[MPlayer-dev-eng] [PATCH] NetBSD sparc64 and vis

[Dominik 'Rathann' Mierzejewski]

On Sunday, 26 August 2007 at 13:01, Reimar Döffinger wrote:
> Hello,
> On Sun, Aug 26, 2007 at 01:34:09PM +0300, Jan Knutar wrote:
> [...]
> > Attached is a patch that makes configure check the output of sysctl 
> > hw.model on netbsd sparc64, and if 'UltraSPARC' is found there, vis is 
> > enabled and -mcpu=ultrasparc is set. Vis is disabled if running on 
> > non-ultrasparc sparc64.

> Do they exist?

> > Interestingly the Solaris-specific
> > code in configure disables VIS on sun4v (T1 aka Niagara?).

That's because T1 doesn't support most of VIS:

http://opensparc-t1.sunsource.net/specs/UST1-UASuppl-current-draft-P-EXT.pdf
[...]
5.4 VIS Instructions

UltraSPARC T1 supports in hardware the VIS 2 SIAM instruction and a subset
of the VIS 1 instructions.
All other VIS 1 and VIS 2 instructions (see TABLE 5-2 for a list) cause an
illegal_instruction exception on UltraSPARC T1 and are emulated in software.
[...]

> And isn't there a simpler and especially more portable
> way of detecting them? (actually it is stupid enough that the normal
> sparc detection only works for sunos).

I don't know. Looking through /proc on sun4u running Linux doesn't reveal
anything VIS-related.

Regards,
R.

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