The P1022 uses e500v2 series cores.
There are three revisions of the e500 cores: v1, v2 and mc.
v1 and v2 do not support the classical FPU, but the mc does.
https://en.wikipedia.org/wiki/PowerPC_e500Wikipedia states: "The P10xx series, P2010 and P2020 are based on the e500v2 core, P204x, P30xx and P40xx on the e500mc core, and P50xx on the e5500 core"
So choosing the P10xx, P201x or P202x would be a worse decision than picking P204x, P30xx, P40xx or P50xx (or even T1). Obviously the IEEE libraries will support things, but software compiled to hit the FPU directly is going to be trapping all over the place, until it's recompiled.
The I/O on a P3 series chip would appear to match the needs of a motherboard better - the 18 SERDES lines means more PCIe, SATA and GigE, whereas the P1022, once you've added 2 SATA, 1 GigE leaves 3 PCIe lanes.
These chips are OLD. We're talking about chips that were on the market five, six years ago. It seems strange to start using them on a new product.
