Load Operation May Receive Incorrect Data After Floating-Point Exception - AMD 3200 - Athlon 64 2.0 GHz Processor Manual

Revision Guide for AMD Family
Load Operation May Receive Incorrect Data After Floating-
point Exception
Description
The processor may incorrectly load data from a prior store-to-load forwarding operation after an unmasked x
floating-point exception
prior exception is indicated x
Potential Effect on System
None expected Operating systems typically set CR NE
clear the exception status FSW ES If these conditions are not met a load operation may receive data that was
not updated by the most current write from a processor core AMD has not observed this erratum with any
commercially available software
Suggested Workaround
None
Fix Planned
Yes
h Models h- Fh Processors
MF if the exception occurs while CR Numeric Error
Status Word Register Exception Status FSW ES bit
Product Errata
b CR NE bit
b or floating-point exception handlers normally
Rev October
and a
is already b