RFR: 8249893: AARCH64: optimize the construction of the value from the bits of the other two

[Andrew Haley]

On 05/10/2020 18:40, Boris Ulasevich wrote:
> Let me revive the change request to C2 and AArch64 that applies Bitfield Insert instruction in the expression "(v1 &
> 0xFF) | ((v2 & 0xFF) << 8)".
>   
> Compared to the last round of review [2] I updated the transformation to apply BFI in more cases and added a jtreg test.

I looked through the dicussion and I can't find an updated benchmark which
shows the speedup for the cases you now handle. Is there one?

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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