Difference between revisions of "SIMD"
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SIMD (Single Instruction, Multiple Data) is a set of operations for efficiently handling large amounts of data. It makes it possible to execute one command on a set of data instances instead of having the same command to be executed on each of the data instances. | SIMD (Single Instruction, Multiple Data) is a set of operations for efficiently handling large amounts of data. It makes it possible to execute one command on a set of data instances instead of having the same command to be executed on each of the data instances. | ||
| − | First introduced in large-scale supercomputers SIMD instrucion sets have become popular in personal computing hardware, hence being mostly associated with these units. The most widely known SIMD instructions sets are AIMs (Apple-IBM-Motorola) AltiVec for the PowerPC, AMDs 3DNow! | + | First introduced in large-scale supercomputers SIMD instrucion sets have become popular in personal computing hardware, hence being mostly associated with these units. The most widely known SIMD instructions sets are AIMs (Apple-IBM-Motorola) [[WikiPedia:AltiVec|AltiVec]] for the PowerPC, AMDs [[Wikipedia:3DNow!|3DNow!]] and Intels MMX and SSE sets in their various versions. |
==MMX== | ==MMX== | ||
| − | MMX is a SIMD instruction introduced by Intel with the Pentium line | + | MMX is a SIMD instruction introduced by Intel with later models of the Pentium processor line. It provides integer operations only and has a strong limitation in that it makes it difficult to work with integer and floating point data at the same time, since it reuses the IA-32 FPU registers. |
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==SSE== | ==SSE== | ||
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==SSE 3== | ==SSE 3== | ||
SSE 3 extends the SSE 2 command set by 13 instrucions for converting floating point numbers into integer numbers, for complex arithmetics, video encoding, image processing and thread communications. | SSE 3 extends the SSE 2 command set by 13 instrucions for converting floating point numbers into integer numbers, for complex arithmetics, video encoding, image processing and thread communications. | ||
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| + | ==SSSE 3== | ||
| + | SSSE 3 extends the SSE 3 command set by 16 instrucions for both 32 and 64 Bit data (Intel counts it as 32) | ||
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| + | [[Category:Glossary]] | ||
Latest revision as of 12:50, 4 August 2007
SIMD (Single Instruction, Multiple Data) is a set of operations for efficiently handling large amounts of data. It makes it possible to execute one command on a set of data instances instead of having the same command to be executed on each of the data instances.
First introduced in large-scale supercomputers SIMD instrucion sets have become popular in personal computing hardware, hence being mostly associated with these units. The most widely known SIMD instructions sets are AIMs (Apple-IBM-Motorola) AltiVec for the PowerPC, AMDs 3DNow! and Intels MMX and SSE sets in their various versions.
MMX
MMX is a SIMD instruction introduced by Intel with later models of the Pentium processor line. It provides integer operations only and has a strong limitation in that it makes it difficult to work with integer and floating point data at the same time, since it reuses the IA-32 FPU registers.
SSE
SSE is a set of instuctions optimized for handling floating point operations on a 128 bit level.
SSE 2
SSE 2 contains 144 new commands for Cache and Memory management and the 64 bit commands of the MMX set were improved and extended to 128 bit.
SSE 3
SSE 3 extends the SSE 2 command set by 13 instrucions for converting floating point numbers into integer numbers, for complex arithmetics, video encoding, image processing and thread communications.
SSSE 3
SSSE 3 extends the SSE 3 command set by 16 instrucions for both 32 and 64 Bit data (Intel counts it as 32)
