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Home » Dictionary » CPU

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

SIMD
Author: Gabriel Torres Last Updated: December 29, 2005
Category: CPU

Single Instruction, Multiple Data

SIMD is a type of instruction capable of processing several data chunks at once. For example, using a 32-bit register to load and execute four eight-bit data at the same time. In this example, this task would be four times faster than manipulating the four eight-bit data individually.

There are several implementations for SIMD technology, like MMX, SSE and 3Dnow.

To use this technology, the processor must have a SIMD instruction set and the program must be compiled (i.e. written) using it in order to have a performance gain.

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