JPS6059620B2 - Command control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a processing device having a plurality of instruction processing pipelines and a plurality of instruction control pipelines, in which one instruction processing pipeline is controlled by each of the plurality of instruction control pipelines. This relates to a command control method that allows independent control.

A processing device, such as a vector processor, has vector registers, multiple instruction processing pipelines, and multiple instruction control pipelines.

As the instruction processing pipeline, for example, an addition pipeline, a multiplication pipeline, a store pipeline, a load pipeline, etc. are provided. Store ■′
A pipeline is a pipeline for storing vector data in a vector register into main memory, and a load pipeline is a pipeline for reading vector data from main memory and storing it in a vector and a register. pipeline. FIG. 1 is a diagram illustrating the processing of elements in the instruction processing pipeline of a vector processor.

In Figure 1, the instruction processing pipeline is at processing stage a)
Nc) dNe... Also, for example, "'al" indicates element 1 in processing stage a,
``e2'' indicates element 2 at processing stage e. Elements 1, 2, 3, 4, 5, 6, . . . are input to the instruction processing pipeline, and each element is output through processing stages aNb) c) d) e, .
FIG. 2 shows the status of instruction execution in the instruction processing pipeline, and the pipeline processing is represented by a parallelogram as shown. FIG. 3 is a diagram illustrating a case in which three instructions of the same type are consecutive in the prior art.

In conventional vector processors, instruction control pipelines are provided in one-to-one correspondence with each of the addition pipeline, I-multiplication pipeline, store buffer, pipeline, and load pipeline. ,
Each instruction control pipeline is divided into stage 1, stage 2, and stage 3. In the instruction control pipeline that controls the addition pipeline and the multiplication pipeline, stage 1 controls reading elements from vector registers and sending them to the corresponding instruction processing pipeline, and stage 3 controls the instruction processing pipeline. Stage 2 performs control for writing elements output from the processing pipeline into vector registers, and stage 2 performs control between stage 1 and stage 3. Third
The figure shows the vibe line processing when three instructions of the same type, for example, addition instructions 1, 2, and 3, are sent sequentially to the addition instruction control P/F line.
is set to stage 1, and the element specified by instruction 1 is read from the vector register and input to the instruction processing vibe line. The element L inputted to the instruction processing vibe line is processed at the processing stage A. ．． b. ．． cld. The data are sequentially processed and output in e. After all of the elements specified in the instruction are read from the vector register and sent to the instruction processing vibe line, instruction 1 is set to stage 2 of the instruction control vibe line, and instruction 2 is set to stage 1 of the instruction control vibe line. is set to When the first output element based on instruction 1 is output from the instruction processing vibe line, instruction 1 is simultaneously moved to stage 3 of the instruction processing vibe line, instruction 2 is moved to stage 2, and instruction 3 is moved to stage 3 of the instruction processing vibe line. Set to stage 1. After all output elements based on instruction 1 have been written to the vector register, instruction 2 is moved to stage 3 of the instruction control vibe line and instruction 3 is moved to stage 2. After all output elements under instruction 2 have been written to the vector register, instruction 3 is moved to stage 3. The conventional system in which a dedicated instruction control vibe line is provided for each instruction processing vibe line has the disadvantage that play occurs in the instruction processing vibe line.

FIG. 4 is a diagram illustrating the play that occurs in the instruction processing vibe line. In FIG. 4, if we focus on instruction 2, we can see that even though the reading of the elements of instruction 2 by stage 1 of the instruction control vibe line is completed in a short time, instruction 1 continues to remain on the instruction control vibe line for a long time. Stage 2 of
Therefore, instruction 2 cannot move to stage 2 until stage 2 becomes vacant. When instruction 2 moves from stage 1 to stage 2 of the instruction control vibe line, instruction 3
can enter stage 1, but there is an idle time between the time when instruction 2 finishes reading the element and the time when instruction 3 starts reading the element. FIG. 5 is a diagram showing play in the instruction processing vibe line that occurs when a plurality of instructions of the same type are executed. As can be seen from FIG. 5, when instructions of the same type are executed consecutively, play in the instruction processing vibe line occurs between the end of execution of one instruction and the start of execution of the next instruction.
The present invention is based on the above considerations, and is designed to prevent play in the instruction processing vibe lines even when a plurality of instructions of the same type are consecutively issued in a processing device having multiple types of instruction processing vibe lines. The purpose is to provide a command control method. Therefore, the instruction control method of the present invention is capable of transmitting instruction information to any one of the instruction control systems in a processing device that has a plurality of instruction processing vibe lines that process vector instructions and a plurality of instruction control vibe lines that have a plurality of stages. A command information distributing means is provided to determine whether the command information is to be input to the vibe line, and a selector group consisting of the same number of selectors as the stages of the command control vibe line is provided for each instruction processing vibe line. The selector is characterized in that it is configured to input the outputs of the stages having the same number and to send the outputs of each selector to the corresponding instruction processing vibe line.The present invention will be described below with reference to the drawings. 6 is a block diagram of one embodiment of the main part of the present invention, and FIG. 7 is a time chart illustrating the operation of the apparatus shown in FIG.

In FIG. 6, 1 and 2 are instruction processing vibe lines, 3-
1 to 3-3 are stages of the command control vibe line, 4
-1 Inimi 4-3 is also the stage of command control vibe line,
5-1 to 5-3 are selectors, 6-1 to 6-3 are also selectors, and 7 is a selector, respectively.

