[Libre-soc-isa] [Bug 933] prefix-code (like huffman code) decode/encode instructions

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Wed Sep 21 21:59:14 BST 2022


--- Comment #2 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
ooo, i like it, and it's exactly the kind of fascinating thing
that "emerges" like this.

1. practical detail: 4-operand is barely enough room to fit, takes up
   26 bits on its own, is a 5/6-bit XO. if the imm is 1 bit that's 2of
   5-bit XOs. costly! has to be *really* worth it which...

2. ... are there any other uses? other common compression algorithms?

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