[SunRescue] help a guy run 2.6 on his 670MP

Gregory Leblanc rescue at sunhelp.org
Wed May 16 15:45:38 CDT 2001


On 16 May 2001 13:38:12 -0700, James Lockwood wrote:
> On Wed, 16 May 2001, Dave McGuire wrote:
> 
> >   It's what MMX should have been.  It's very impressive.  I still
> 
> Right.  One of my favorite things about VIS is how flexible it is.  You
> can do cool things like using fpmerge to double 8-bit data:
> 
>         membar  #StoreLoad
>         ldda    [%o0]0xF0,%f0
>         fpmerge %f0,%f0,%f16
>         fpmerge %f1,%f1,%f18
>         fpmerge %f2,%f2,%f20
>         fpmerge %f3,%f3,%f22
>         fpmerge %f4,%f4,%f24
>         fpmerge %f5,%f5,%f26
>         fpmerge %f6,%f6,%f28
>         fpmerge %f7,%f7,%f30
>         stda    %f16,[%o1]0xF0
>         membar  #StoreLoad
> 
> Naturally you'd want to overlap your ldda/stda's and unroll a loop around
> this to keep the memory bus flowing at the same time as the FP units.

Out of curiosity, is this completely opaque to anybody else?  :)
    Greg




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