Re: Adding more ppc64 buildds from the POWER cloud
On 04/05/2016 10:51 AM, Gabriel Paubert wrote:
> What is really missing in ppc-land is a variant which uses 32 bit
> addresses but otherwise knows that general purposes registers are
> 64 bit wide and can be used as such, i.e., an alternative 32 bit ABI
> which can only run on 64 bit processors and use 64 bit instructions
> when beneficial while not needing over 4GB of address space.
> (Truth be said, PPC code density is not great but much worse in
> 64 bit mode than in 32 bit mode).
>
> I don't know for sure, but MIPS and/or Sparc may have something along
> these lines.
Yeah, that's basically how Debian's sparc port worked. It used the
V9 instruction set which is normally 64 bits but with 32 bit pointers.
However, that port was now dropped since upstream is now more focussing
on sparc64. Oracle's new reference implementation "Linux for SPARC"
is fully 64 bits.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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