vector operations and scalar operands
Jan Hubicka
jh@suse.cz
Sun Feb 9 22:56:00 GMT 2003
> On Sun, Feb 09, 2003 at 03:46:19PM +0100, Jan Hubicka wrote:
> > Hi,
> > the pattern:
> > [(set (match_operand:V4HI 0 "register_operand" "=y")
> > (ashiftrt:V4HI (match_operand:V4HI 1 "register_operand" "0")
> > (match_operand:DI 2 "nonmemory_operand" "yi")))]
> > won't get simplified by my code as it expect vectors in all operands.
> > Some other places of i386.md does this with vectors:
> >
> > (define_insn "mmx_uavgv4hi3"
> > [(set (match_operand:V4HI 0 "register_operand" "=y")
> > (ashiftrt:V4HI
> > (plus:V4HI (plus:V4HI
> > (match_operand:V4HI 1 "register_operand" "0")
> > (match_operand:V4HI 2 "nonimmediate_operand" "ym"))
> > (const_vector:V4HI [(const_int 1)
> > (const_int 1)
> > (const_int 1)
> > (const_int 1)]))
> > (const_int 1)))]
>
> Huh? Both of these cases use a scalar as the rhs of a shift.
Hmm, I've missread the pattern.
> I think that makes sense.
Agreed. I will teach simplify_rtx about this.
Honza
>
>
> r~
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