Unable to process instruction "pcmpistri"

[japroc]

Hello, i am trying to process the next instruction: pcmpistri xmm0, xmmword ptr [eax-10h], 0Ch. opcode: \x66\x0F\x3A\x63\x40\xF0\x0C.
ctx.disassembly(inst) successfully disassemle it. But ctx.processing(inst) fails and returns False.
What can i do with it?
I thought about emulate this instruction by own python code and update tainted memory and registers, but this instruction looks pretty complicated too emulate it correctly.