JPH01205337A - Instruction control system - Google Patents

Abstract

PURPOSE:To easily add optional number of new instructions of functions by permitting an integrated circuit computer to set the storage position of a leading instruction in a function instruction group by means of executing a specified instruction stored in the specified area of a storage device. CONSTITUTION:When the integrated circuit computer 10 stores the instruction to be executed in the area 201 of a mains storage device 20, it sequentially executes the instructions stored in the positions which an instruction execution order counter 101 indicates. The content of the counter 101 is sequentially altered with the execution processing of the instructions. A control part 103 sets the content of the counter 101 to be the storage position of the specified instruction to be executed next. The specified instruction shifts control to the function instruction group stored in the area 220. When the execution of the instructions terminates and the computer 10 executes the specified instruction, the control part 103 obtains the storage position of the instruction which is successively stored, and sets it in an instruction position preservation register 102. The control part 103 fetches the group number of the specified instruction and sets information showing the storage position in the counter 101. Thus, the new instructions can be added by the optional number.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an instruction control method for an integrated circuit computer in which the functions of the computer are realized by a single integrated circuit, and in particular, the present invention relates to an instruction control system for an integrated circuit computer in which the functions of the computer are realized by a single integrated circuit. [Prior art] Conventionally, the types of instructions that an integrated circuit computer can provide to the user, that is, the functions that can be realized using one instruction, are based on the hardware of the integrated circuit computer. and the microprogram that controls the hardware.

[Problem to be solved by the invention]

Conventionally, as mentioned above, the instruction functions that can be given to the user are determined by the hardware included in an integrated circuit computer and the microprogram that controls the hardware. teeth,
There was a problem in that the hardware constituting the integrated circuit computer and the microprogram that controlled it had to be changed, and the integrated circuit computer had to be rebuilt.

The present invention solves these problems, and its purpose is to make it possible to add any number of instructions that provide new functionality without having to rebuild the integrated circuit.

[Means to solve the problem]

In order to solve these problems, the present invention sets the storage location of the next instruction to be executed in an instruction execution order counter, and executes the instruction whose storage location is set in the instruction execution order counter every time the instruction is executed. In an integrated circuit computer that manages the execution order of instructions by updating the contents of the instruction execution order counter in accordance with the instruction, the integrated circuit computer stores information in a storage device connected to the integrated circuit computer that is executed by the integrated circuit computer. a first area in which a program is stored; and the integrated circuit computer has a function that is protected from the program stored in the first area and that the integrated circuit computer does not provide with a single instruction. a second area in which a group of functional instructions realized only by instructions and an instruction group storage location table indicating the storage location of the functional instruction group are provided in the integrated circuit computer; an instruction location storage register is provided in the integrated circuit computer; The computer refers to the instruction group storage location table stored in the second area by executing a specific instruction that specifies one of the functional instruction groups stored in the second area. The storage position of the first instruction of the functional instruction group specified by the specific instruction is set in the instruction execution order counter, and the first
By setting the storage location of the instruction stored in the area in the instruction location storage register and executing all the instructions constituting the functional instruction group specified by the specific instruction, the storage location of the instruction stored in the instruction location storage register is set. The contents of the command execution sequence are set in the instruction execution sequence counter.

[For production]

By executing a specific instruction that specifies one of the functional instruction groups stored in the second area of the storage device, the integrated circuit computer refers to the instruction group storage position W table and sets the instruction execution order counter. Sets the storage location of the first instruction of the functional instruction group specified by the specific instruction. As a result, the instructions constituting the functional instruction group specified by the specific instruction are sequentially executed. Further, by executing the specific instruction, the integrated circuit computer saves the storage location of the instruction stored in the first area following the specific instruction. By executing all the instructions constituting the functional instruction group specified by the specific instruction, the integrated circuit computer sets the storage location stored in the instruction location storage register in the instruction execution order counter. As a result, the instructions stored in the first area are sequentially executed again.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, which includes an integrated circuit computer 10, a main memory bag R20, and an input/output device 30. The integrated circuit calculation Ja1o includes an instruction execution order counter 101, an instruction position storage register 102, and a control section 103 that controls each section using a microprogram. The main storage device 1W20 stores programs that operate on the integrated circuit computer 10, or the contents are read out by the programs.

A first area 201 where writing can be performed without restriction;
JS product circuit calculation [1 (region 201 by protection function of l)
The area 202 includes a second area 202 whose contents are prohibited from being read or written depending on the program therein.
2 stores a group of functional instructions that the integrated circuit computer 10 implements using only the instructions that the integrated circuit computer 10 has; The area 221 stores an instruction group storage position π table indicating the storage position in area 202 of the first instruction of each function instruction group.

