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SDC expansion with OpenSTA #5237

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SDC expansion with OpenSTA #5237

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225a45c
icell_liberty: start
widlarizer Jul 16, 2025
aec8c98
ff: split out type-only information
widlarizer Jul 18, 2025
764ccc8
icell_liberty: flops
widlarizer Jul 18, 2025
9437941
icell_liberty: flop harder
widlarizer Jul 18, 2025
c9ef434
sdc_expand, opensta: start
widlarizer Jul 18, 2025
f284751
opensta: quiet net width mismatch warning
widlarizer Jul 31, 2025
36c30dc
opensta: quiet blackbox warning
widlarizer Oct 2, 2025
8993ba2
sdc_expand: log header
widlarizer Oct 2, 2025
f027cfb
sdc_expand: cleanup
widlarizer Oct 8, 2025
b2ed772
rtlil: undeprecate builtin_ff_cell_types
widlarizer Oct 8, 2025
8179ba1
icell_liberty: refactor and add help
widlarizer Nov 14, 2025
8f17822
sdc_expand, opensta: typos
widlarizer Nov 14, 2025
ab03d33
opensta: opensta.exe scratchpad variable
widlarizer Nov 14, 2025
838732e
icell_liberty: simplify
widlarizer Nov 14, 2025
526c5e9
opensta, sdc_expand: more scratchpad
widlarizer Nov 14, 2025
3651eec
opensta: refactor default command
widlarizer Nov 14, 2025
db6d50e
opensta, sdc_expand: fix help
widlarizer Nov 14, 2025
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4 changes: 3 additions & 1 deletion techlibs/common/opensta.cc
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#include "kernel/rtlil.h"
#include "kernel/log.h"
#include "techlibs/common/opensta.h"

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USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
Expand All @@ -16,7 +16,9 @@
log("\n");
log(" opensta [options]\n");
log("\n");
// TOOD
log("Expand SDC file with OpenSTA.\n");
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@Ravenslofty Ravenslofty Nov 14, 2025

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Idle bikeshedding: ABC9 has the abc9_exe pass which is in charge of actually running ABC; I wonder if it would be more useful to call this opensta_exe, as it does a similar task.

(No is a valid answer)

log("Internal command like abc. Requires a well-formed design.\n");
log("For general SDC expansion with OpenSTA, use the sdc_expand command.\n");
log("\n");
log(" -exe <command>\n");
log(" use <command> to run OpenSTA instead of \"%s\"\n", default_opensta_cmd);
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5 changes: 3 additions & 2 deletions techlibs/common/sdc_expand.cc
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@@ -1,21 +1,22 @@
#include "kernel/rtlil.h"
#include "kernel/log.h"
#include "techlibs/common/opensta.h"

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USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN

struct SdcExpandPass : public ScriptPass
{
SdcExpandPass() : ScriptPass("sdc_expand", "run OpenSTA") { }
SdcExpandPass() : ScriptPass("sdc_expand", "expand SDC design with opensta") { }

void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" sdc_expand [options]\n");
log("\n");
// TODO
log("Expand SDC file with opensta based on arbitrary current design.\n");
log("Changes the design but only temporarily.\n");
log("\n");
log(" -exe <command>\n");
log(" use <command> to run OpenSTA instead of \"%s\"\n", default_opensta_cmd);
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