Intel 64 and IA-32 Architectures Software Developers Manual Volume 2A, Instruction Set Reference, A-M

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Vol. 2 3-331

INSTRUCTION SET REFERENCE, A-M

Operation

FPUControlWord ← 037FH;

FPUStatusWord ← 0;

FPUTagWord ← FFFFH;

FPUDataPointer ← 0;

FPUInstructionPointer ← 0;

FPULastInstructionOpcode ← 0;

FPU Flags Affected

C0, C1, C2, C3 set to 0.

Floating-Point Exceptions

None.

Protected Mode Exceptions

#NM CR0.EM[bit 2] or CR0.TS[bit 3] = 1.

#MF If there is a pending x87 FPU exception.

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.