On Tue, 27 Nov 2001, matthew green wrote:

>
>    	I believe sparc64 automatically sets -mcpu=v9. For other boxes
>    	you might want to look at the devel/cpuflags package. It takes
>    	a look at sysctl hw.model and tries to pick a good set of
>    	optimisation flags. If you find any CPU values it doesn't
>    	recognise, please let me know :)
>
>    	-msupersparc gets you the int multiply and divide which should
>    	be a win :)
>
>
> it seems to me that the default sparc64 flags should include -multrasparc
> to properly enable scheduling for ultrasparc.  "sparc" needs to run on
> both v7 and v8 hardware (no v6 that i'm aware of??) and the int mul/div
> instructions take a Long Time to emulate on the v7 machines, so you don't
> want to default to -mv8 or -msupersparc.
>
>
> sparc64 doesn't set -mcpu=v9.  the 64bit compiler defaults to 64bit,
> but that's separate (-m32 vs -m64).

	Sorry - I must have misunderstood something eeh mentioned a while back.
	As it happens cpuflags will explicityly set -cpu=v9 for ultrasparc
	machines :)

-- 
		David/absolute		-- www.netbsd.org: No hype required --