Intel I5 Bedienungsanleitung Seite 46

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46 Specification Update
BU89. VEX.L is Not Ignored with VCVT*2SI Instructions
Problem: The VEX.L bit should be ignored for the VCVTSS2SI, VCVTSD2SI, VCVTTSS2SI, and
VCVTTSD2SI instructions, however due to this erratum the VEX.L bit is not ignored and
will cause a #UD.
Implication: Unexpected #UDs will be seen when the VEX.L bit is set to 1 with VCVTSS2SI,
VCVTSD2SI, VCVTTSS2SI, and VCVTTSD2SI instructions.
Workaround: Software should ensure that the VEX.L bit is set to 0 for all scalar instructions.
Status: For the steppings affected, see the Summary Tables of Changes
BU90. Intel
®
Turbo Boost Technology May be Incorrectly Reported as
Supported on Intel
®
Core™ i3-3217U
Problem: The Intel
®
Core™ i3-3217U processor may incorrectly report support for Intel
®
Turbo
Boost Technology via CPUID.06H.EAX bit 1.
Implication: The CPUID instruction may report Turbo Boost Technology as supported even though
the processor does not permit operation above the Maximum Non-Turbo Frequency.
Workaround: None identified
Status: For the steppings affected, see the Summary Tables of Changes
BU91. Concurrently Changing the Memory Type and Page Size May Lead to a
System Hang
Problem: Under a complex set of microarchitectural conditions, the system may hang if software
changes the memory type and page size used to translate a linear address while a TLB
(Translation Lookaside Buffer) holds a valid translation for that linear address.
Implication: Due to this erratum, the system may hang. Intel has not observed this erratum with
any commercially available
software.
Workaround: None identified. Please refer to Software Developer’s Manual, volume 3, section
“Recommended Invalidation” for the proper procedure for concurrently changing page
attributes and page size.
Status: For the steppings affected, see the Summary Tables of Changes.
BU92. MCI_ADDR May be Incorrect For Cache Parity Errors
Problem: In cases when a WBINVD instruction evicts a line containing an address or data parity
error (MCACOD of 0x124, and MSCOD of 0x10), the address of this error should be
logged in the MCi_ADDR register.
Due to this erratum, the logged address may be
incorrect, even though MCi_Status.ADDRV (bit 63) is set.
Implication: The address reported in MCi_ADDR may not be correct for cases of a parity error found
during WBINVD execution.
Workaround: None identified.
Status: For the steppings affected, see the Summary Tables of Changes.
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