JPH0769823B2 - Information processing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an information processing apparatus, and more particularly to an information processing apparatus that controls a storage operation of information in a storage unit.

2. Description of the Related Art Conventionally, this type of information processing apparatus has a storage unit that stores information, an operation execution unit that executes an operation of information extracted from the storage unit, an instruction decoding unit that decodes an instruction, and an instruction decoding unit. And a command processing control unit that generates control signals and address information necessary for operations on the storage unit and the operation execution unit based on the decoding result of the unit.

In such an information processing apparatus, when processing is performed by the program shown in FIG. 2, conventionally, the following operation is performed.

Referring to FIGS. 2 and 3, two roads (Loa
The data to be operated is read from the storage unit by the instruction d) and set in the registers S10 and S11 in the operation execution unit. The calculation (Mul) of multiplication S10 * S11 is started at the time of confirmation, and after the time required for this calculation has elapsed, this calculation result
Set to 2. Next, after waiting for the confirmation of the setting in the register S12, the store instruction of the operation result is executed, and then the update instruction of the index registers S0 and S1 is executed to complete the processing for one loop.

In such an operation, when the operation result is stored in the storage unit by the operation executing unit, if the operation result to be stored when the Store instruction is executed is unconfirmed, until the operation result is confirmed. The instruction control unit controls the execution of the corresponding Store instruction to wait. Therefore, even if an instruction to be executed next to the store instruction, for example, an add instruction, is an instruction that can be immediately executed regardless of the preceding store instruction, the store (store) instruction is executed.
e) Cannot be executed until the instruction is put into execution. Therefore,
If the execution time of the instruction that calculates the operation result to be stored by the Store instruction is long, there is a drawback that the instruction processing efficiency is significantly deteriorated.

It is an object of the present invention to provide an information processing apparatus which realizes speeding up of processing of the entire system by executing a subsequent instruction without waiting for an operation result confirmation in the instruction control unit.

The information processing apparatus according to the present invention includes a holding unit that holds an address and control information necessary for an undetermined calculation result storage process when storing a calculation result in a storage unit, and the above-mentioned holding unit. Detecting means for detecting the confirmation of the operation result corresponding to the address and control information, and in response to the detection result from this detecting means, the operation result storage address and control information corresponding to the confirmed operation result from the holding means. It is characterized in that the storage unit includes means for transmitting the result together with the corresponding calculation result.

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

Referring to FIG. 1, the system applied to the present invention is as follows.
A storage unit 1 for storing information such as an instruction, operated data, operation result data, etc., an operation execution unit 2, an instruction read from this storage unit 1 is decoded, and control information and an address as a decoding result are stored in the storage unit. 1 and an instruction control unit 3 for sending to the operation execution unit 2.

The calculation execution unit 2 temporarily stores data required for calculation,
A plurality of, for example, 128 register groups 21 shown as S0 to S127 to be used as a work area for storing intermediate calculation results, and a group of arithmetic units for performing arithmetic operations such as addition, subtraction, multiplication and division, logic and shift
22 to read the data to be operated from the storage unit 1 according to an instruction from the instruction control unit 3, set it in the register group 21 to execute the operation, and store the operation result in the storage unit 1 via the register group 21.
Send to.

The command control unit 3 decodes the command read from the address generation unit 7 and the command read from the storage unit 1 to generate control information based on the command read from the storage unit 1. It has a decryption unit 4. One of the features of the present invention is that the instruction control unit is divided into an arithmetic instruction control unit 5 and a storage unit access instruction control unit 6.

The operation instruction control unit 5 reads the data necessary for the operation from the register group 21 in the operation executing unit 2 by using the control information from the instruction decoding unit 4 and sends it to the operation unit group 22 or starts the operation to the operation unit group 22. Is issued, the execution state of the operation is monitored, and the information of the operation result confirmation is sent to the other functional unit. Based on the control information from the instruction decoding unit 4, the storage unit access instruction control unit 6 sends out control information related to the instruction for accessing the storage unit 1, in particular.

