global route: add GLOBAL_ROUTE_ARGS env variable

oharboe · oharboe · commit eb9c629f86eb · 2023-01-25T12:41:40.000+01:00
it defaults to the existing arguments.

Adjusting GLOBAL_ROUTE_ARGS can be useful to terminate the global route,
so as to get a congestion report early to figure out why global route
is taking a long time.

Signed-off-by: Øyvind Harboe &lt;oyvind.harboe@zylin.com&gt;
diff --git a/flow/scripts/global_route.tcl b/flow/scripts/global_route.tcl
@@ -14,9 +14,8 @@ if {[info exist env(FASTROUTE_TCL)]} {
 }
 
 global_route -guide_file $env(RESULTS_DIR)/route.guide \
-               -congestion_iterations 100 \
                -congestion_report_file $env(REPORTS_DIR)/congestion.rpt \
-               -verbose
+               {*}[expr {[info exists ::env(GLOBAL_ROUTE_ARGS)] ? $::env(GLOBAL_ROUTE_ARGS) : {-congestion_iterations 100 -verbose}}]
 
 set_propagated_clock [all_clocks]
 estimate_parasitics -global_routing

Original file line number	Diff line number	Diff line change
`@@ -14,9 +14,8 @@ if {[info exist env(FASTROUTE_TCL)]} {`
`14`	`14`	`}`
`15`	`15`
`16`	`16`	`global_route -guide_file $env(RESULTS_DIR)/route.guide \`
`17`		`- -congestion_iterations 100 \`
`18`	`17`	`-congestion_report_file $env(REPORTS_DIR)/congestion.rpt \`
`19`		`- -verbose`
	`18`	`+ {*}[expr {[info exists ::env(GLOBAL_ROUTE_ARGS)] ? $::env(GLOBAL_ROUTE_ARGS) : {-congestion_iterations 100 -verbose}}]`
`20`	`19`
`21`	`20`	`set_propagated_clock [all_clocks]`
`22`	`21`	`estimate_parasitics -global_routing`