JPS63118941A - Data processor - Google Patents

Abstract

PURPOSE:To efficiently perform the processing of a list data, by transferring the list data of a list form to a register device, and shifting an address part. CONSTITUTION:A data processor is constituted of a memory device 10 which stores the list data in the list form, a shift device 11 which shifts the output of the memory device 10 or a register device 12 by an input selection signal and a shift control signal, and the register device 12 which stores the list data of the list form. The shift device 11 refers to the input selection signal, and inputs the output of either the memory device or the register device, and segments the address part of an inputted list data, and decides the kind of shifting based on the shift control signal. The shift control signal which performs the shifting of CAR, CDR, RCAR, and RCDR respectively, and the one performs no shifting are prepared. Next, the shift device 11 executes a shift operation based on a selected kind of shifting, and outputs the address part after shifting and an original value part finally by unifying them in one.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data processing device mainly intended for use in the field of artificial intelligence.

BACKGROUND OF THE INVENTION In recent years, the field of artificial intelligence has been actively researched as one of computer applications. In this field, it is necessary to process structured data, and therefore LISP, a language that can handle structured data, is widely used. Since it is inefficient to execute the LIsP language on a general-purpose computer, special-purpose machines with various improvements have been developed (for example, "rIlsP Machine" Information Processing Vol. 23 No. 8 pp. 752-772).
- These dedicated machines were improved mainly by approaching from a linguistic perspective, but they changed the representation of lists, which are structured data, inside the computer in a tabular format instead of the usual representation using pointers. Research has also been carried out on the following topics (for example, ``High-speed matching method for structured data'', Information Processing Society of Japan 33rd National Conference 7O-2).
).

A conventional data processing apparatus using the above-mentioned tabular representation of a list will be described below with reference to the drawings.In the tabular representation, the node positions of the leaves of the list are sequentially numbered in the CDR direction as a method of representing the node positions of the leaves of the list. By adopting a one-dimensional vector representation in which items are sequentially assigned in the CAR direction, list data is expressed as a table in which leaf position information and leaf information are sequentially arranged. That is, the list data is expressed as a set of data in which a vector indicating position information of a leaf is paired with information about the leaf itself.

Figure 3 shows an example of the expression of list data. This shows the diagrammatic expression + a + of list data where A (B (C) > D) and tabular expression (1) when expressed in 8 formulas. In the 0-diagrammatic representation Tal, which is a diagram, circles represent non-leaf list nodes, and squares represent leaf nodes. Further, the number string added above each node indicates the node position expressed according to the above-described method. This leaf part is extracted and expressed in the form of a table (tabular data), which consists of a table in which the address part contains the node position vector and the value part contains the leaf elements.

When a list is expressed in such a tabular format, the calculation method is naturally different from that in normal pointer expression, and conventional data processing devices that process such tabular data are as shown below. Requires extensive table operations.

FIG. 4 shows an example of table operations in the basic list operation functions of LISP.

As is clear from Figure 4, the CAR function can be executed by extracting the element whose address field starts with 1 and shifting the second and subsequent addresses toward the beginning (hereinafter referred to as CAR shift). . The CDR function, contrary to the CAR function, is executed by removing the element whose starting address is 1 and subtracting 1 from the starting address of the remaining element (hereinafter referred to as CDR shift).

The C0N5 function is a little more complicated.

For the first argument of the fcONs function, shift the address part in the opposite direction to the leading direction, and set the leading address to 1. This is an operation opposite to the CAR shift described above,
Hereinafter, this will be referred to as RCAR shift.

For the second argument, 1 is added to the start address (hereinafter this will be referred to as RCDR shift for the same reason as RCAR).

Next, if we put these two arguments together as one table, C0N
5 functions are executed.

Problems to be Solved by the Invention However, the C
The problem is that conventional data processing devices based on tabular representation are inefficient because basic LISP functions such as AR, CDR, and C0N5 require shift operations for all elements in tabular representation. It had

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a data processing device that can efficiently process list data in a tabular format with an hour wheel configuration.

Means for Solving the Problems In order to solve the above problems, the data processing device of the present invention includes a shift device that performs a shift operation on the address part of list data, and the shift device includes a register device that stores the list data. Shift operations can be performed not only on the data in the register device, but also on the list data transferred to the register device.

Effect of the Invention With the above-described configuration, the present invention can transfer table-format list data to the register device and shift its address part at the same time, eliminating the need to execute unnecessary transfers and efficiently processing list data. becomes possible.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a data processing device in an embodiment of the present invention. In Figure 1,
10 is a memory device that stores list data in tabular form;
1 is the output of the memory device 10 or register device 12,
A shift device 12 shifts based on an input selection signal and a shift control signal, and a register device 12 stores elements of list data in a tabular format.

The operation of the data processing apparatus of this embodiment configured as described above will be described below. The shift device 11 selects an input, determines the type of shift, and executes the shift according to FIG. That is, first, in step 20, the input selection signal is referred to, and the output of either the memory device 10 or the register device 12 is input (steps 21 and 22).Next, the address part of the input list data is input in step 23. The type of shift is determined based on the shift control signal (step 24). The types of shifts include the above-mentioned CAR shift, CDR shift, and R shift.
There are five types: CAR shift, RCDR shift, and no shift.The shift operation determined in step 24 is executed in step 25.Finally, the shifted address part and the original value part are combined into one. and output it (step 26).

In this embodiment, the above-mentioned five types of shift were used, but the shift type is not limited to these five types.6 For example, CAR shift, CDR shift, RCAR shift,
It may be possible to perform NCAR shift, NCDR shift, RNCAR shift, and RNCDR shift in which each RCDR shift is executed multiple times. Furthermore, a combination of the above shifts may be executed.

Effects of the Invention As is clear from the above description, the present invention provides a memory device that stores first data as tabular data consisting of an address section indicating the position of a node and a value section indicating a reference to the data value. a register device for storing elements of the tabular data; and a shift device connected to an input of the register device to perform a shift operation on an address part of the data output from the memory device or the register device. , the shift device can perform a shift operation on the list data in the register device, and can also perform a shift operation when transferring the list data from the memory device to the register device;
It becomes possible to efficiently shift the address part of list data, and the excellent effect that list data can be processed at high speed is obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a data processing device in one embodiment of the present invention, FIG. 2 is a flowchart showing the flow of processing of a shift device in one embodiment of the present invention, and FIG.
The figure shows an example of a tabular representation of list data, and FIG. 4 is an explanatory diagram for explaining back operations corresponding to the basic list operation functions of LSP. 10... Memory device, 11... Shift device, 12... Register device. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 1 Figure 2 Figure 3 (A (F3 (ko)) D)

Claims (1)

[Claims] a memory device that stores list data as tabular data consisting of an address section indicating the position of a node and a value section indicating a reference to a data value; a register device that stores elements of the tabular data; A shift device is connected to an input of the register device and performs a shift operation on an address part of list data output from the memory device or the register device, and the shift device performs a shift operation on the list data in the register device. A data processing device characterized in that it is also possible to perform a shift operation when transferring list data from the memory device to the register device.