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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. Aliaksei Chapyzhenka‏ @wavedrom 31 Dec 2016
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      @oe1cxw @folknology Any ideas on the good #ice40 compression method with compact decompression library for ARM host?

      3 replies 0 retweets 1 like
    2. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 31 Dec 2016
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      Replying to @wavedrom @folknology

      Simple experiment with huffman coded RLE for zero bits: http://svn.clifford.at/handicraft/2016/ice40compr/ …pic.twitter.com/uJ0SmnAosG

      2 replies 0 retweets 3 likes
    3. Al‏ @folknology 1 Jan 2017
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      Replying to @oe1cxw @wavedrom

      what percentage of gates were used?

      2 replies 0 retweets 1 like
    4. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 1 Jan 2017
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      Replying to @folknology @wavedrom

      This example is an approximately half-full (hx8k) FPGA:pic.twitter.com/xUlcbYmU1o

      1 reply 1 retweet 4 likes
    5. Al‏ @folknology 1 Jan 2017
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      Replying to @oe1cxw @wavedrom

      That shows (predictably) the limitations of RLE quite clearly, maybe other methods can improve with higher gate counts..

      1 reply 0 retweets 0 likes
    6. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 1 Jan 2017
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      Replying to @folknology @wavedrom

      J1a is pretty much as tight as it gets (hx1k). Still 33% space savings. ("gzip -9" achieves 42% space savings.)pic.twitter.com/7rTHUssgT7

      2 replies 0 retweets 3 likes
    7. Aliaksei Chapyzhenka‏ @wavedrom 1 Jan 2017
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      Replying to @oe1cxw @folknology

      I think some form of RLE is a good start. 33% vs 42% gzip -9 is impressive. What 7Z /RAR gives you on J1a bitstream?

      1 reply 0 retweets 1 like
    8. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 1 Jan 2017
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      Replying to @wavedrom @folknology

      you can try it yourself. I checked in the example .bin files: http://svn.clifford.at/handicraft/2016/ice40compr/ …

      1 reply 0 retweets 2 likes
    9. Aliaksei Chapyzhenka‏ @wavedrom 1 Jan 2017
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      Replying to @oe1cxw @folknology

      I guess, bitstream data is not byte aligned, is it?

      1 reply 0 retweets 0 likes
      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 1 Jan 2017
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      Replying to @wavedrom @folknology

      correct, it is not. (bitstream, not bytestream ;)

      10:24 AM - 1 Jan 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Aliaksei Chapyzhenka‏ @wavedrom 1 Jan 2017
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          Replying to @oe1cxw @folknology

          That is where most of byte oriented compression methods will struggle.

          2 replies 0 retweets 0 likes
        2. Vertigo‏ @SamuelAFalvoII 1 Jan 2017
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          Replying to @wavedrom @oe1cxw @folknology

          Note to self: if ever get opportunity to create open-source FPGA design, use BYTE-STREAMS. ;-D

          1 reply 0 retweets 0 likes
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