Limits the number of routes that can be pushed when remastering a via using a push insertion mode. Default: 2
`-region` {f_xlo f_ylo f_xhi f_yhi}
	Attempts to remaster vias only in the specified area of the cellview, given by the lower left and upper right coordinates.
`-set` d_setObj	Attempts only to remaster vias in the specified set.
`-silent [ true \| false ]`
	When `true`, outputs only essential messages. By default and when `false`, additional status messages are output.
`-single_cut_only [ true \| false ]`
	Restricts processing to single-cut vias only. By default, when no via mappings are given, larger enclosure single cut vias are tried after all double cut vias have been tried.
`-threads` i_threads	Specifies the number of threads or processors to use in parallel to run this command. By default, if multi-threading has been enabled (enable_multithreading), the session threads are used, otherwise, one processor is used.
`-use_grid {mfg \| route}`
	Specifies the grid to snap to for vias and pushed wires:
	`mfg`	Uses the manufacturing grid from the technology file. This is default setting.
	`route`	Uses the routing grid from the technology file. This is the coarsest grid. Snapping to this grid reduces the redundancy rate.
`-valid_routing_vias` {s_viaName…}
	Specifies the list of via masters to consider for remastering a given via, in no particular order. String patterns are not considered. Only via masters in the `validRoutingVias` or `extendedValidRoutingVias` constraint for the net will be considered, unless `-override_valid_routing_vias` is set to `true`. Default: All available via masters are considered.
`-via_order` {s_viaName…}
	Specifies the list of via masters, in the preferred order, to consider first when remastering a given via. Other potential via masters that are not in this list are considered next. String patterns, such as “`v_2cut_`”, which could match `v01_2cut_N`, `v01_2cut_S`, `v02_2cut_N`, and so on, are supported.
`-via_order_only [ true \| false ]`
	When `true`, limits remastering to new via masters that are given by the `-via_order` argument and are also included in the `-valid_routing_vias` list. By default, all via masters are considered, with priority given to those in the `-via_order` list.
`-window_id` i_windowID	Specifies the window to process. If this argument is not specified, the active artwork window is used.

Examples

The following example remasters vias on-wire for via layers V1 and V2 of entire design.

remaster_via -all -do_via_layers {"V1" "V2"} -insertion_mode on_wire

The following example inserts redundant vias for all vias in the design using all insertion mode techniques.

remaster_via -all -insertion_mode all

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023

remaster_via

Description

Arguments

Examples

Related Topics

Virtuoso Space-based Router Command ReferenceProduct Version IC23.1, September 2023

remaster_via

Description

Arguments

Examples

Related Topics

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023