[Libre-soc-isa] [Bug 1074] create twin-butterfly research page into DCT/FFT instructions

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Sat Apr 29 17:47:57 BST 2023


--- Comment #15 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
holy cow you're right.  this ends up as one instruction. wow.

    add 9,5,4
    subf 5,5,4
    mullw 9,9,6
    mullw 5,5,6
    addi 9,9,8192
    addi 5,5,8192
    srawi 9,9,14
    srawi 5,5,14

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