[Buildroot] FFTW optimized for ARM and NEON FPU

Peter Kümmel syntheticpp at gmx.net
Tue Feb 24 09:44:40 UTC 2015


+FFTW_CONF_OPTS+= ARM_FLOAT_ABI=softfp

Shouldn't it use hardfp?
https://wiki.debian.org/ArmHardFloatPort/VfpComparison

Am 24.02.2015 um 04:57 schrieb guillaume william brs:
> Hello,
>
> I am working on a cortex-a9 (zynq SoC, mainly zc706)
> I faced fairly slow computations of FFT using this library
> with the default configuration (20MFlops).
>
> I modified package/fftw.mk to optimize the library
> compilation as long as an FPU is available,
> NEON in this case: this increased the number of MFlops to
> 500-600.
>
>
>
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