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1. Anatoly Shashkin💾 (dosnostalgic@mastodon.social@mastodon.social)'s status on Thursday, 07-Sep-2023 19:29:12 UTC Anatoly Shashkin💾

   A branchless port of DOOM that only uses MOV instruction. Takes 7 hours to render each frame.
   https://github.com/xoreaxeaxeax/movfuscator/blob/master/validation/doom/README.md

   • mausmalone (mausmalone@mastodon.social)'s status on Thursday, 07-Sep-2023 19:44:15 UTC mausmalone

     in reply to

     @dosnostalgic but but but assembly code is always faster!

   • Brian Gomes Bascoy (pera) (trobador@mastodon.social)'s status on Sunday, 10-Sep-2023 12:50:58 UTC Brian Gomes Bascoy (pera)

     in reply to

     @dosnostalgic this is very cool! The cited paper ("mov is Turing-complete" by Stephen Dolan) explains how this works, the fundamental part is that you can perform comparisons with just mov instructions by storing a value X in [RegA], then a different value Y in [RegB], and finally load [RegA] into RegC: register C will now be Y if registers A and B are equal, otherwise it will be X.

     I don't recall reading about this topic before, it's really ingenious: https://en.m.wikipedia.org/wiki/One-instruction_set_computer#Transport_triggered_architecture