FNINIT

X87_ALU X87 x86_64

2 encoding forms.

X86_FNINIT_X86_LEGACY_ONEBYTE_DB_0
(no syntax)
X86_LEGACY DB FPU
XED_FNINIT_X86_LEGACY_ONEBYTE_DB_583945
REG0=XED_REG_X87CONTROL:w:SUPP REG1=XED_REG_X87TAG:w:SUPP REG2=XED_REG_X87STATUS:w:SUPP
X86_LEGACY DB /4 X87