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Date: Fri, 9 Jun 2023 09:42:38 +0100
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Subject: Re: [PATCH] Add COMPLEX_VECTOR_INT modes
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To: Richard Biener <richard.guenther@gmail.com>, "gcc-patches@gcc.gnu.org"
	<gcc-patches@gcc.gnu.org>, <richard.sandiford@arm.com>
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From: Andrew Stubbs <ams@codesourcery.com>
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On 07/06/2023 20:42, Richard Sandiford wrote:
> I don't know if this helps (probably not), but we have a similar
> situation on AArch64: a 64-bit mode like V8QI can be doubled to a
> 128-bit vector or to a pair of 64-bit vectors.  We used V16QI for
> the former and "V2x8QI" for the latter.  V2x8QI is forced to come
> after V16QI in the mode list, and so it is only ever used through
> explicit choice.  But both modes are functionally vectors of 16 QIs.

OK, that's interesting, but how do you map "complex int" vectors to that 
mode? I tried to figure it out, but there's no DIVMOD support so I 
couldn't just do a straight comparison.

Thanks

Andrew