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Intel 253666-024US User Manual

Page 456

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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.

See also other documents in the category Intel Hardware: