Keystone Not Assembling Powerpc

[elbee-cyber]

It seems that keystone is not assembling basically any powerpc64 instruction (beyond nops and some instructions which do not read/write memory including registers)
eg:

md = Ks(KS_ARCH_PPC, KS_MODE_PPC64 | KS_MODE_BIG_ENDIAN)
print(md.asm(bytes("ld r0,16(r1)", 'utf8'), as_bytes=True))
print(md.asm(bytes("addi r10,r2,235", 'utf8'), as_bytes=True))
print(md.asm(bytes("xori r9,r9,65280", 'utf8'), as_bytes=True))

All instructions result in an Invalid operand (KS_ERR_ASM_INVALIDOPERAND)

I've also noticed this issue in virtually every tool that uses keystone, here's another example from gdb-gef:

I've noticed the same issue for ppc32:

[TheN00bBuilder]

Have this issue as well. This is something new as well because less than a year ago, I was able to use it to assemble PowerPC.

I'm going to attempt to make a patch for it soon, once I diagnose the issue.