Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1419

FCOMI/FCOMIP/ FUCOMI/FUCOMIP—Compare Real and Set EFLAGS
(Continued)
Floating-point Exceptions
#IS
#IA
Protected Mode Exceptions
#NM
Real Address Mode Exceptions
#NM
Virtual 8086 Mode Exceptions
#NM
Volume 4: Base IA-32 Instruction Reference
Stack underflow occurred.
(FCOMI or FCOMIP instruction) One or both operands are NaN values
or have unsupported formats.
(FUCOMI or FUCOMIP instruction) One or both operands are SNaN
values (but not QNaNs) or have undefined formats. Detection of a
QNaN value does not raise an invalid-operand exception.
EM or TS in CR0 is set.
EM or TS in CR0 is set.
EM or TS in CR0 is set./
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