[AARCH64] Neon vld1_*_x3, vst1_*_x2 and vst1_*_x3 intrinsics

[James Greenhalgh]

On Fri, Apr 06, 2018 at 08:55:47PM +0100, Christophe Lyon wrote:
> Hi,
> 
> 2018-04-06 12:15 GMT+02:00 Sameera Deshpande <sameera.deshpande@linaro.org>:
> > Hi Christophe,
> >
> > Please find attached the updated patch with testcases.
> >
> > Ok for trunk?
> 
> Thanks for the update.
> 
> Since the new intrinsics are only available on aarch64, you want to
> prevent the tests from running on arm.
> Indeed gcc.target/aarch64/advsimd-intrinsics/ is shared between the two targets.
> There are several examples on how to do that in that directory.
> 
> I have also noticed that the tests fail at execution on aarch64_be.

I think this is important to fix. We don't want the big-endian target to have
failing implementations of the Neon intrinsics. What is the nature of the
failure?

>From what I can see, nothing in the patch prevents using these intrinsics
on big-endian, so either the intrinsics behaviour is wrong (we have a wrong
code bug), or the testcase expected behaviour is wrong.

I don't think disabling the test for big-endian is the right fix. We should
either fix the intrinsics, or fix the testcase.

Thanks,
James