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update sky130hd layers' resistance and lower gcd core utilization #4285

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Merged
eder-matheus merged 4 commits into from
Jun 10, 2026
Merged

update sky130hd layers' resistance and lower gcd core utilization #4285

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3764678
update sky130hd layer resistance with segment-based regression results
AcKoucher May 19, 2026
a5c3e35
lower sky130hd/gcd core utilization
AcKoucher Jun 8, 2026
df4fe44
flow: update rules
github-actions[bot] Jun 9, 2026
ee0be9a
partial revert of df4fe44 due to odd updateRules behavior
AcKoucher Jun 10, 2026
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2 changes: 1 addition & 1 deletion flow/designs/sky130hd/gcd/config.mk
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Expand Up @@ -7,7 +7,7 @@ export SDC_FILE = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.
# Adders degrade GCD
export ADDER_MAP_FILE :=

export CORE_UTILIZATION = 40
export CORE_UTILIZATION = 38
export TNS_END_PERCENT = 100
export SWAP_ARITH_OPERATORS = 1
export OPENROAD_HIERARCHICAL = 1
13 changes: 5 additions & 8 deletions flow/platforms/sky130hd/setRC.tcl
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@@ -1,12 +1,9 @@
# correlateRC.py gcd,ibex,aes,jpeg,chameleon,riscv32i,chameleon_hier
# cap units pf/um
set_layer_rc -layer li1 -capacitance 1.499e-04 -resistance 7.176e-02
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set_layer_rc -layer met1 -capacitance 1.72375E-04 -resistance 8.929e-04
set_layer_rc -layer met2 -capacitance 1.36233E-04 -resistance 8.929e-04
set_layer_rc -layer met3 -capacitance 2.14962E-04 -resistance 1.567e-04
set_layer_rc -layer met4 -capacitance 1.48128E-04 -resistance 1.567e-04
set_layer_rc -layer met5 -capacitance 1.54087E-04 -resistance 1.781e-05
# end correlate
set_layer_rc -layer met1 -capacitance 1.72375E-04 -resistance 1.20565E-03
set_layer_rc -layer met2 -capacitance 1.36233E-04 -resistance 1.22132E-03
set_layer_rc -layer met3 -capacitance 2.14962E-04 -resistance 1.66281E-04
set_layer_rc -layer met4 -capacitance 1.48128E-04 -resistance 1.68093E-04
set_layer_rc -layer met5 -capacitance 1.54087E-04 -resistance 1.83558E-05

set_layer_rc -via mcon -resistance 9.249146E-3
set_layer_rc -via via -resistance 4.5E-3
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