JPH04175823A - Edit table initialization control system - Google Patents

Abstract

PURPOSE:To eliminate redundant initialization processing by controlling the execution of initialization of an edit table corresponding to the contents of a character system code designated by an edit instruction and a register which holds the character system code handled by the edit table. CONSTITUTION:The execution of the initialization of the edit table 1 is controlled corresponding to the contents of the character system code designated by the edit instruction and the register 2 which holds the character system code handled by the edit table 1. In other words, a control circuit 3 performs such control to suppress(bypass) the initialization of the table 1 when it is judged that the character system code designated by the edit instruction is equal to a code represented by the register 2. Thereby, it is possible to realize the reduction of redundant initialization when the edit instruction is executed by the same character system code, and to attain the acceleration of processing.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an edit table initialization control method.

[Conventional technology]

Conventionally, processing of an editing command in an information processing apparatus has been performed according to the following procedure. Here, the editing commands are, for example,
Requires three operands, and uses a control code stored in the address pointed to by the second operand to convert or edit data stored at the address pointed to by the first operand according to the control code. This is an instruction that executes processing such as executing a command and storing the result at the address pointed to by the third operand.

First, in an edit command, the character code specified by the command at the start of the command, for example, ASC[[.

The edit table is initialized according to EBCDIC, BCD, etc. Since the edit table may be changed by executing the command, this initialization must be performed every time the edit command is executed. The processing flow is shown in FIG.

The initialization here is, for example, the process of reading out an initial pattern according to the character code specified by the command from the outside at the start of an edit command, and writing it to the edit table, and a series of these processes. This required several to tens of cycles.

[Problem to be solved by the invention]

The conventional table initialization described above is always executed every time an editing command is executed, but generally the character encoding system used in a series of programs is the same and the editing table is changed. Since the frequency is low, executing initialization for each editing command written in a series of programs has the disadvantage of reducing the overall processing speed due to redundant processing.

[Means for Solving the Problems] The method of the present invention handles a plurality of writing system codes, has an editing instruction consisting of an instruction execution processing phase or an initial phase, and a subsequent processing phase, It consists of a plurality of engines 1-1 that can be initialized according to the character system code specified by the editing command to be executed in the phase, and that can be rewritten as necessary in the subsequent processing phase of the editing command. In an edit table initialization control method in an information processing device that monitors an edit table, means for holding a character system code handled by the edit table and setting the character system code specified by the edit command in the register. and means for invalidating the register in response to the rewriting of the edit table, the initialization of the edit table depending on the writing system code specified by the edit command and the contents of the register. It is characterized by controlling execution.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

Table 1 is initialized in accordance with the character code specified by the command in the initial phase of execution of the edit command. Furthermore, it is composed of a plurality of entries that can be rewritten as necessary in the subsequent processing phase of the edit command.

As input data, an initial pattern or rewrite data can be written to the entry pointed to by the write address output from the control circuit 3, and the contents of the entry pointed to by the read address can be read.

Register 2 holds the character system code of the character system held in Table 1, and if the table is rewritten as necessary in the subsequent processing phase of the edit command, its contents will have no effect (O cleared). .

If the control circuit 3 determines that the character system code specified by the editing command is equal to the code indicated by the register 2, it performs control to suppress (bypass) initialization of the table. Also, register 2 is invalidated when table 2 is rewritten. Furthermore, when initialization is executed, control is performed such that the character system code specified by the editing command is set in register 2.

The operation is described below.

With the start of the editing command, the control circuit 3 starts the external core unit (
The editing command start instruction and the character system code specified by the command are received from a computer (not shown), and the control described below is performed.

Check whether the value of register 2 is invalidated (for example, cleared to 0), and if it is invalidated,
The character system code specified by the editing command is set in register 2, and an initial pattern according to the character system code is set in table 1.

Further, even if the value in register 2 is valid and the character system code specified by the editing command and the value in register 2 do not match, the initial pattern is set in table 1 as described above.

On the other hand, if register 2 is valid and the value of register 2 is equal to the character system code specified by the edit command, setting of the initial pattern to table 1 is suppressed. Subsequently, in subsequent processing, Table 1. When there is a rewriting request, the contents of register 2 are invalidated (cleared to 0). ''--the 71 processes described above--are shown in FIG.

〔Effect of the invention〕

By adopting the configuration as described above, the present invention has the following features:
This has the effect of reducing redundant initialization cycles when executing editing commands using the same character system code, and speeding up processing.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a processing flowchart of an editing command based on the configuration of the present invention.
FIG. 3 is a conventional processing flowchart for editing commands. 1...Table, 2...Register, 3...Control circuit.

Claims (1)

[Claims] An editing instruction that handles a plurality of character system codes and whose execution processing phase consists of an initial phase and a subsequent processing phase, and an editing instruction to be executed in the initial phase of the execution of the editing instruction. In an edit table initialization control method in an information processing device having an edit table including a plurality of entries that can be initialized according to a specified character system code and can be rewritten as necessary in a subsequent processing phase of the edit command, the edit table a register for holding a character system code handled by the editor; means for setting a character system code specified by the edit command in the register; and means for invalidating the register in response to rewriting of the edit table. . An edit table initialization control method, characterized in that execution of initialization of the edit table is controlled according to a character system code specified by the edit command and the contents of the register.