JPS61279935A - Program processing system - Google Patents

Abstract

PURPOSE:To improve the using efficiency of a program memory as well as the processing speed by adding the arithmetic condition information to each instruction word of a program. CONSTITUTION:A CPU 1 reads an operating part OP1 out of a program memory 2 and fetches it to an arithmetic part 11 to check the arithmetic condition information 5A. If the information 5A is equal to 1, the CPU 1 reads again an operand 61 out of the memory 2 to write it to an operand information storage part 12 and executes the processing of the part OP1 read previously. Then an operating part OP2 is read out and the operand information is extracted out of the part 12 of the part 11 when the information 5A is equal to 0. Then the operand information is executed together with the contents of the OP2 fetched previously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program processing method in an information processing device such as a program control device.

[Conventional technology]

Generally, in such an information processing device, a predetermined process is performed by executing a log code stored in a program memory by a central processing unit.

Note that the program code (instruction word) consists of a processing instruction section (also referred to as an operation code section or operation section) and a processing operation information section (also referred to as an operand section), which determine the processing content.

FIG. 4 shows an example of a program stored in the program memory, with 51 to 53 representing operating sections and 61 to 63 representing operand sections.

[Problem that the invention seeks to solve]

However, in such a system, as shown in FIG. 4, even if the operand parts 61, 62, and 63 are the same, when the operation parts 51, 52, and 53 are different from each other, an operand part is defined for each instruction word. Therefore, the program memory capacity increases, and furthermore, the processing speed decreases.

Therefore, in the present invention, when the operand part of the instruction word of interest is the same as the operand part of the previous instruction word, its specification can be omitted, thereby increasing the efficiency of program memory use (reducing memory capacity). The purpose is to improve processing speed.

[Means for solving problems]

An operand information storage section is provided which adds calculation condition information to each program code and stores operand information of the program code executed last time.

[Effect]

Every time a program code is read from the program memory, it is checked whether the operand part is the same as the operand part of the previous program code by referring to the operation condition information, and if it is at least the same, the operand information storage section By executing a predetermined program based on the contents stored in the memory, the usage efficiency of the program memory is increased and the processing speed is improved.

〔Example〕

FIG. 1 is a schematic diagram showing an embodiment of the invention, FIG. 2 is a configuration diagram showing the format of an instruction word according to the invention, and FIG. 3 is a reference diagram showing an example of a program stored in a program memory according to the invention. be.

As is clear from FIG. 1, the feature is that in addition to the central processing unit (CPU) IK and the arithmetic unit 11 connected to the program memory 2 via the bus 3, a previous operand information storage unit 12 is provided. , so that the operand information of the instruction word executed last time in the arithmetic unit 11 is stored.

On the other hand, as shown in FIG. 2, five calculation condition information sections are added to the operation section for each command word. This is a part that indicates whether the operand part of the relevant instruction word is the same as the operand part of the previous instruction word. If they are the same, for example, at o"
, if they are different, "1" is stored respectively.

The operation of FIG. 1 will now be described in the case where a program consisting of command words such as and stored in the program memory is shown as shown in FIG. 3. In addition, in Figure 3, ! M, 52 and 53 are operation sections, 5A is an operation condition information section, and 61 is an operand section.

Furthermore, the CPU 1 reads out the operation section OP1 from the program memory 2 via the bus 3, imports it into the calculation section 11, and checks the calculation condition information 5A. In the example of FIG. 3, this information 5A is 1", so the CPU 1 again
The operand 61 is read out from the program memory 2 via the program memory 2 and stored in the arithmetic unit 11, and is also written into the previous operand information storage unit 12 to execute the process of the previously read operation unit OP1, and ends. Next, the CPU 1 similarly reads out the operation section OP2 from the program memory 2, imports it into the calculation section 11, and stores the operation condition information 5A.
Check. In this case, the operation condition information is "0", that is, the same as the previous operand, so the operation section 11 retrieves the operand information from the previous operand information storage section 12 and combines it with the contents of the operation section OP2 that was previously taken in. Execute the process and exit.

↓ The following steps are taken from program memory 2 in the same way.
When the operation condition information 5A that issued 1 is '1', the operand information is different from the previous one, so C
The PU 1 fetches the operand from the program memory 2 and stores it in the previous operand information storage section 12.
(While executing the process after writing to (), the calculation condition fl
fIi5A""°"001・"<9 y)""11
.

The CPU 1 executes processing based on the operand from the previous operand information storage section 12.

〔Effect of the invention〕

According to this invention, by adding operation condition information to each instruction word of a program, it is possible to omit the description of operand information when the same operand information continues, so that it is possible to improve the efficiency of program memory usage. This makes it easier to create a program, and furthermore, the reduction in the number of accesses to the program memory brings about the advantage of improving processing speed. In addition, when programming a group of instructions that are executed when a condition is met, by using this condition as operation condition information, you can define only one position at the beginning of the instruction group. , the efficiency of program memory usage can be greatly increased. Furthermore, since this calculation condition information only needs to be added to the instruction section of the program memory,
This can be achieved without placing a large burden on the instruction section.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the invention, FIG. 2 is a configuration diagram showing the format of an instruction word according to the invention, and FIG. 3 is a diagram showing an example of a program stored in a program memory according to the invention. , FIG. 4 is a reference diagram showing an example of a conventional program stored in a program memory. Code explanation 1011. ... Central processing unit, 2 ... Program memory, 3 ... Bus, 5, 51, 52.53.
...Processing instruction section (operation section), 61 to 63...
...Processing calculation information section (operand section), 5A...
・Calculation condition information section, 11...Calculation section, 12...
...Previous operand information storage section. Agent Patent Attorney Akio Namiki Agent Patent Attorney Kiyoshi Matsuzaki Figure 1 Figure 3511, qA Tomi 4 Figure

Claims (1)

[Claims] In an information processing system comprising a central processing unit and a program memory storing a program code to be executed by the central processing unit, each program code has an operand part that is the same as the operand part of the previous program code. The central processing section is provided with an operand information storage section that stores operand information of the program code executed last time, and the central processing section stores the operand information of the program code executed last time. Each time a program code is read out, it is checked whether the operand part is the same as the operand part of the previous program code by referring to the operation condition information, and if it is at least the same, it is stored in the operand information storage part. A program processing method characterized in that a predetermined program is executed based on the contents of the program.