An instruction execution order counter 101 provided in the integrated circuit calculation a10 manages the execution order of instructions.
The storage location of the instruction to be executed next to the instruction currently being executed by the integrated circuit computer 10 is set.

Now, for example, if the contents of the main memory 20 are as shown in FIG. 2 and the next instruction to be executed by the integrated circuit computer 10 is instruction AAA, then the instruction execution order counter is as shown in FIG. A storage location aaa of the instruction AAΔ is set in 101. That is, the relationship between the contents of the instruction execution order counter 101 and the next instruction to be executed by the integrated circuit computer 10 is as shown in state #l in FIG. Furthermore, if the next instruction to be executed by the integrated circuit computer 10 after instruction AA is instruction BI3B, then the instruction execution order counter 10
The content of 1 is the instruction B when the instruction △AA is executed.
The storage position is changed to bbb of B13, and the relationship between the instruction execution order counter 101 and the next instruction to be executed becomes as shown in state #2 in FIG. Instruction position save register 10
2 is an integrated circuit meter 'l'1. It is not used at all when the machine 10 is executing normal instructions, but when the integrated circuit computer IO executes a specific instruction (in this embodiment, the instruction KKK),
The position of the instruction stored next to the specific instruction KKK is stored.

Next, the operation of this embodiment will be explained. The control unit 103 in the integrated circuit computer 10 first performs a process to change the value θ1n from the initial state. In this (1! value processing), control N "part 103
reads from the input/output device 30 a pre-prepared number of functional instruction groups and an instruction group storage location table indicating the storage position in the area 220 of the first instruction of each functional instruction group, and executes each read function. The instruction group is stored in the area 220 according to the instruction group storage location table.
and writes the instruction group storage position table to 811J 221.

Unless this process ends normally, the integrated circuit computer 10
It is assumed that the command stored in the area 201 of the main storage device 20 cannot be executed.

When the preparation process is completed, the integrated circuit computer 10 stores instructions to be executed in the area 201.

FIG. 4 shows the main storage device 20 after the above-mentioned processing has been performed.
It is a figure showing an example of the contents. That is, in the area 201 of the main storage device 20, there are instructions AAA, instructions BBB1 specific instructions KKK, instructions CCC, and instructions DDD.

... are stored in the area 220, and each instruction xX
X8. Instruction Y Y Y , ・, Instruction ZZZZ+ (
n function command groups consisting of i-1 to i-n) are stored. Note that the subscript i corresponds to the group number of the functional instruction group.

When the integrated circuit computer 10 stores instructions to be executed in the area 201 of the main memory 20, it sequentially executes the instructions stored in the position indicated by the instruction execution 1+li order counter 101. Normally, programs in area 201 are running without knowing the existence of area 220.

FIG. 5 shows the instruction execution order counter 10 during instruction execution.
1 is a diagram showing state transitions of the instruction position storage register 102 and the instruction position storage register 102. FIG. The contents of the instruction execution order counter 101 are sequentially changed as instructions are executed, and become as shown in state #l in the figure. In state #1, the contents of the instruction execution order counter 101 indicate the storage position aaa to the instruction AA, so when the processing for the currently executed instruction is completed, the integrated circuit device 10 will move to the instruction AA. 8, the control unit 103 sets the contents of the instruction execution order counter 101 to the storage location bbb of the next instruction BBB to be executed, as shown in state #2 in the figure. When the execution of instruction AAA is completed, the integrated circuit computer 10 executes instruction 13BB, and the control unit 103 changes the contents of the instruction execution order counter 101 to the specific instruction KKK to be executed next, as shown in state #3 in the figure. Let the storage position be kkk.

The specific instruction KKK is an instruction that transfers control to a group of functional instructions stored in the area 220. For example, as shown in FIG. 6, an instruction code indicating that the instruction is a specific instruction KKK is stored. It consists of an instruction code field 301, a group number field 302 in which the group number of the functional instruction group to be executed among the multiple functional instruction groups stored in the area 220 is stored, and a reserved field 303. There is. The reserve field 303 is provided preliminarily and is, for example, an area of data to be included in a group of functional commands instructed to be executed by a specific command KKK. ! 1i201
Information indicating the storage location in the file, etc. is stored.

