Intel U1300 LE80538UE0042M Data Sheet

Specification Update  

 19

 

If execution of an FST (Store Floating Point Value) instruction would generate both 

numeric and Null segment exceptions, the numeric exceptions may be taken first and 

with the Null x87 FPU Instruction Operand (Data) Pointer. 

Implication:  Due to this erratum, on an FST instruction the processor reports a numeric exception 

instead of reporting an exception because of a Null segment. If the numeric exception 

handler tries to access the FST data it will get a #GP fault. Intel has not observed this 

erratum with any commercially-available software, or system. 

Workaround: The numeric exception handler should check the segment, and if it is Null, avoid 

further access to the data that caused the fault. 

For the steppings affected, see the 

Summary Tables of Changes

.  

Code Segment limit violation may occur on 4-Gbyte limit check when the code stream 

wraps around in a way that one instruction ends at the last byte of the segment and 

the next instruction begins at 0x0. 

Implication:  This is a rare condition that may result in a system hang. Intel has not observed this 

erratum with any commercially-available software, or system. 

Workaround: Avoid code that wraps around segment limit. 

For the steppings affected, see the 

Summary Tables of Changes

.