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不久前,一种新型处理器芯核受到了极大的关注,这是一种可以为特定应用而量身定制的处理器——可配置处理器。可配置处理器不仅比标准的嵌入式微处理器更快,而且可以胜任更多工作。有些可配置处理器甚至可以代替ASIC和系统芯片(SOC)中的手工编码RTL。流行的固定指令集架构(fixed-ISA)嵌入式微处理器的架构设计起始于上世纪80年代,例如ARM、MIPS和PowerPC处理器,它们均被设计为独立的芯片。这些架构对许多算法的执行是令人满意的,但设计者经常要提高硬件设计中的关键部分的运行速度。即使是DSP架构也无法满足客户定制解决方案的速度要求。
Not long ago, a new type of processor core received great attention, a processor that can be tailored to a specific application - a configurable processor. Configurable processors are not only faster than standard embedded microprocessors, but can do more work. Some configurable processors can even replace manual coded RTLs in ASICs and system-on-chips (SOCs). The popular fixed-ISA architectures for embedded microprocessors started in the 1980s, such as ARM, MIPS, and PowerPC processors, all designed as standalone chips. These architectures are satisfactory for many algorithms, but designers often want to speed up the critical part of the hardware design. Even the DSP architecture can not meet the speed requirements of custom solutions.