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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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14 changes: 7 additions & 7 deletions flow/designs/sky130hd/chameleon/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -38,11 +38,11 @@
"compare": "<="
},
"cts__timing__setup__ws": {
"value": -0.962,
"value": -1.33,
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -6.72,
"value": -12.3,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand All @@ -54,15 +54,15 @@
"compare": ">="
},
"globalroute__antenna_diodes_count": {
"value": 200,
"value": 249,
"compare": "<="
},
"globalroute__timing__setup__ws": {
"value": -0.943,
"value": -1.26,
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -5.7,
"value": -11.4,
"compare": ">="
},
"globalroute__timing__hold__ws": {
Expand Down Expand Up @@ -90,11 +90,11 @@
"compare": "<="
},
"finish__timing__setup__ws": {
"value": -0.881,
"value": -1.14,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -6.91,
"value": -8.2,
"compare": ">="
},
"finish__timing__hold__ws": {
Expand Down
2 changes: 1 addition & 1 deletion flow/designs/sky130hd/gcd/config.mk
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Original file line number Diff line number Diff line change
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
2 changes: 1 addition & 1 deletion flow/designs/sky130hd/gcd/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -68.8,
"value": -70.3,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand Down
6 changes: 3 additions & 3 deletions flow/designs/sky130hd/jpeg/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -59.8,
"value": -73.8,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand All @@ -62,7 +62,7 @@
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -113.0,
"value": -131.0,
"compare": ">="
},
"globalroute__timing__hold__ws": {
Expand Down Expand Up @@ -94,7 +94,7 @@
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -42.2,
"value": -55.1,
"compare": ">="
},
"finish__timing__hold__ws": {
Expand Down
8 changes: 4 additions & 4 deletions flow/designs/sky130hd/microwatt/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -345.0,
"value": -356.0,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand All @@ -62,7 +62,7 @@
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -306.0,
"value": -345.0,
"compare": ">="
},
"globalroute__timing__hold__ws": {
Expand All @@ -86,15 +86,15 @@
"compare": "<="
},
"detailedroute__antenna_diodes_count": {
"value": 1352,
"value": 1513,
"compare": "<="
},
"finish__timing__setup__ws": {
"value": -2.65,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -305.0,
"value": -349.0,
"compare": ">="
},
"finish__timing__hold__ws": {
Expand Down
13 changes: 5 additions & 8 deletions flow/platforms/sky130hd/setRC.tcl
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Original file line number Diff line number Diff line change
@@ -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
Comment thread
AcKoucher marked this conversation as resolved.
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
Expand Down