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Re: [PATCH] Aarch64: Add simd exp/expf functions

On Wed, 2019-03-06 at 20:16 +0100, Florian Weimer wrote:

> * Steve Ellcey:
> 
> > On Wed, 2019-03-06 at 19:04 +0000, Szabolcs Nagy wrote:
> > > 
> > > this will need to detect support for
> > > __attribute__((aarch64_vector_pcs))
> > > (which will require gcc-9)
> > 
> > That seems easy enough to check for.
> 
> Can you add assembler trampolines, so that the compiler support
> becomes optional, at a performance cost?

Yuck.  I suppose this is possible, but I do not want to do it.
The whole reason for vector functions (and for the new vector ABI)
is performance so adding a slow path doesn't seem to me like it is
worthwhile.

Steve Ellcey
sellcey@marvell.com
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