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Add parasitic extraction (PEX) using ORFS rule file #52

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Merged
merged 3 commits into from
May 6, 2025
Merged

Add parasitic extraction (PEX) using ORFS rule file #52

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d675ee3
openroad: add initial parasitic extraction
phsauter May 6, 2025
359c29d
openroad: remove filler & bondpad from LVS netlist
phsauter May 6, 2025
2abb942
yosys: remove unused PERIOD_PS variable
phsauter May 6, 2025
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openroad: add initial parasitic extraction
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@phsauter
phsauter committed May 6, 2025
commit d675ee32e00991e586a28fd14896fc56de417e6e
9 changes: 8 additions & 1 deletion Makefile
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Expand Up @@ -25,11 +25,18 @@ default: help
################
# Dependencies #
################
# Download RCX file used for parasitic extraction from ORFS (configuration got ok by IHP)
IHP_RCX_URL := "https://raw.githubusercontent.com/The-OpenROAD-Project/OpenROAD-flow-scripts/7747f88f70daaeb63f43ce36e71829707b7e3fa7/flow/platforms/ihp-sg13g2/IHP_rcx_patterns.rules"
IHP_RCX_FILE := $(PROJ_DIR)/openroad/IHP_rcx_patterns.rules

## Checkout/update dependencies using Bender
checkout:
checkout: $(IHP_RCX_FILE)
$(BENDER) checkout
git submodule update --init --recursive

$(IHP_RCX_FILE):
curl -L -o $@ $(IHP_RCX_URL)

## Reset dependencies (without updating Bender.lock)
clean-deps:
rm -rf .bender
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3 changes: 2 additions & 1 deletion openroad/.gitignore
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@@ -1,4 +1,5 @@
*.log
save
reports
out
out
IHP_rcx_patterns.rules
2 changes: 1 addition & 1 deletion openroad/openroad.mk
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Expand Up @@ -29,7 +29,7 @@ backend: $(OR_OUT)/$(PROJ_NAME).def
openroad: $(OR_OUT)/$(PROJ_NAME).def

## Place & Route flow using OpenROAD
$(OR_OUT_FILES): $(NETLIST) $(OR_DIR)/scripts/*.tcl $(OR_DIR)/src/*.tcl $(OR_DIR)/src/*.sdc
$(OR_OUT_FILES): $(NETLIST) $(OR_DIR)/scripts/*.tcl $(OR_DIR)/src/*.tcl $(OR_DIR)/src/*.sdc $(OR_DIR)/IHP_rcx_patterns.rules
mkdir -p $(SAVE)
mkdir -p $(REPORTS)
mkdir -p $(OR_OUT)
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8 changes: 6 additions & 2 deletions openroad/scripts/chip.tcl
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Expand Up @@ -272,7 +272,7 @@ utl::report "Perform buffer insertion..."
repair_design -verbose
utl::report "Repair setup and hold violations..."
repair_timing -skip_pin_swap -setup -verbose -repair_tns 100
repair_timing -skip_pin_swap -hold -hold_margin 0.05 -verbose -repair_tns 100
repair_timing -skip_pin_swap -hold -hold_margin 0.1 -verbose -repair_tns 100

utl::report "GRT incremental..."
# Run to get modified net by DPL
Expand Down Expand Up @@ -334,8 +334,12 @@ filler_placement $stdfill
global_connect

save_checkpoint ${log_id_str}_${proj_name}.final
report_metrics "${log_id_str}_${proj_name}.final"
report_image "${log_id_str}_${proj_name}.final" true true false true
define_process_corner -ext_model_index 0 X
extract_parasitics -ext_model_file IHP_rcx_patterns.rules
write_spef out/${proj_name}.spef
read_spef out/${proj_name}.spef; # readback parasitics for OpenSTA
report_metrics "${log_id_str}_${proj_name}.final"

utl::report "Write output"
write_def out/${proj_name}.def
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