Another feature of the present invention is to have a store control stack 8. The store control stack 8 includes a register group 81 for temporarily storing control information and address information required for each instruction for storing a result of a certain operation in the storage unit 1, and an operation result confirmation information from the operation instruction control unit 5. When the operation result to be stored by the operation result storage instruction is unconfirmed, the control information and the address information required by the storage instruction are temporarily stored until the operation result is confirmed. When it is detected that the operation has been completed and the operation result has been determined by the unit 5, the information necessary for the corresponding storage instruction is selected from the control address information temporary storage register group and stored in accordance with the operation result data. And a selector 82 for sending to the unit 1.

Next, the operation of one embodiment of the present invention will be described using the example of FIG. 2 used in the description of the prior art with reference to FIG.

Referring to FIGS. 1, 2 and 4, the two load instructions of the first loop operation (Loop1) set the operand data in the registers S10 and S11 in the operation execution unit 2. It At time 5, the setting of both data in registers S10 and S11 is confirmed, and registers S10 and S1 are set.
The operation of multiplying the content of 1 and storing it in the register S12 is started.

Next, at time 6 when the Store instruction is given, the operation result to be stored in the register S12 is not set, so that the storage operation is not started at this point but is necessary for the storage operation. The control information and the address information are registered in the stack # 0 (SCC # 0) in the register group 81 of the store control stack 8.

After time 7, as if the Store instruction was executed, subsequent Add (Add), Multiply (Mul), and Branch (Jump) instructions are executed sequentially without waiting, and the second loop The operation (Loop2) is entered, and the load (Load) and load (Load) instruction processing proceeds. At time 18, multiply instruction (M) of the 1st loop operation (Loop1)
ul S12 ← S10 * S11) execution completion is detected by the operation instruction control unit 5, the control information and address necessary for storing the operation result temporarily stored in SCS # 0 in the register group 81 at time 6 Information is fetched from SCS # 0 and sent to the storage unit 1 together with the calculation result. 2nd loop operation (Loop2)
The same operation is performed thereafter.

Further, when the next operation result storage instruction comes and the corresponding operation is not fixed in the same manner while the control information and the address information for a certain operation result storing operation are not output from the store control stack 8, the above-mentioned operation is performed. Similar to the operation,
It operates to temporarily store the control information and address information of the store instruction in another register of the register group 81 in the store control stack 8.

If information is successively stored in the store control stack 8 in this way, the register group 81 may become full, but after a certain period of time, the corresponding operation result is confirmed and the register group 81 is stored. Therefore, by setting a certain number of registers in consideration of the execution time of the computing unit group 22, it is possible to avoid the situation where the processing is stopped because the register group 81 is full.

As described above, according to the present invention, when the operation result is stored in the storage unit by the subsequent instruction, the execution time of the operation is long,
If the operation result is not confirmed at the timing of executing the storage instruction, the operation result storage instruction is not kept waiting in the instruction control unit, but the address and control information necessary for the storage operation are temporarily stored until the operation result is determined. At the same time, by opening the instruction control unit, subsequent instructions are executed, and the storage instruction is stored based on the control information temporarily stored when the operation result of the operation instruction corresponding to the temporarily stored storage instruction is determined. Execution has the effect of reducing wasteful waiting for instruction execution and realizing efficient processing.

[Brief description of drawings]

FIG. 1 is a diagram showing a system including an embodiment of the present invention, FIG. 2 is a diagram showing an example of a program for arithmetic processing operation control, and FIG. 3 is a diagram for explaining the operation of a prior art, Fourth
The drawings are diagrams for explaining the operation of the present invention. Description of symbols of main parts 1 ... storage unit 2 ... operation execution unit 3 ... instruction control unit 4 ... instruction decoding unit 5 ... operation instruction control unit 6 ... storage unit access instruction control unit 7 ... address generation Part 8: Store control stack

Claims (1)

[Claims] 1. When storing an operation result in a storage unit, a holding means for holding an address and control information necessary for an undetermined operation result storage process, and the address and control information held in this holding means are stored in the holding means. Corresponding calculation result storage address and control information corresponding to the confirmed calculation result from the holding means to the storage unit in response to the detection result of detecting the confirmation of the corresponding calculation result. And a means for transmitting the calculation result together with the calculation result.