A microprocessor with a 128-bit CPU, ten floating-point MAC's, four floating-point dividers, and an MPEG-2 decoder

摘要

A 250-MHz microprocessor intended for home computer entertainment consists of a CPU core with 128-b multimedia extensions, two single-instruction, multiple-data (SIMD) very long instruction word (VLIW) vector processors containing ten floating-point multiplier accelerators and four floating-point dividers, an MPEG-2 decoder, a ten-channel direct memory access (DMA) controller, and other peripherals with 128 b internal buses on one die. The core is a two-way superscalar MIPS-compatible microprocessor with 16-kB scratch-pad RAM. Each vector processor is a five-way SIMD-VLIW architecture, which is tightly dedicated for specific applications concerning three-dimensional geometry calculation and physical simulation. A DMA controller connects between main memory and each processor's local memory to conceal memory access penalty. It contains 10.5 M transistors in 17/spl times/14.1 mm and dissipates 15 W at 1.8 V.