FCOMP

X87_ALU X87 x86_64

6 encoding forms.

X86_FCOMP_X86_LEGACY_ONEBYTE_D8_0
(no syntax)
X86_LEGACY D8 FPU
X86_FCOMP_X86_LEGACY_ONEBYTE_D8_10310
st(i)
X86_LEGACY D8 FPU
XED_FCOMP_ST0_X87_DCD1 FCOMP_ST0_X87_DED0
REG0=XED_REG_ST0:r:IMPL:f80 REG1=X87():r:f80 REG2=XED_REG_X87POP:r:SUPP REG3=XED_REG_X87STATUS:w:SUPP REG0=XED_REG_ST0:r:IMPL:f80 REG1=X87():r:f80 REG2=XED_REG_X87POP:r:SUPP REG3=XED_REG_X87STATUS:w:SUPP
X86_LEGACY DC DE /2 X87
XED_FCOMP_X86_LEGACY_ONEBYTE_D8_173042
REG0=XED_REG_ST0:r:IMPL:f80 REG1=X87():r:f80 REG2=XED_REG_X87POP:r:SUPP REG3=XED_REG_X87STATUS:w:SUPP
X86_LEGACY D8 /3 X87
XED_FCOMP_X86_LEGACY_ONEBYTE_D8_726281
REG0=XED_REG_ST0:r:IMPL:f80 MEM0:r:mem32real REG1=XED_REG_X87POP:r:SUPP REG2=XED_REG_X87STATUS:w:SUPP
X86_LEGACY D8 /3 X87
XED_FCOMP_X86_LEGACY_ONEBYTE_DC_295839
REG0=XED_REG_ST0:r:IMPL:f80 MEM0:r:m64real REG1=XED_REG_X87POP:r:SUPP REG2=XED_REG_X87STATUS:w:SUPP
X86_LEGACY DC /3 X87