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add gcd to gf180 - #4756

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maliberty merged 1 commit into
The-OpenROAD-Project:masterfrom
The-OpenROAD-Project-staging:gf180-gcd
Oct 28, 2026
Merged

maliberty merged 1 commit into
The-OpenROAD-Project:masterfrom
The-OpenROAD-Project-staging:gf180-gcd

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Signed-off-by: Matt Liberty <mliberty@precisioninno.com>
@maliberty maliberty self-assigned this Oct 28, 2026
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chatgpt-codex-connector Bot commented Oct 28, 2026 •

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Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review Status Commit Review trigger
📝 Code Review ⚠️ Failed 2026-10-28T05:13:37.874890Z
We couldn’t complete this review. Comment @codex review to try again.
72aa19c PR opened
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Code Review

This pull request introduces the configuration and constraint files for the GCD design on the GF180 platform. The review feedback points out two critical issues: the use of an undefined variable $(DESIGN_HOME) in config.mk which will lead to build failures, and an overly aggressive clock period of 3ns in constraint.sdc that is unrealistic for the 180nm technology node and should be increased to ensure timing closure.

Comment thread flow/designs/gf180/gcd/config.mk
Comment thread flow/designs/gf180/gcd/constraint.sdc
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🔍 QoR check

Metrics reflect the PR merge build — i.e. what will land on the target branch.

Commit eb959bd · Jenkins build #1 · Baseline: build · View build on dashboard

62 design(s) checked — 9 with regression(s), 1 without a comparable baseline.

❌ asap7/ethmac_lvt base — 1 failing metric(s)
Metric target base delta limit band
cts__timing__setup__tns -293.892 -218.431 -34.547% -278.431 PeriodPadding 20.000%
❌ asap7/gcd base — 1 failing metric(s)
Metric target base delta limit band
cts__timing__setup__tns -214.517 -110.067 -94.897% -172.067 PeriodPadding 20.000%
❌ asap7/mock-alu base — 2 failing metric(s)
Metric target base delta limit band
cts__timing__setup__ws -275.782 -258.599 -6.645% -273.599 PeriodPadding 5.000%
finish__timing__setup__ws -272.690 -256.663 -6.244% -271.663 PeriodPadding 5.000%
❌ asap7/riscv32i base — 1 failing metric(s)
Metric target base delta limit band
finish__timing__setup__tns -15695.800 -6881.070 -128.101% -8257.284 PeriodPadding 20.000%
❌ gt2n/aes base — 2 failing metric(s)
Metric target base delta limit band
finish__timing__hold__tns -549.068 -394.306 -39.249% -473.167 PeriodPadding 20.000%
globalroute__timing__hold__tns -549.068 -394.306 -39.249% -473.167 PeriodPadding 20.000%
❌ gt2n/jpeg base — 1 failing metric(s)
Metric target base delta limit band
cts__timing__setup__tns -1107.750 -715.977 -54.719% -859.172 PeriodPadding 20.000%
❌ nangate45/bp_fe_top base — 1 failing metric(s)
Metric target base delta limit band
finish__timing__setup__tns -5.440 -3.217 -69.098% -3.861 PeriodPadding 20.000%
❌ sky130hd/chameleon base — 1 failing metric(s)
Metric target base delta limit band
globalroute__antenna_diodes_count 114.000 97.000 17.526% 100.000 Metric 0.100%
❌ sky130hs/gcd base — 2 failing metric(s)
Metric target base delta limit band
finish__timing__setup__tns -9.040 -7.083 -27.622% -8.500 PeriodPadding 20.000%
globalroute__timing__setup__tns -10.410 -8.233 -26.432% -9.880 PeriodPadding 20.000%

@maliberty
maliberty merged commit 0fcc418 into The-OpenROAD-Project:master Oct 28, 2026
10 of 12 checks passed
@maliberty
maliberty deleted the gf180-gcd branch October 28, 2026 06:54
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2 participants