3 ms·

Can we actually compute without branching? Genuine question. What architecture would do that, and how?

• pcwalton 7y ago
  Old GPUs did that. It wasn't very pleasant to program with. :)
• gmueckl 7y ago
  The simplified SIMD cores in early GPUs had to fake branching to some extent for their virtual threads: every branch in the shader code would be tested for each virtual flag and that thread (really just a vector component) would be masked out for the instructions of the branch that didn't apply. The GPU would run both branches, relying on the mask. It was workable, but very slow.
• nwallin 7y ago
  You can compute with less than that. (all links are to the same thing) https://github.com/xoreaxeaxeax/movfuscator https://github.com/xoreaxeaxeax/movfuscator https://m.youtube.com/watch?v=R7EEoWg6Ekk https://m.youtube.com/watch?v=R7EEoWg6Ekk https://news.ycombinator.com/item?id=18991404 https://news.ycombinator.com/item?id=18991404
  • deleted 7y ago
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