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oe1cxw's profile
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩
@oe1cxw

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Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩

@oe1cxw

Neurodiverse trans geek girl. Yosys, RISC-V, SAT/SMT.

She/her/hers
clairexen.net
Joined September 2014

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    1. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 3 Dec 2017
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      Discuss: Which version is "better" and why? How would you solve this?pic.twitter.com/KLuwMPRsoo

      16 replies 5 retweets 16 likes
      Show this thread
    2. josh 💨‏ @steubens7 3 Dec 2017
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      Replying to @oe1cxw

      I wish I knew. with blind ignorance I'd see which took the fewest LUTs

      1 reply 0 retweets 0 likes
    3. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 3 Dec 2017
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      Replying to @steubens7

      Depending on your target arch that would probably either be "check_en", or it wouldn't matter. But would you know what it does if you read it in someones code? Would you be able to spot an error?

      2 replies 0 retweets 0 likes
    4. josh 💨‏ @steubens7 3 Dec 2017
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      Replying to @oe1cxw

      don't see an error

      1 reply 0 retweets 1 like
    5. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 3 Dec 2017
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      Replying to @steubens7

      There is no error. I've formally verified the three versions for logical equivalence. But the question is if you would spot one if the code would have a bug.

      2 replies 0 retweets 0 likes
    6. Ronald Valenzuela‏ @20Mhz 4 Dec 2017
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      Replying to @oe1cxw @steubens7

      I believe what the human think it does is less relevant. Regressions need to be in place, there is no way around simulation. Making it scalable, or adding concurrent assertions may be valid improvements.

      1 reply 0 retweets 1 like
    7. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 4 Dec 2017
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      Replying to @20Mhz @steubens7

      Simulation is nice but I prefer to formally verify things whenever I can. The only way to be sure.

      1 reply 0 retweets 0 likes
    8. Ronald Valenzuela‏ @20Mhz 4 Dec 2017
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      Replying to @oe1cxw

      So far I’ve only used formal verification to validate implementation, here reference is always simulated. Are you suggesting/using formal from spec to RTL? Would like to know more...cheers ✌️

      1 reply 0 retweets 1 like
      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 4 Dec 2017
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      Replying to @20Mhz

      In this case I simply verified the other implementations against _ref for equivalence. (The whole check_en stuff is part of another formal proof.) See http://svn.clifford.at/handicraft/2017/wormux/ ….

      12:33 PM - 4 Dec 2017
      0 replies 0 retweets 0 likes

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