FINCSTP

X87_ALU X87 x86_64

2 encoding forms.

X86_FINCSTP_X86_LEGACY_ONEBYTE_D9_0
(no syntax)
X86_LEGACY D9 FPU
XED_FINCSTP_X86_LEGACY_ONEBYTE_D9_430584
REG0=XED_REG_X87STATUS:rw:SUPP
X86_LEGACY D9 /6 X87