FNOP

X87_ALU X87 x86_64

2 encoding forms.

X86_FNOP_X86_LEGACY_ONEBYTE_D9_0
(no syntax)
X86_LEGACY D9 FPU
XED_FNOP_X86_LEGACY_ONEBYTE_D9_201807
(no syntax)
X86_LEGACY D9 /2 X87