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

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1074

--- Comment #8 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---

https://git.libre-soc.org/?p=libreriscv.git;a=commitdiff;h=9094d03d96dc474267c587fc94b8b5fdc8244227


+    res1 <- ROTL64(prod1, XLEN-SH)
+    res2 <- ROTL64(prod2, XLEN-SH)

ha, excellent.

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