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| cr1901 | Is it possible to get yosys' stat command to return stats of submodules, or, for instance "do a select for all cells that originated from a specific verilog module 'foo' and count them" | 00:47 |
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| cr1901 | (cell overlap w/ other modules allowed, for the case where yosys reused cells between two modules after flattening) | 00:48 |
| cr1901 | I did "run yosys on the constituent submodules alone and print stats for each one", but that doesn't tell the whole story for "where is the cell/LUT/FF usage highest in my design?" | 00:49 |
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| cr1901 | Answer to my question: 'submod -name "my_name" [selection]'. Then run "stat -json" | 02:10 |
| cr1901 | yosys flattening preserves the original module name for all cells at least for Amaranth-generated Verilog; so a command like "submod -name submodule_name TopLevelModule/each_submodule_name.*" does the job. Idk if this applies in general | 02:14 |
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| whitequark[cis] | cr1901: that's not specific to Amaranth | 03:44 |
| whitequark[cis] | hdlname composition is done for everything | 03:44 |
| cr1901 | I'm not selecting based on the hdlname attribute (and don't remember the syntax for selecting on attribute), but noted | 03:44 |
| cr1901 | I wrote a script that calls yosys and tabulates resource usage by extracting the JSON from stats: http://gopher.wdj-consulting.com:70/paste/48ed014a-b038-44c0-a852-779a68180f16.txt | 03:52 |
| cr1901 | (oh right, this depends on not-merged features of Amaranth (#904), so not useful to general public yet...) | 04:00 |
| whitequark[cis] | ah right | 05:26 |
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