Intel 253666-024US User Manual

Page 275

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Vol. 2A 3-229

INSTRUCTION SET REFERENCE, A-M

CVTSI2SS—Convert Doubleword Integer to Scalar Single-Precision Floating-Point Value

SIMD Floating-Point Exceptions

Precision.

Protected Mode Exceptions

#GP(0)

For an illegal memory operand effective address in the CS, DS,

ES, FS or GS segments.

#SS(0)

For an illegal address in the SS segment.

#PF(fault-code)

For a page fault.

#NM

If CR0.TS[bit 3] = 1.

#XM

If an unmasked SIMD floating-point exception and CR4.OSXM-

MEXCPT[bit 10] = 1.

#UD

If an unmasked SIMD floating-point exception and CR4.OSXM-

MEXCPT[bit 10] = 0.

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.

#AC(0)

If alignment checking is enabled and an unaligned memory

reference is made while the current privilege level is 3.

Real-Address Mode Exceptions

GP(0)

If any part of the operand lies outside the effective address

space from 0 to FFFFH.

#NM

If CR0.TS[bit 3] = 1.

#XM

If an unmasked SIMD floating-point exception and CR4.OSXM-

MEXCPT[bit 10] = 1.

#UD

If an unmasked SIMD floating-point exception and CR4.OSXM-

MEXCPT[bit 10] = 0.

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.

#AC(0)

If alignment checking is enabled and an unaligned memory

reference is made.

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