RFR: 8248238: Implementation of JEP: Windows AArch64 Support [v10]

[Andrew Haley]

On 28/09/2020 20:12, Bernhard Urban-Forster wrote:
> The idea is that the naming should suggest that `r18` shouldn't be used on that particular platform. Same is true for
> macOS, but the ABI docs suggest a different usage, hence we have something like that in our internal branch for macOS:
> Suggestion:
>
>     "r17", NOT_R18_RESERVED("r18") WIN64_ONLY("rtls") MACOS_ONLY("rplatform"), "r19",
> Are you suggesting it should rather be something like this eventually?
> Suggestion:
>
>     "r17", LINUX_ONLY("r18") WIN64_ONLY("rtls") MACOS_ONLY("rplatform"), "r19",

This is wrong. We can't use the register in Linux either, except in
Linux-specific code of which there is almost none. It's also a
pointless complication. r18 should be called r18_tls everywhere, as
discussed.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671