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| pepijndevos | How does one interpret the ROUTING attribute in Nextpnr JSON output? | 14:47 |
|---|---|---|
| pepijndevos | Example: 'ROUTING': 'R16C43_S10;R16C43_Q3_S100;1;R17C43_E20;R17C43_S101_E200;1;R17C45_E20;R17C45_E202_E200;1;R17C47_D1;R17C47_E202_D1;1;R16C43_C3;R16C43_X02_C3;1;R16C43_W10;R16C43_Q3_W100;1;R16C42_C5;R16C42_W101_C5;1;R16C43_Q3;;1;R16C43_C2;R16C43_X02_C2;1;R16C43_X02;R16C43_Q3_X02;1' | 14:50 |
| pepijndevos | It seems to be destWire;pip;1, but sometimes also just destWire;;1, not sure if it's always 1 and what that signifies. | 14:52 |
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| daveshah | It is a serialisation of the wires field | 16:01 |
| daveshah | pip is empty for the source wire | 16:01 |
| daveshah | The 1 is the binding strength (1=STRENGTH_WEAK) used to signify special routing that should not be ripped up (clock routing by a special pass, hypothetical manual routing, etc) | 16:02 |
| daveshah | pepijndevos: ^ | 16:02 |
| * pepijndevos has no idea what the wires field contains | 16:04 | |
| pepijndevos | But ok, basically if I just grep for all the pips and bitgen them it should be fine | 16:05 |
| daveshah | Well just split by ; and pick out 1 every 3 | 16:07 |
| daveshah | The middle one | 16:07 |
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