Intel 253666-024US User Manual

Page 616

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3-570 Vol. 2A

MASKMOVQ—Store Selected Bytes of Quadword

INSTRUCTION SET REFERENCE, A-M

#MF

If there is a pending FPU exception.

#UD

If CR0.EM[bit 2] = 1.
If CR4.OSFXSR[bit 9] = 0.
If CPUID.01H:EDX.SSE[bit 25] = 0.
If the LOCK prefix is used.

Virtual-8086 Mode Exceptions

Same exceptions as in real address mode.
#PF(fault-code)

For a page fault (implementation specific).

#AC(0)

If alignment checking is enabled and an unaligned memory

reference is made.

Compatibility Mode Exceptions

Same exceptions as in protected mode.

64-Bit Mode Exceptions

#GP(0)

If the memory address is in a non-canonical form.

#SS(0)

If a memory address referencing the SS segment is in a non-

canonical form.

#PF(fault-code)

For a page fault (implementation specific).

#NM

If CR0.TS[bit 3] = 1.

#MF

If there is a pending FPU exception.

#UD

If CR0.EM[bit 2] = 1.
If CR4.OSFXSR[bit 9] = 0.
If CPUID.01H:EDX.SSE[bit 25] = 0.
If Mod field of the ModR/M byte not 11B.
If the LOCK prefix is used.

#AC(0)

If alignment checking is enabled and an unaligned memory

reference is made while the current privilege level is 3.

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