On Wed, 2019-01-23 at 23:53 +0100, Jakub Jelinek wrote:
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>
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> On Wed, Jan 23, 2019 at 09:56:21PM +0000, Steve Ellcey wrote:
> > I wonder if we even need to pass a string to the target
> > hook. Instead
> > of:
> >
> > !GCC$ builtin (cos) attributes simd (notinbranch) if('x86_64-linux-gnu')
> >
> > We just have:
> >
> > !GCC$ builtin (cos) attributes simd (notinbranch) if_allowed
>
> That is not possible. The whole point why we have a header is that glibc
> as the library provider provides a header which says to gcc which builtins
> have simd entrypoints, for which target and for which multilib.
>
> If GCC knew or wanted to hardcode that info, we wouldn't have a header, we'd
> just hardcode it.
> The point is that at some later point, glibc might get an implementation for
> say powerpc64 64-bit, or mips n32, or whatever else, say for a subset of the
> builtins x86_64 has, or superset, ...
Duh. Of course. I am not sure how I lost track of that fact.
Steve Ellcey
sell...@marvell.com
