[musl] Re: ppc64le and 32-bit LE userland compatibility

Jeffrey Walton noloader@gmail.com
Tue Jun 2 02:09:38 GMT 2020

On Mon, Jun 1, 2020 at 9:58 PM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
> On Tue, Jun 02, 2020 at 01:26:37AM +0200, Daniel Kolesa wrote:
> > On Mon, Jun 1, 2020, at 23:28, Joseph Myers wrote:
> > Are you sure this would be a new port? Glibc already works in this combination, as it seems to me it'd be best if it was just a variant of the existing 32-bit PowerPC port, sharing most conventions besides endianness with the BE port.
> That's right.  Except it isn't an "official" existing port, never has
> been "officially" supported.
> > 128-bit IEEE long double would not work, since that relies on VSX being present (gcc will explicitly complain if it's not). I'd be all for using 64-bit long double, though (musl already does, on all ppc ports).
> The current IEEE QP float support requires VSX for its emulation, yes
> (possibly even Power8?) ...

I believe Steven Munroe has an implementation that includes emulation
for lesser POWER architectures at
https://github.com/munroesj52/pveclib. If I am not mistaken, Munroe 's
library supports back to POWER7.

Modern GCC is fine. Clang has problems because it lacks support for
ISO/IEC TS 18661 or N2341


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