#prjunnamed on 2025-07-12 — irc logs at libera.catirclogs.org

2025-05-08 06:38 whitequark[cis] changed the topic of #prjunnamed to: FPGA toolchain project · rule #0 of prjunnamed: no one should ever burn out building software · https://prjunnamed.org · https://github.com/prjunnamed/prjunnamed · logs: https://libera.catirclogs.org/prjunnamed

05:59 _whitelogger has joined #prjunnamed

06:26 _whitelogger has joined #prjunnamed

11:25 _whitelogger has joined #prjunnamed

20:55 <_whitenotifier-4> [prjunnamed] wanda-phi created branch display-control-net - https://github.com/prjunnamed/prjunnamed

20:56 <_whitenotifier-4> [prjunnamed] wanda-phi opened pull request #92: netlist: implement `Display` for `ControlNet`. - https://github.com/prjunnamed/prjunnamed/pull/92

20:56 <_whitenotifier-4> [prjunnamed] github-merge-queue[bot] created branch gh-readonly-queue/main/pr-92-fd34843ee466e804c954384e36a2144d10c7a221 - https://github.com/prjunnamed/prjunnamed

20:56 <_whitenotifier-4> [prjunnamed] github-merge-queue[bot] deleted branch gh-readonly-queue/main/pr-92-fd34843ee466e804c954384e36a2144d10c7a221 - https://github.com/prjunnamed/prjunnamed

20:56 <_whitenotifier-4> [prjunnamed/prjunnamed] github-merge-queue[bot] pushed 1 commit to main [+0/-0/±1] https://github.com/prjunnamed/prjunnamed/compare/fd34843ee466...d5fcec83cf4d

20:56 <_whitenotifier-4> [prjunnamed/prjunnamed] wanda-phi d5fcec8 - netlist: implement `Display` for `ControlNet`.

20:56 <_whitenotifier-4> [prjunnamed] wanda-phi deleted branch display-control-net - https://github.com/prjunnamed/prjunnamed

20:56 <_whitenotifier-4> [prjunnamed] wanda-phi closed pull request #92: netlist: implement `Display` for `ControlNet`. - https://github.com/prjunnamed/prjunnamed/pull/92

20:59 <_whitenotifier-4> [prjunnamed] wanda-phi created branch chain-rebalance - https://github.com/prjunnamed/prjunnamed

20:59 <_whitenotifier-4> [prjunnamed] wanda-phi opened pull request #93: generic: add `chain_rebalance` pass. - https://github.com/prjunnamed/prjunnamed/pull/93

22:35 Wanda[cis] has joined #prjunnamed

22:35 * Wanda[cis] uploaded an image: (493KiB) < https://catircservices.org/_irc/v1/media/download/Ab9Jr9NBoCilxfTzXXWOW8y3-jr7NVzVdCMl8JjnOdbWgwQr3oNiOKgcTnz27r42Ek2iV-7JMgG0ZIFpgk6jOhq_8AAAAAAAAG1hdHJpeC5vcmcvdG9hc0lkSVpkRkl2YmdGSmFMS3RDbU1I >

22:35 <Wanda[cis]> I am now capable of optimizing perfectly understandable simple netlists into complete spaghetti (but with significantly improved logic depth), does that mean prjunnamed is now a serious synthesis tool

22:36 galibert[m] has joined #prjunnamed

22:36 <galibert[m]> It's a serious kitchen tool at least

22:36 <Wanda[cis]> the above is the result of running the new rebalancing pass on:... (full message at <https://catircservices.org/_irc/v1/media/download/Ae1wyMZziwrQ8styP1rsNCbjz87qiRj6w0VwLBJ3xrYFZ1yfJGCXRDzW2LcSaD5VJuW2XLjkci3YNlxpQzDMDSi_8AAAAAAAAGNhdGlyY3NlcnZpY2VzLm9yZy9rS3hHeGxDd0xsS3lRb01KempWeER0dWI>)

22:36 <galibert[m]> (hmmm spaghetti)

22:37 <Wanda[cis]> apparently the resulting structure is known as a "Ladner-Fischer adder"

22:38 <galibert[m]> Oh?

22:38 <Wanda[cis]> (I didn't know that when I designed the pass)

22:39 <Wanda[cis]> oh, I made an optimization pass that rebalances long logic chains; significantly decreases depth at the cost of area

22:40 <Wanda[cis]> the underlying idea is similar to how carry lookahead adders are constructed

22:40 <galibert[m]> Does it take the size of LUTs into account?

22:41 <Wanda[cis]> unfortunately not

22:41 <Wanda[cis]> it's uh. very crude.

22:42 <galibert[m]> heh, at least it's something

23:50 <_whitenotifier-4> [prjunnamed] wanda-phi synchronize pull request #93: generic: add `chain_rebalance` pass. - https://github.com/prjunnamed/prjunnamed/pull/93