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RE: Vector modes and the corresponding width integer mode
- From: Bingfeng Mei <bmei at broadcom dot com>
- To: Matthew Fortune <Matthew dot Fortune at imgtec dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Fri, 12 Dec 2014 11:51:32 +0000
- Subject: RE: Vector modes and the corresponding width integer mode
- Authentication-results: sourceware.org; auth=none
- References: <6D39441BF12EF246A7ABCE6654B0235320F84DFC at LEMAIL01 dot le dot imgtec dot org>
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.
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of
> Matthew Fortune
> Sent: 11 December 2014 13:27
> To: firstname.lastname@example.org
> Subject: Vector modes and the corresponding width integer mode
> 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