[PATCH] AArch64: Implement big endian bit-conversion for NEON types

James Molloy James.Molloy at arm.com
Thu Apr 24 07:35:24 PDT 2014


Hi Christian,

But your patch *does* implement vector-to-vector conversions. Just for 128-bit vectors. Line 6600 to line 6634.

A vector-to-vector bitcast can exist in IR. Use cases for that aren't important - it's allowed and should be handled.

Cheers,

James

> -----Original Message-----
> From: Christian Pirker [mailto:cpirker at a-bix.com]
> Sent: 24 April 2014 15:32
> To: cpirker at a-bix.com
> Cc: James Molloy; Amara Emerson; llvm-commits at cs.uiuc.edu
> Subject: Re: [PATCH] AArch64: Implement big endian bit-conversion for
> NEON types
>
> Hi James,
>
> the patch implements and tests both 64 and 128 vector-to-scalar (and vice
> versa).
> I don't see any meaningful usage of vector-to-vector conversion using rev
> instructions.
> Would you be able to provide a use case?
>
> Thanks,
> Christian
>
> http://reviews.llvm.org/D3424
>
>


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