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RE: Vector modes and the corresponding width integer mode


I don't think it is required. For example, PowerPC port supports 
V8SImode, but I don't see OImode. Just sometimes it could come handy to
have the equal size scalar mode.

Cheers,
Bingfeng

> -----Original Message-----
> From: gcc-owner@gcc.gnu.org [mailto:gcc-owner@gcc.gnu.org] On Behalf Of
> Matthew Fortune
> Sent: 11 December 2014 13:27
> To: gcc@gcc.gnu.org
> Subject: Vector modes and the corresponding width integer mode
> 
> Hi,
> 
> I'm working on MIPS SIMD support for MSA. Can anyone point me towards
> information about the need for an integer mode of equal size to any
> supported vector mode?
> 
> I.e. if I support V4SImode is there any core GCC requirement that
> TImode is also supported?
> 
> Any guidance is appreciated. The MIPS port already has limited support
> for TImode for 64-bit targets which makes it all the more difficult to
> figure out if there is a relationship between vector modes and integer
> modes.
> 
> Thanks,
> Matthew


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