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Re: [RFC][PATCH 0/2] aarch64: Add optimized ASIMD versions of sinf/cosf

On Tue, 13 Jun 2017, Adhemerval Zanella wrote:

> x86_64 does this trick using ifunc (sysdeps/x86_64/fpu/multiarch/e_pow-fma4.c
> for instance).

That's only relevant where you have architecture variants with and without 
fma (then you can have a generic source file, built with different options 
and using IFUNC).  For 32-bit ARM conditional fma availability is relevant 
(bug 15503 notes that we ought to use VFMA in the fma / fmaf functions in 
glibc, with IFUNCs where necessary), for AArch64 fma is always present.

-- 
Joseph S. Myers
joseph@codesourcery.com
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