dpl: easier setting for using negotiation legalizer

docs/user/FlowVariables.md

@@ -319,6 +319,7 @@ configuration file.
 | <a name="TNS_END_PERCENT"></a>TNS_END_PERCENT| Default TNS_END_PERCENT value for post CTS timing repair. Try fixing all violating endpoints by default (reduce to 5% for runtime). Specifies how many percent of violating paths to fix [0-100]. Worst path will always be fixed.| 100|
 | <a name="UNSET_ABC9_BOX_CELLS"></a>UNSET_ABC9_BOX_CELLS| List of cells to unset the abc9_box attribute on| |
 | <a name="USE_FILL"></a>USE_FILL| Whether to perform metal density filling.| 0|
+| <a name="USE_NEGOTIATION"></a>USE_NEGOTIATION| Enable using negotiation legalizer for detailed placement.| 0|
 | <a name="VERILOG_DEFINES"></a>VERILOG_DEFINES| Preprocessor defines passed to the language frontend. Example: `-D HPDCACHE_ASSERT_OFF`| |
 | <a name="VERILOG_FILES"></a>VERILOG_FILES| The path to the design Verilog/SystemVerilog files providing a description of modules.| |
 | <a name="VERILOG_INCLUDE_DIRS"></a>VERILOG_INCLUDE_DIRS| Specifies the include directories for the Verilog input files.| |
@@ -655,4 +656,5 @@ configuration file.
 - [TAP_CELL_NAME](#TAP_CELL_NAME)
 - [TECH_LEF](#TECH_LEF)
 - [USE_FILL](#USE_FILL)
+- [USE_NEGOTIATION](#USE_NEGOTIATION)
 

flow/scripts/cts.tcl

@@ -46,7 +46,9 @@ set_placement_padding -global \
   -left $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT) \
   -right $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT)
 
-set result [catch { log_cmd detailed_placement } msg]
+set dpl_args {}
+append_env_var dpl_args USE_NEGOTIATION -use_negotiation 0
+set result [catch { log_cmd detailed_placement {*}$dpl_args } msg]
 if { $result != 0 } {
   save_progress 4_1_error
   error "Detailed placement failed in CTS: $msg"
@@ -70,7 +72,7 @@ if { !$::env(SKIP_CTS_REPAIR_TIMING) } {
     run_lec_test 4_rsz 4_before_rsz_lec.v 4_after_rsz_lec.v
   }
 
-  set result [catch { log_cmd detailed_placement } msg]
+  set result [catch { log_cmd detailed_placement {*}$dpl_args } msg]
   if { $result != 0 } {
     save_progress 4_1_error
     error "Detailed placement failed in CTS: $msg"

flow/scripts/detail_place.tcl

@@ -15,7 +15,9 @@ proc do_dpl { } {
   set_placement_padding -global \
     -left $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT) \
     -right $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT)
-  log_cmd detailed_placement {*}[env_var_or_empty DETAIL_PLACEMENT_ARGS]
+  set dpl_args [env_var_or_empty DETAIL_PLACEMENT_ARGS]
+  append_env_var dpl_args USE_NEGOTIATION -use_negotiation 0
+  log_cmd detailed_placement {*}$dpl_args
 
   if { $::env(ENABLE_DPO) } {
     if { [env_var_exists_and_non_empty DPO_MAX_DISPLACEMENT] } {

flow/scripts/global_route.tcl

@@ -61,8 +61,10 @@ proc global_route_helper { } {
 
     # Running DPL to fix overlapped instances
     # Run to get modified net by DPL
+    set dpl_args {}
+    append_env_var dpl_args USE_NEGOTIATION -use_negotiation 0
     log_cmd global_route -start_incremental
-    log_cmd detailed_placement
+    log_cmd detailed_placement {*}$dpl_args
     # Route only the modified net by DPL
     log_cmd global_route -end_incremental {*}$res_aware \
       -congestion_report_file $::env(REPORTS_DIR)/congestion_post_repair_design.rpt
@@ -80,7 +82,7 @@ proc global_route_helper { } {
     # Running DPL to fix overlapped instances
     # Run to get modified net by DPL
     log_cmd global_route -start_incremental
-    log_cmd detailed_placement
+    log_cmd detailed_placement {*}$dpl_args
     check_placement -verbose
     # Route only the modified net by DPL
     log_cmd global_route -end_incremental {*}$res_aware \

flow/scripts/variables.yaml

@@ -600,6 +600,10 @@ DPO_MAX_DISPLACEMENT:
   description: |
     Specifies how far an instance can be moved when optimizing.
   default: 5 1
+USE_NEGOTIATION:
+  description: |
+    Enable using negotiation legalizer for detailed placement.
+  default: 0
 GPL_TIMING_DRIVEN:
   description: |
     Specifies whether the placer should use timing driven placement.