Intel 253666-024US - Manual (Page 456)

3-410 Vol. 2A FUCOM/FUCOMP/FUCOMPP—Unordered Compare Floating Point Values
INSTRUCTION SET REFERENCE, A-M
#IA One or both operands are SNaN values or have unsupported
formats. Detection of a QNaN value in and of itself does not raise
an invalid-operand exception.
#D One or both operands are denormal values.
Protected Mode Exceptions
#NM CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
#MF If there is a pending x87 FPU exception.
#UD If the LOCK prefix is used.
Real-Address Mode Exceptions
Same exceptions as in protected mode.
Virtual-8086 Mode Exceptions
Same exceptions as in protected mode.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
Same exceptions as in protected mode.