Re: [Patch-gnuradio] Add possibility to disable NEON optimisation on ARM

[Philip Balister]

On 07/13/2012 11:10 AM, Jaroslav Skarvada wrote:
> Hi,
>
> the NEON optimisation is always used on all ARMs, even if not
> supported. Another problem is that in Fedora we build with
> -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard, so
> the compilation fails even on machine with NEON.
>
> The proposed patch adds guard to NEON assembly code and the guard
> depends on have_mfpu_neon cmake internal variable. The value of
> this variable is autodetected during cmake initialisation, but
> can be also overriden by e.g.:


Do you know if this works for cross compiling? I assume it can be forced 
on regardless?

Philip

> cmake -Dhave_mfpu_neon=0
>
> The performance/usability of binary compiled without NEON is
> probably not good, but at least it compiles fine on more
> machines.
>
> This issue was originally reported in:
> https://bugzilla.redhat.com/show_bug.cgi?id=837028
>
> regards
>
> Jaroslav
>
>
>
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