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vector processor |
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vector processorA computer with built-in instructions that perform multiple calculations on vectors (one-dimensional arrays) simultaneously. It is used to solve the same or similar problems as an array processor; however, a vector processor passes a vector to a functional unit, whereas an array processor passes each element of a vector to a different arithmetic unit. See pipeline processing and array processor.
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Proprietary vector processors have given way, first to RISC-based processors employed in HPC systems of the 1980s and early 1990s, and more recently to commodity Intel processors whose integer and floating-point performance improvements have outpaced more specialized processors. This approach makes it possible to use the tools employed by Microway in the past to drive vector processors like the i860, while at the same time enabling historic vectorization tools like VAST, that can automatically convert serial Fortran codes into Fortran programs that utilize vector FPGA primitives. Scott, the chief architect of the Cray X1 supercomputer, was named for developing a highly scalable, distributed shared memory multiprocessor, employing custom vector processors. |
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