SIMD can be internal and it can be directly accessible through an instruction set architecture, but it should not be confused with an ISA.
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12 Facts About SIMD
2.
SIMD describes computers with multiple processing elements that perform the same operation on multiple data points simultaneously.
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3.
SIMD is particularly applicable to common tasks such as adjusting the contrast in a digital image or adjusting the volume of digital audio.
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4.
SIMD has three different subcategories in Flynn's 1972 Taxonomy, one of which is SIMT.
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5.
SIMD was the basis for vector supercomputers of the early 1970s such as the CDC Star-100 and the Texas Instruments ASC, which could operate on a "vector" of data with a single instruction.
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6.
Current era of SIMD processors grew out of the desktop-computer market rather than the supercomputer market.
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7.
Outside of specialist areas and uses, for which SIMD has great savings, SIMD's disadvantages when used for general-purpose computing cannot be overemphasised.
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8.
Disadvantages of SIMD compared to Vector processing and even scalar processing for general-purpose use cannot be overstated.
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9.
Small-scale SIMD became popular on general-purpose CPUs in the early 1990s and continued through 1997 and later with Motion Video Instructions for Alpha.
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10.
SIMD instructions are widely used to process 3D graphics, although modern graphics cards with embedded SIMD have largely taken over this task from the CPU.
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11.
Additionally, many of the systems that would benefit from SIMD were supplied by Apple itself, for example iTunes and QuickTime.
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12.
Larger scale commercial SIMD processors are available from ClearSpeed Technology, Ltd.
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