"H.J. Lu" <hjl.to...@gmail.com> wrote: >On Wed, Jul 24, 2013 at 8:23 AM, Richard Biener ><richard.guent...@gmail.com> wrote: >> "H.J. Lu" <hjl.to...@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. Richard. >-- >H.J.
