FUCOMPP

X87_ALU X87 x86_64

2 encoding forms.

X86_FUCOMPP_X86_LEGACY_ONEBYTE_DA_0
(no syntax)
X86_LEGACY DA FPU
XED_FUCOMPP_X86_LEGACY_ONEBYTE_DA_961918
REG0=XED_REG_ST0:r:SUPP:f80 REG1=XED_REG_ST1:r:SUPP:f80 REG2=XED_REG_X87POP2:rw:SUPP REG3=XED_REG_X87STATUS:rw:SUPP
X86_LEGACY DA /5 X87