[Libre-soc-bugs] [Bug 995] align SVP64 instructions

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Mon Jan 23 21:32:29 GMT 2023


Luke Kenneth Casson Leighton <lkcl at lkcl.net> changed:

           What    |Removed                     |Added
                 CC|                            |lkcl at lkcl.net

--- Comment #2 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Dmitry Selyutin from comment #1)
> https://libre-soc.org/irclog/%23libre-soc.2023-01-23.log.html#t2023-01-23T19:
> 49:50
> OpenPOWER ISA 1.6 Instruction Formats
> Prefixed instructions do not cross 64-byte instruction
> address boundaries. When a prefixed instruction
> crosses a 64-byte boundary, the system alignment
> error handler is invoked.

that's Power ISA 3.1 EXT001 64-bit prefixed instructions.

SVP64 will not be fitting into EXT001 (we know that. current
alternatives include EXT009) and consequently alignment of
EXT001 is not relevant.

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