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| agg | does anyone know if there's any documentation for the ECP5's ALU54B OP input? the sysDSP usage guide and the libraries reference just say "opcode" without elaboration... | 17:36 |
|---|---|---|
| daveshah | The sim model in Diamond.... | 17:37 |
| daveshah | yes this is horrible, I did ask someone at Lattice if they could produce some better docs but I never heard anything back | 17:37 |
| agg | better than nothing, i'll have a look, thanks! | 17:38 |
| agg | should nextpnr generally manage to pack two MULT18X18D and an ALU54 into one DSP slice? | 17:38 |
| daveshah | No, that's not supported yet | 17:40 |
| agg | what will it do instead, just connect them using general routing? | 17:41 |
| agg | this simulation model has whole chunks of verilog just commented out, good stuff | 17:41 |
| daveshah | I think some stuff has to use dedicated routing, so it just won't route | 17:42 |
| daveshah | Depends exactly what you are doing. Some things should fall back to general routing OK | 17:42 |
| agg | thanks, i'll have a play. and dig into this sim model... | 17:43 |
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