Merge pull request #1431 from The-OpenROAD-Project-staging/portbuffer

Add port buffering control

Author: maliberty

flow/scripts/resize.tcl

@@ -27,9 +27,14 @@ puts ""
 set_dont_use $::env(DONT_USE_CELLS)
 
 # Do not buffer chip-level designs
-if {![info exists ::env(FOOTPRINT)]} {
-  puts "Perform port buffering..."
-  buffer_ports
+# by default, IO ports will be buffered
+# to not buffer IO ports, set environment variable
+# DONT_BUFFER_PORT = 1
+if { ![info exists ::env(FOOTPRINT)] } {
+  if { ![info exists ::env(DONT_BUFFER_PORTS)] || $::env(DONT_BUFFER_PORTS) == 0 } {
+    puts "Perform port buffering..."
+    buffer_ports
+  }
 }
 
 puts "Perform buffer insertion..."