When the execution of the instruction BBB is completed and the integrated circuit device 1 executes the specific instruction KKK, the control unit 103 executes the instruction CC stored following the specific instruction KKK in the area 201.
Find the storage position CCC of C, then state #3 in FIG.
As shown in FIG. 3, information indicating the storage location Ccc is set and saved in the instruction location storage register 102. Storage position CCC
When the information indicating the specified instruction KKK is stored in the instruction position storage register 102, the control unit 103 saves the information indicating the group number field 3 of the specific instruction KKK.
The group number (in this case, i) stored in 02 is extracted, and based on the instruction group storage position table stored in area 221, the first instruction XXX of the functional instruction group corresponding to group number i is extracted. Find the storage position XXX1 and enter state #4 in Figure 5.
As shown, the value stored in the instruction execution order counter 101;
Set information indicating ηXXX1.

In state #4, the contents of the instruction execution order counter 101 are the first instruction XXX of the functional instruction group having group number i,
Since it shows the stored value ZXXX+, the specific instruction KKK
When the processing of
, and the control unit 103 counts the instruction execution order counter 10
1, as shown in state #5 in the figure, the stored value ay of the instruction YYY to be executed next in the functional instruction group with group number i.
Let it be yyr.

Thereafter, in the integrated circuit computer IO, updating of the instruction execution order counter 101 and execution processing of the instructions constituting the functional instruction group are repeatedly performed, and eventually the contents of the instruction execution order counter 101 change to state #J in the figure. As shown in , the group number i
The stored value fiz of the last instruction 222 in the functional instruction group of
z Zi, and the command 222. is executed. When the instruction 222 is executed, the control unit 103 changes the contents of the instruction execution order counter 101 to the storage position of the instruction CCC stored in the storage register 102, as shown in state #(J+1) in the figure. Change to CCC. Therefore, from now on, the instructions CCC, instructions DDD, . . . stored in the area 201 of the main storage device 2o are again executed in sequence.

〔Effect of the invention〕

As explained above, the present invention stores instructions to be executed by a total of 3 integrated circuits in a first area on a storage device, and stores a function instruction BY and a group of function instructions for realizing a new function in a second area. Store an instruction group storage location table showing the storage location of
The integrated circuit computer refers to the instruction group storage location table stored in the second area by executing a specific instruction that specifies one of the functional instructions stored in the second area. The storage location of the first instruction of the functional instruction group specified by a specific instruction is set in the instruction execution order counter, and the instructions making up the functional instruction group are executed sequentially, so there is no need to rebuild the integrated circuit computer. This has the advantage of allowing the user to optionally add commands for new functions that can be executed by a single command.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of FIG. 1, and FIG. 3 is a diagram showing the relationship between the contents of the instruction execution order counter 101 and the instructions to be executed. , FIG. 4 is a diagram for explaining the operation of FIG. 1, FIG. 5 is a diagram showing the state transition of the instruction execution order counter loI and the instruction position storage register 102 when an instruction is executed, and FIG. 6 is a diagram for explaining the operation of the specific instruction. It is a figure showing an example of composition of KKK. In the figure, lO... integrated circuit computer, 20... main memory, 30... input/output device, 101... instruction execution order counter, 102... instruction position storage register, 103...・Control unit.

Claims (1)

[Scope of Claims] The storage position of the next instruction to be executed is set in an instruction execution order counter, and each time the instruction whose storage position is set in the instruction execution order counter is executed, the instruction execution order counter is set according to the executed instruction. In an integrated circuit computer that manages the order of execution of instructions by updating the contents of the first integrated circuit computer in which a program executed by the integrated circuit computer is stored in a storage device connected to the integrated circuit computer. and a functional instruction that is protected from the program stored in the first area and that realizes a function that the integrated circuit computer does not provide using a single instruction only by the instruction that the integrated circuit computer has. and a second area in which an instruction group storage location table indicating the storage location of the functional instruction group and the functional instruction group are provided, the integrated circuit computer is provided with an instruction location storage register, and the integrated circuit computer is provided with the second area. By executing a specific instruction that specifies one of the functional instruction groups stored in the area, the instruction group storage location table stored in the second area is referred to and the instruction specified by the specific instruction is executed. The storage position of the first instruction of the functional instruction group is set in the instruction execution order counter, and the first
By setting the storage location of the instruction stored in the area in the instruction location storage register and executing all the instructions constituting the functional instruction group specified by the specific instruction, the storage location of the instruction stored in the instruction location storage register is set. An instruction control method characterized in that the contents of the instruction execution sequence counter are set in the instruction execution sequence counter.