The instruction processing vibe line 1 is, for example, an addition vibe line, and the instruction processing vibe line 2 is, for example, a multiplication vibe line.

When the command information instructs addition, the selector 7 selects the stage 3-1 or 3-3 side, and the stage 3-
The addition instruction information stored in stage 1 is sequentially transferred to stages 3-2,
The process moves to stage 3-3, and addition instruction information is input to instruction processing vibe line 1. When the instruction information indicates multiplication, the selector 7 selects stages 4-1, 4-2, and 4.
-3 side is selected, the multiplication information stored in stage 4-1 is sequentially transferred to stages 4-2 and 4-3, and multiplication instruction information is transferred to instruction processing vibe line 2. In the prior art, the instruction control vibe line consisting of stages 3-1 to 3-3 controls only the instruction processing vibe line 1, and the instruction control vibe line consisting of stages 4-1 to 4-3 controls only the instruction processing vibe line. It controlled only 2. According to the embodiment of FIG. 6, stages 3-1 to 3-
The instruction control vibe line consisting of stages 4-1 to 4-3 can control not only the instruction processing vibe line 1 but also the instruction processing vibe line 2, and the instruction control vibe line consisting of stages 4-1 to 4-3 can control only the instruction processing vibe line 2. In addition, the instruction processing vibe line 1 can also be controlled.
The operation of the embodiment shown in FIG. 6 in this regard will be explained with reference to FIG. In FIG. 7, it is assumed that instruction 1, instruction 2, instruction 3, and instruction 4 are all addition instructions.

In addition, control vibe A in FIG. 7 is stage 3-1.
means a command control vibe line consisting of 3-3,
Control vibe B means a command control vibe line consisting of stages 4-1 to 4-3. When the information of instruction 1 is input to the selector 7, the selector 7 selects the control vibe A.
The information of instruction 1 is sent to stage 3-1.
Set to 1. Information on instruction 1 is sent to instruction processing vibe line 1 via selector 5-1, and elements of instruction 1 are read from the vector register. When the reading of the elements of instruction 1 is completed, the information of instruction 1 is moved to stage 3-2 and sent to instruction processing vibe line 1 via selector 5-2. When the reading of the elements of the instruction 1 described above is completed, the selector 7 sends the information of the instruction 2 to the stage 4-1. Information on instruction 2 is set in stage 4-1 and sent to instruction processing vibe line l via selector 5-1. When the reading of the elements of the instruction 2 is completed, the information of the instruction 3 is set in the stage 3-1 via the selector 7, and sent to the instruction processing vibe line 1 via the selector 5-1. Instruction 2 above
When reading of the elements of is completed, the information of instruction 2 is moved to stage 4-2 and sent to instruction processing vibe line 1 via selector 5-2. When the output element of instruction 1 from instruction processing vibe line 1 starts to be output, the information of instruction 1 is moved to stage 3-3 and sent to instruction processing vibe line 1 via selector 5-3,
Also, since reading of the element of instruction 3 has been completed, the information of instruction 3 is moved to stage 3-2, and selector 5-
2 to the instruction processing vibe line 1. When reading of the elements of instruction 3 is completed, selector 7 sends information of instruction 4 to stage 4-1. Information on instruction 4 is sent to instruction processing vibe line 1 via selector 5-1. When the output element of instruction 2 starts to be output from instruction processing vibe line 1, the information of instruction 2 is transferred to stage 4.
-3, and the information of instruction 4 is transferred to stage 4-2 and sent to instruction processing vibe line 1 via selector 5-2. When the output element of instruction 3 starts to be output from instruction processing vibe line 1, the information of instruction 3 is moved to stage 3-3 and sent to instruction processing vibe line 1 via selector 5-3. Instruction processing vibe line 1
When the output element of instruction 4 starts to be output from , information on instruction 4 is moved to stage 4-3 and sent to instruction processing vibe line 1 via selector 5-3. Command 1,
A similar operation is performed when Instruction 2, Instruction 3, and Instruction 4 are multiplication instructions, but in this case, instruction information is sent to instruction processing vibe line 2. Although the above-mentioned embodiment has been explained by taking as an example the control of the vibration line of the arithmetic system, the present invention can also be applied to the control of the vibration line of the access system.

In other words, in the conventional system, a dedicated instruction control vibe line was provided for each of the store vibe line and the load vibe line, but the instruction control vibe line for controlling the store vibe line was used to control the load vibe line. It is possible to control the store vibe line using a command control vibe for controlling the load vibe line. As is clear from the above description, according to the present invention,
Even when instructions to the same instruction processing vibe line are consecutive, the play in the instruction processing vibe line is eliminated,
You can expect an improvement in processing speed.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the processing of elements in the instruction processing vibe line of a vector processor.

Claims (1)

[Claims] 1 In a processing device having multiple instruction processing pipelines that process vector instructions and multiple instruction control pipelines having multiple stages, instruction information distribution that determines which instruction control pipeline the instruction information is input to. In addition to providing means, a selector group consisting of the same number of selectors as the stages of the instruction control pipeline is provided for each instruction processing pipeline, and each of the selectors is inputted with the output of the stage with the same number of the instruction control pipeline. An instruction control method characterized in that the output of the selector can be sent to the corresponding instruction processing pipeline.