专利名称：AN INSTRUCTION LENGTH DECODER FOR VARIABLE LENGTH INSTRUCTIONS
发明人：LEE, Chan, W.,BROWN, Gary, L.,CARBINE, Adrian, L.,GUPTA, Ashwani, Kumar
申请号：US1995011914
申请日：19950918
公开号：WO96/010783P1
公开日：
19960411
专利内容由知识产权出版社提供
字符串长度可以用lenngtn吗js摘要：A circuit (50) and method for supplying output length marks indictive of the first bytes and last bytes of instructions in a block of instruction code to an instruction decoder. A block of instruction code is input to an input buffer (210). A plurality of programmable logic arrays (PLAs) (222a..222p) is coupled to receive pedetermined sets of bytes from the input buffer and to provided instruction information at an output. The output of the PLAs is coupled to fast carry chain circuitry (240), which serially processes the information from the PLAs and provides a START mark upon each finding of a first byte of an instruction and an END mark upon each finding of a last byte of an instruction. Length information is provided to wraparound logic (260) for length calculations spanning into the next input buffer of instruction code. An FCC latch (258) latches the output length marks from the fast carry chain circuitry and provides an output to the instruction decoder. If a length-varying prefix and a matching length-varying opcode are both present in an instructing, processing in the fast carry chain circuitry is aborted, and processing in slow carry chain circuitry is started.
申请人：INTEL CORPORATION
地址：US
国籍：US
代理机构：MALLIE, Michael, J.更多信息请下载全文后查看

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