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公开(公告)号:US06658578B1
公开(公告)日:2003-12-02
申请号:US09410977
申请日:1999-10-01
申请人: Gilbert Laurenti , Jean-Pierre Giacalone , Emmanuel Ego , Anne Lombardot , Francois Theodorou , Gael Clave , Yves Masse , Karim Djafarian , Armelle Laine , Jean-Louis Tardieux , Eric Ponsot , Herve Catan , Vincent Gillet , Mark Buser , Jean-Marc Bachot , Eric Badi , N. M. Ganesh , Walter A. Jackson , Jack Rosenzweig , Shigeshi Abiko , Douglas E. Deao , Frederic Nidegger , Marc Couvrat , Alain Boyadjian , Laurent Ichard , David Russell
发明人: Gilbert Laurenti , Jean-Pierre Giacalone , Emmanuel Ego , Anne Lombardot , Francois Theodorou , Gael Clave , Yves Masse , Karim Djafarian , Armelle Laine , Jean-Louis Tardieux , Eric Ponsot , Herve Catan , Vincent Gillet , Mark Buser , Jean-Marc Bachot , Eric Badi , N. M. Ganesh , Walter A. Jackson , Jack Rosenzweig , Shigeshi Abiko , Douglas E. Deao , Frederic Nidegger , Marc Couvrat , Alain Boyadjian , Laurent Ichard , David Russell
IPC分类号: G06F132
CPC分类号: G06F7/764 , G06F5/01 , G06F7/607 , G06F7/74 , G06F7/762 , G06F9/30014 , G06F9/30018 , G06F9/30032 , G06F9/30043 , G06F9/30083 , G06F9/3013 , G06F9/30149 , G06F9/30181 , G06F9/30189 , G06F9/32 , G06F9/321 , G06F9/325 , G06F9/3552 , G06F9/3836 , G06F9/3838 , G06F9/384 , G06F9/3855 , G06F9/3867 , G06F9/3879 , G06F9/3885 , G06F9/3891 , G06K13/0825
摘要: A processor (100) is provided that is a programmable fixed point digital signal processor (DSP) with variable instruction length, offering both high code density and easy programming. Architecture and instruction set are optimized for low power consumption and high efficiency execution of DSP algorithms, such as for wireless telephones, as well as pure control tasks. The processor includes an instruction buffer unit (106), a program flow control unit (108), an address/data flow unit (110), a data computation unit (112), and multiple interconnecting busses. Dual multiply-accumulate blocks improve processing performance. A memory interface unit (104) provides parallel access to data and instruction memories. The instruction buffer is operable to buffer single and compound instructions pending execution thereof. A decode mechanism is configured to decode instructions from the instruction buffer. The use of compound instructions enables effective use of the bandwidth available within the processor. A soft dual memory instruction can be compiled from separate first and second programmed memory instructions. Instructions can be conditionally executed or repeatedly executed. Bit field processing and various addressing modes, such as circular buffer addressing, further support execution of DSP algorithms. The processor includes a multistage execution pipeline with pipeline protection features. Various functional modules can be separately powered down to conserve power. The processor includes emulation and code debugging facilities with support for cache analysis.
摘要翻译: 提供了具有可变指令长度的可编程固定点数字信号处理器(DSP)的处理器(100),提供高代码密度和易于编程。 架构和指令集针对低功耗和高效率执行DSP算法进行了优化,如无线电话以及纯控制任务。 处理器包括指令缓冲器单元(106),程序流控制单元(108),地址/数据流单元(110),数据计算单元(112)和多个互连总线。 双乘法累加块提高了处理性能。 存储器接口单元(104)提供对数据和指令存储器的并行访问。 指令缓冲器可用于在执行它之前缓冲单个和复合指令。 解码机构被配置为对来自指令缓冲器的指令进行解码。 使用复合指令可以有效地利用处理器内可用的带宽。 可以从单独的第一和第二编程存储器指令编译软双存储器指令。 可以有条件地执行或重复执行指令。 位场处理和各种寻址模式,如循环缓冲区寻址,进一步支持DSP算法的执行。 处理器包括具有管道保护功能的多级执行管线。 各种功能模块可以单独断电以节省电力。 处理器包括仿真和代码调试功能,支持缓存分析。