Agner`s CPU blog

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Stop the instruction set war
Author:  Date: 2010-01-09 13:01
The x87 instruction set won't truly be obsolete until SSEx has support for floating-point formats of >64 bits. As it is, using those old instructions is a good way to get some extra precision (which can be quite valuable: rather than having to analyze a program in detail to see whether it is numerically stable, one can just re-run it with higher precision and see if the results change much.)
 
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