Removed "gds polygon subcell true" from the options for reading
the GF I/O library, as this option is no longer needed with
magic version 8.3.352.  Corrected the netgen setup file for
the _dss silicide block FETs, because these are not actually
asymmetric devices as far as extraction is concerned;  they
are symmetric devices with different length resistors on the
source and the drain.

gf180mcu/custom/scripts/gds_import_io.tcl

diff --git a/gf180mcu/custom/scripts/gds_import_io.tcl b/gf180mcu/custom/scripts/gds_import_io.tcl
index 3a0147e..04be814 100644
--- a/gf180mcu/custom/scripts/gds_import_io.tcl
+++ b/gf180mcu/custom/scripts/gds_import_io.tcl
@@ -1,6 +1,6 @@
 # Set GDS import styles as needed to deal with the I/O cells.
+# NOTE: "gds polygon subcells true" removed since magic v. 8.3.352
+# no longer has the issue of slow reads of complex polygons.
 gds ordering on
-gds polygon subcells true
 gds flatten true
 gds flatglob *_CDNS_*
-# gds noduplicates true

gf180mcu/netgen/gf180mcu_setup.tcl

diff --git a/gf180mcu/netgen/gf180mcu_setup.tcl b/gf180mcu/netgen/gf180mcu_setup.tcl
index 41fd04e..f6e6b38 100644
--- a/gf180mcu/netgen/gf180mcu_setup.tcl
+++ b/gf180mcu/netgen/gf180mcu_setup.tcl
@@ -130,9 +130,11 @@
     }
 }
 
-#-------------------------------------------
+#------------------------------------------------------------------
 # (MOS) transistors
-#-------------------------------------------
+# (NOTE:  _dss devices are treated as symmetric because the
+#  salicide block is present on both sides of the gate.)
+#------------------------------------------------------------------
 
 set devices {}
 lappend devices nfet_03v3
@@ -140,6 +142,10 @@
 lappend devices nfet_06v0
 lappend devices pfet_06v0
 lappend devices nfet_06v0_nvt
+lappend devices nfet_03v3_dss
+lappend devices pfet_03v3_dss
+lappend devices nfet_06v0_dss
+lappend devices pfet_06v0_dss
 
 foreach dev $devices {
     if {[lsearch $cells1 $dev] >= 0} {
@@ -171,10 +177,6 @@
 #-------------------------------------------
 
 set devices {}
-lappend devices nfet_03v3_dss
-lappend devices pfet_03v3_dss
-lappend devices nfet_06v0_dss
-lappend devices pfet_06v0_dss
 lappend devices nfet_10v0_asym
 lappend devices pfet_10v0_asym