Definitions for p5
The Intel Pentium microprocessor was introduced on March 22, 1993. Its microarchitecture, dubbed P5, was Intel's fifth-generation and first superscalar x86 microarchitecture. As a direct extension of the 80486 architecture, it included dual integer pipelines, a faster floating-point unit, wider data bus, separate code and data caches and features for further reduced address calculation latency. In 1996, the Pentium with MMX Technology was introduced with the same basic microarchitecture complemented with an MMX instruction set, larger caches, and some other enhancements. The P5 Pentium competitors included the Motorola 68060 and the PowerPC 601 as well as the SPARC, MIPS, and Alpha microprocessor families, most of which also used a superscalar in-order dual instruction pipeline configuration at some time. Intel's Larrabee multicore architecture project uses a processor core derived from a P5 core, augmented by multithreading, 64-bit instructions, and a 16-wide vector processing unit. Intel's low-powered Bonnell microarchitecture employed in Atom processor cores also uses an in-order dual pipeline similar to P5.
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