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OpenSTA/bug_report_missing_write_ga...

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Bug Report: Missing SWIG binding for write_gate_spice_cmd

Summary

write_gate_spice Tcl command always fails with invalid command name "write_gate_spice_cmd" because the underlying C++ SWIG binding is not registered.

Details

  • write_gate_spice is defined as a Tcl proc in spice/WriteSpice.tcl:138
  • It calls write_gate_spice_cmd at line 198 to invoke the C++ implementation
  • write_gate_spice_cmd is not registered in any Tcl namespace (neither global nor ::sta::)
  • In contrast, write_path_spice_cmd IS correctly registered as ::sta::write_path_spice_cmd

Reproduction

sta::sta -no_init -no_splash -exit /dev/stdin <<'EOF'
puts [info commands ::sta::write_path_spice_cmd]  ;# returns ::sta::write_path_spice_cmd
puts [info commands ::sta::write_gate_spice_cmd]  ;# returns empty
EOF

Impact

All write_gate_spice calls silently fail when wrapped in catch, or crash sta when called directly. The C++ implementation likely exists in WriteSpice.cc but the SWIG .i file is missing the binding declaration for write_gate_spice_cmd.

Affected Test Files

The following test files had write_gate_spice catch blocks that always produced error output:

  • spice/test/spice_gate_advanced.tcl
  • spice/test/spice_gate_cells.tcl
  • spice/test/spice_gcd_gate.tcl
  • spice/test/spice_gcd_path.tcl
  • spice/test/spice_multipath.tcl
  • spice/test/spice_subckt_file.tcl
  • spice/test/spice_write_options.tcl