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Switched to SDC file with input/output delays #4127

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Merged
maliberty merged 1 commit into from
Apr 9, 2026
Merged

Switched to SDC file with input/output delays #4127

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8 changes: 7 additions & 1 deletion flow/designs/rapidus2hp/hercules_idecode/prects_0.3.sdc
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Original file line number Diff line number Diff line change
Expand Up @@ -13,4 +13,10 @@ set_load [convert_cap_value 10] [all_outputs]
set_max_capacitance [convert_cap_value 10] [all_inputs]

create_clock -name "clk" -add -period $clk_period \
-waveform [list 0.0 [expr 0.5*$clk_period]] [get_ports clk]
-waveform [list 0.0 [expr { 0.5 * $clk_period }]] [get_ports clk]

set_clock_latency $clk_period clk

### Setup input delay is set to 20% of CT
set_input_delay 0.150 -clock clk [all_inputs]
set_output_delay 0.050 -clock clk [all_outputs]
Comment on lines +20 to +22
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@maliberty maliberty Apr 9, 2026

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Does this need to handle convert_time_value ? It might be better to use an expression to avoid it becoming stale if clk_period changes.

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@jeffng-or jeffng-or Apr 9, 2026

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it doesn't need convert_time_value since the SDC is PDK 0.3 specific. I can switch it to a percentage in a follow up PR.

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@maliberty maliberty Apr 9, 2026

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Ok then a bit strange to have

set clk_period 370
convert_time_value clk_period

8 changes: 4 additions & 4 deletions flow/designs/rapidus2hp/hercules_idecode/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -48,11 +48,11 @@
"compare": "<="
},
"globalroute__timing__setup__ws": {
"value": -0.0383,
"value": -0.0596,
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -0.473,
"value": -1.04,
"compare": ">="
},
"globalroute__timing__hold__ws": {
Expand All @@ -64,11 +64,11 @@
"compare": ">="
},
"finish__timing__setup__ws": {
"value": -0.0383,
"value": -0.0596,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -0.473,
"value": -1.04,
"compare": ">="
},
"finish__timing__hold__ws": {
Expand Down
8 changes: 4 additions & 4 deletions flow/designs/rapidus2hp/hercules_idecode/rules-verific.json
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Original file line number Diff line number Diff line change
Expand Up @@ -48,11 +48,11 @@
"compare": "<="
},
"globalroute__timing__setup__ws": {
"value": -0.0225,
"value": -0.0894,
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -0.0993,
"value": -0.314,
"compare": ">="
},
"globalroute__timing__hold__ws": {
Expand All @@ -64,11 +64,11 @@
"compare": ">="
},
"finish__timing__setup__ws": {
"value": -0.0225,
"value": -0.0894,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -0.0993,
"value": -0.314,
"compare": ">="
},
"finish__timing__hold__ws": {
Expand Down
6 changes: 6 additions & 0 deletions flow/designs/rapidus2hp/hercules_is_int/prects_0.3.sdc
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Original file line number Diff line number Diff line change
Expand Up @@ -14,3 +14,9 @@ set_max_capacitance [convert_cap_value 10] [all_inputs]

create_clock -name "clk" -add -period $clk_period \
-waveform [list 0.0 [expr { 0.5 * $clk_period }]] [get_ports clk]

set_clock_latency $clk_period clk

### Setup input delay is set to 20% of CT
set_input_delay 0.150 -clock clk [all_inputs]
set_output_delay 0.050 -clock clk [all_outputs]
22 changes: 11 additions & 11 deletions flow/designs/rapidus2hp/hercules_is_int/rules-base.json
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Original file line number Diff line number Diff line change
Expand Up @@ -12,27 +12,27 @@
"compare": "<="
},
"placeopt__design__instance__count__stdcell": {
"value": 647733,
"value": 647436,
"compare": "<="
},
"detailedplace__design__violations": {
"value": 0,
"compare": "=="
},
"cts__design__instance__count__setup_buffer": {
"value": 56325,
"value": 56299,
"compare": "<="
},
"cts__design__instance__count__hold_buffer": {
"value": 56325,
"value": 56299,
"compare": "<="
},
"cts__timing__setup__ws": {
"value": -0.0185,
"value": -0.114,
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -0.074,
"value": -85.7,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand All @@ -48,35 +48,35 @@
"compare": "<="
},
"globalroute__timing__setup__ws": {
"value": -0.0815,
"value": -0.248,
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -65.4,
"value": -567.0,
"compare": ">="
},
"globalroute__timing__hold__ws": {
"value": -0.0125,
"compare": ">="
},
"globalroute__timing__hold__tns": {
"value": -0.05,
"value": -0.302,
"compare": ">="
},
"finish__timing__setup__ws": {
"value": -0.0815,
"value": -0.248,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -65.4,
"value": -567.0,
"compare": ">="
},
"finish__timing__hold__ws": {
"value": -0.0125,
"compare": ">="
},
"finish__timing__hold__tns": {
"value": -0.05,
"value": -0.302,
"compare": ">="
},
"finish__design__instance__area": {
Expand Down
16 changes: 8 additions & 8 deletions flow/designs/rapidus2hp/hercules_is_int/rules-verific.json
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Original file line number Diff line number Diff line change
Expand Up @@ -28,11 +28,11 @@
"compare": "<="
},
"cts__timing__setup__ws": {
"value": -0.0185,
"value": -0.141,
"compare": ">="
},
"cts__timing__setup__tns": {
"value": -0.074,
"value": -99.3,
"compare": ">="
},
"cts__timing__hold__ws": {
Expand All @@ -48,35 +48,35 @@
"compare": "<="
},
"globalroute__timing__setup__ws": {
"value": -0.133,
"value": -0.201,
"compare": ">="
},
"globalroute__timing__setup__tns": {
"value": -123.0,
"value": -537.0,
"compare": ">="
},
"globalroute__timing__hold__ws": {
"value": -0.0125,
"compare": ">="
},
"globalroute__timing__hold__tns": {
"value": -0.05,
"value": -0.23,
"compare": ">="
},
"finish__timing__setup__ws": {
"value": -0.133,
"value": -0.201,
"compare": ">="
},
"finish__timing__setup__tns": {
"value": -123.0,
"value": -537.0,
"compare": ">="
},
"finish__timing__hold__ws": {
"value": -0.0125,
"compare": ">="
},
"finish__timing__hold__tns": {
"value": -0.05,
"value": -0.23,
"compare": ">="
},
"finish__design__instance__area": {
Expand Down