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    Digital data processing system using unique ALU register files and micro-instruction stacks
    6.
    发明授权
    Digital data processing system using unique ALU register files and micro-instruction stacks 失效

    公开(公告)号：US4480306A

    公开(公告)日：1984-10-30

    申请号：US266425

    申请日：1981-05-22

    申请人： Brett L. Bachman ,  Richard A. Belgard ,  David H. Bernstein ,  Richard G. Bratt ,  Gerald F. Clancy ,  Edward S. Gavrin ,  Thomas M. Jones ,  Lawrence H. Katz ,  Craig J. Mundie ,  John F. Pilat ,  Stephen I. Schleimer ,  Steven J. Wallach ,  Walter A. Wallach, Jr. ,  Douglas M. Wells

    发明人： Brett L. Bachman ,  Richard A. Belgard ,  David H. Bernstein ,  Richard G. Bratt ,  Gerald F. Clancy ,  Edward S. Gavrin ,  Thomas M. Jones ,  Lawrence H. Katz ,  Craig J. Mundie ,  John F. Pilat ,  Stephen I. Schleimer ,  Steven J. Wallach ,  Walter A. Wallach, Jr. ,  Douglas M. Wells

    IPC分类号： G06F9/26 ,  G06F9/22

    CPC分类号： G06F9/26

    摘要： A data processing system having a flexible internal structure, protected from and effectively invisible to users, with multilevel control and stack mechanisms and capability of performing multiple, concurrent operations, and providing a flexible, simplified interface to users. The system is internally comprised of a plurality of separate, independent processors, each having a separate microinstruction control and at least one separate, independent port to a central communications and memory node. The communications and memory node is an independent processor having separate, independent microinstruction control and comprised of a plurality of independently operating, microinstruction controlled processors capable of performing multiple, concurrent memory and communications operations. Addressing mechanisms allow permanent, unique identification of information as objects and an extremely large address space accessible and common to all such systems. Addresses are independent of system physical configuration and, as particularly described with reference to the invention herein, identify locations of object information to be accessed by utlizing address formats which comprise an object field, offset field and a length field so that information can be identified to bit granular level and to information type and format. Arithmetic logic unit (ALU) means, also as particularly described with reference to the invention herein, include general register means having three vertically oriented parts for storing such respective fields. Such ALU means further include an ALU microinstruction stack means having at least one microinstruction stack frame for storing the state of execution of a microinstruction. A memory microinstruction stack is provided to store a plurality of microinstruction stack frames so that microinstruction stack frames can be transferred between the ALU and the memory microinstruction stacks. Protection mechanisms provide variable access rights associated with individual bodies of information. User language instructions are transformed into dialect coded, uniform, intermediate level instructions to provide equal facility of execution for all user languages. Operands are referred to by uniform format names which are transformed, by internal mechanisms transparent to users, into addresses.

    Method of performing a call operation in a digital data processing system having microcode call and return operations
    10.
    发明授权
    Method of performing a call operation in a digital data processing system having microcode call and return operations 失效
    在具有微码呼叫和返回操作的数字数据处理系统中执行呼叫操作的方法

    公开(公告)号：US4493027A

    公开(公告)日：1985-01-08

    申请号：US266526

    申请日：1981-05-22

    申请人： Lawrence H. Katz ,  Douglas M. Wells ,  Michael S. Richmond ,  Richard A. Belgard ,  Walter A. Wallach, Jr. ,  David H. Bernstein ,  John K. Ahlstrom ,  John F. Pilat ,  David A. Farber ,  Richard G. Bratt

    发明人： Lawrence H. Katz ,  Douglas M. Wells ,  Michael S. Richmond ,  Richard A. Belgard ,  Walter A. Wallach, Jr. ,  David H. Bernstein ,  John K. Ahlstrom ,  John F. Pilat ,  David A. Farber ,  Richard G. Bratt

    IPC分类号： G06F9/40 ,  G06F3/00 ,  G06F9/22 ,  G06F9/36 ,  G06F9/46

    CPC分类号： G06F9/4425

    摘要： A method for executing call and return instructions in a digital computer system operating under control of microcode. The microcode may specify calls to and returns from sequences of microinstructions. A call microinstruction sequence corresponds to the call instruction. The call microcode in turn calls other microinstruction sequences for deriving pointers representing the location of the called procedure and of arguments from operands in the call instruction. As the call microcode obtains each argument pointer, it places the pointer on the stack. After it has obtained all of the argument pointers, it passes the pointer to the called procedure and a pointer to the argument pointers to a general call microinstruction sequence. That microinstruction sequence locates the called procedure, makes a new frame including the argument pointers, and saves the state necessary to resume execution of the call microinstruction sequence itself. It then obtains the state necessary to commence execution of the called procedure and causes execution of that procedure to commence. The microcode corresponding to the return instruction restores both the state necessary to resume execution of the calling procedure and the state necessary to resume execution of the call microinstruction sequence. When it resumes execution, the call microinstruction sequence completes the return operation.

    摘要翻译： 一种在微码控制下操作的数字计算机系统中执行呼叫和返回指令的方法。 微代码可以指定对微指令序列的调用和返回。 调用微指令序列对应于调用指令。 调用微代码又调用其他微指令序列来导出表示被调用过程的位置的指针，以及调用指令中操作数的参数。 当调用微代码获取每个参数指针时，它将指针放在堆栈上。 在获取所有参数指针之后，它将指针传递给被调用的过程，并将指针指向一般调用微指令序列。 该微指令序列定位被调用的过程，创建一个包含参数指针的新帧，并保存恢复执行调用微指令序列本身所需的状态。 然后获得开始执行被叫程序所必需的状态，并使该程序的执行开始。 对应于返回指令的微代码恢复恢复执行调用过程所需的状态和继续执行调用微指令序列所需的状态。 当它恢复执行时，调用微指令序列完成返回操作。