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In some cases, FPUs may be specialized, and divided between simpler floating-point operations (mainly addition and multiplication) and more complicated operations, like division. In some cases, only the simple operations may be implemented in hardware or [[microcode]], while the more complex operations are implemented as software.
In some current architectures, the FPU functionality is combined with SIMD units to perform [[SIMD]] computation; an example of this is the augmentation of the [[x87]] instructions set with [[Streaming SIMD Extensions|SSE]] instruction set in the [[x86-64]] architecture used in newer Intel and AMD processors.
== Add-on FPUs ==
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