[x86-64 psABI]: Extend x86-64 psABI to support AVX-512

[H.J. Lu]

On Wed, Jul 24, 2013 at 10:36 AM, Richard Biener
<richard.guenther@gmail.com> wrote:
> "H.J. Lu" <hjl.tools@gmail.com> wrote:
>
>>On Wed, Jul 24, 2013 at 8:23 AM, Richard Biener
>><richard.guenther@gmail.com> wrote:
>>> "H.J. Lu" <hjl.tools@gmail.com> wrote:
>>>
>>>>Hi,
>>>>
>>>>Here is a patch to extend x86-64 psABI to support AVX-512:
>>>
>>> Afaik avx 512 doubles the amount of xmm registers. Can we get them
>>callee saved please?
>>>
>>
>>Make them callee saved means we need to change ld.so to
>>preserve them and we need to change unwind library to
>>support them.  It is certainly doable.
>
> IMHO it was a mistake to not have any callee saved xmm register in the original abi - we should fix this at this opportunity. Loops with function calls are not that uncommon.
>

Are there any other Linux targets with callee saved vector registers?


--
H.J.