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Re: [PATCH], Use VMRGEW on PowerPC power8/power9 to construct V4SFmode

On Mon, Sep 19, 2016 at 06:51:42PM -0400, Michael Meissner wrote:
> > > However ISA 2.07 (i.e. power8) added the VMRGEW instruction, which can do this
> > > more simply:
> > > 
> > >         xxpermdi 34,1,2,0
> > >         xxpermdi 32,3,4,0
> > >         xvcvdpsp 34,34
> > >         xvcvdpsp 32,32
> > >         vmrgew 2,2,0
> > 
> > This results in {a,c,b,d} instead?
> 
> Yes.

[ snip ]

My question was if you typoed/pastoed/thinkoed it here and you meant

        xxpermdi 34,1,3,0
        xxpermdi 32,2,4,0
        xvcvdpsp 34,34
        xvcvdpsp 32,32
        vmrgew 2,2,0

which a) works, and b) seems to be what the code generates :-)


Segher
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