JPH01191948A - Diagnosis controller - Google Patents

Abstract

PURPOSE:To improve the operating efficiency of a diagnosis by using a detecting means which detects a conditional branch and a stop means which stops the execution of a microprogram after execution of the conditional branch. CONSTITUTION:When a decoding circuit 5 detects that a microprogram to be executed shows a conditional branch, a clock control circuit 8 stops clock action in a step following the execution of the conditional branch and then stops the execution of the microprogram. As a result, the branch can be confirmed by the result of one diagnosis for the conditional branch part when the executing path of the microprogram is traced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diagnostic control device, and more particularly to a diagnostic control device that traces the execution processing of a microprogram in an information processing device.

Conventionally, the diagnostic processing methods used in information processing equipment include a step operation that advances the microprogram one step at a time, and an address stop operation that stops execution of the microprogram after executing it up to the address of the target microprogram. There was a method to trace the execution path of a microprogram using

In other words, when tracing the execution path of a microprogram, if there is a conditional branch on the way, the address of the microprogram of the conditional branch is investigated, and based on this investigation, the address of the microprogram of the conditional branch is determined by using an address stop operation. The conditional branch microprogram step is then executed by using a step operation.

After confirming which direction the program will take depending on the condition of the conditional branch, a method is used in which the execution path of the microprogram is continued to be traced.

In such conventional diagnostic processing methods, when tracing the execution path of a microprogram, if there is a conditional branch in the middle, the conditional branch's micro This requires two operations: investigating the program address, executing an address stop operation to the conditional branch address to advance the microprogram address, and then executing one step operation to advance to the branch destination address. , poor operability;
The disadvantage is that the diagnostic operation is inefficient.

1. Additional information The present invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is possible to execute branch confirmation of the conditional branch part of a microprogram with a single diagnostic operation, and to simplify the diagnostic operation. The purpose of the present invention is to provide a diagnostic control device that can improve efficiency.

A diagnostic control device according to the present invention is a diagnostic control device that traces execution processing of a microprogram in an information processing device, and includes a detection means for detecting a conditional branch in the microprogram, and a detection means for detecting a conditional branch in the microprogram. and stopping means for stopping the execution process of the microprogram after execution of the conditional branch detected by, and the branch confirmation of the conditional branch is performed by stopping the execution process of the microprogram by the stopping means. It is characterized by

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. A decode circuit 2 for decoding, a memory circuit 3 for storing a macro program, a micro program register 4 for storing a micro program read from the memory circuit 3, and a micro program output from the micro program register 4 are conditional branches. a decoding circuit 5 that decodes whether or not a Clock control circuit 8 that controls the lock
It is composed of:

Diagnostic command 10 from diagnostic control circuit 1 to decode circuit 2
1 is sent, the decoding circuit 2 decodes this diagnostic command 101, and when this diagnostic command 101 is a conditional branch stop operation, the conditional branch stop operation signal 10 is sent.
4 becomes "1" and is output to the AND circuit 6.

When the diagnostic command 101 is a step operation, the step operation signal 105 becomes 1'' and is output to the clock control circuit 8.0 When the diagnostic command 101 is a normal operation, the conditional branch stop operation signal 104 and the step operation signal 105 Both are "0".

The diagnostic control circuit 1 sends a clock start signal 102 and a clock stop signal 103 to the clock control circuit 8, and the clock control circuit 8 controls the operation of the clock.

In the clock control circuit 8, when the clock start signal 102 from the diagnostic control circuit F#11 becomes "1", the clock inhibit signal 111 becomes "0" and starts clock operation.

Further, the clock control circuit 8 receives a clock stop signal 103 from the diagnostic control circuit 1, a step operation signal 105 from the decoding circuit 2, and an output signal 110 from the flag 7.
When any one of them becomes "1", the clock inhibit signal 111 becomes "1" and is output, and the clock operation is stopped.

When the diagnostic command 101 from the diagnostic control circuit 1 is a conditional branch stop operation, the conditional branch stop operation signal 104 from the decode circuit F#12 becomes "1", and the microprogram is read word by word from the memory circuit #I3. , signal line 106
The data is sent to the microprogram register 4 via the microprogram register 4 and stored therein.

The microprogram stored in the microprogram register 4 is sent to an information processing device (not shown) and a decoding circuit 5 via a signal line 107.

The decode circuit 5 decodes the microprogram sent from the microprogram register 4, and if this microprogram has a conditional branch, the conditional branch signal 1
08 becomes "1" and is output to the AND circuit 6.

In the AND circuit 6, when the conditional branch stop operation signal 104 from the decode circuit 2 is "1" and the conditional branch signal 108 from the decode circuit 5 becomes "1", an output signal 109 is generated.
becomes "1" and is output to flag 7.

When a conditional branch of the microprogram from microprogram register 4 is executed, 7
The output signal 109 from the AND circuit 6 causes “
1” is set.

When the flag 7 is set to "1", the output signal 110 from the flag 7 becomes 1' and is output to the clock control circuit 8, and the clock control circuit 8 outputs the clock in response to the output signal 110 from the flag 7. The prohibition signal 111 becomes 1'' and is output, and the clock operation is stopped. This makes it possible to check the conditional branch of the microprogram after branching.

When the microprogram stored in the microprogram register 4 is not a conditional branch, the decoding circuit 5
Since the conditional branch signal 108 output from the AND circuit 6 becomes "0", the output signal 109 from the AND circuit 6 becomes "0",
Flag 7 is set to "0".

The clock control circuit 8 has “0” set in the flag 7.
is input as the output signal 110, so unless the clock stop signal 103 from the diagnostic control circuit 1 becomes "1", the clock disable signal 111 output from the clock control circuit 8 is kept at "0", and the micro Program execution processing continues.

When the diagnostic command 101 from the diagnostic control circuit 1 is a step operation, the clock control circuit 8 is sent from the decode circuit 2 to the clock control circuit 8.
The step operation signal 105 becomes "1"',
In the clock control circuit 8, when the clock start signal 102 from the diagnostic control circuit 1 becomes "1", the clock inhibit signal 111 is temporarily set to "0", but when the step operation signal 105 from the decoding circuit 2 becomes "1", Therefore, after the clock is output once, the clock inhibit signal 111 becomes 1'' again, and the operation of the clock is stopped.

In this way, when the decode circuit 5 detects that the microprogram to be executed is a conditional branch, the clock control circuit 8
By stopping the clock operation and stopping the microprogram execution process, it is possible to check the conditional branch part in one diagnostic operation when tracing the execution path of the microprogram. This can improve the efficiency of diagnostic operations.

As described above, according to the present invention, when tracing the execution process of a microprogram in an information processing device, when a conditional branch is detected in this microprogram, the microprogram is executed after the execution of the conditional branch. By stopping the program execution process 7, branch confirmation of the conditional branch part of the microprogram can be executed in a single diagnostic operation, which has the effect of improving the efficiency of the diagnostic operation. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Explanation of symbols of main parts 1...Diagnosis control circuit 2.5...Decoding circuit 6...Logic product circuit 7...Flag 8...・Clock control circuit

Claims (1)

[Claims] (1) A diagnostic control device that traces execution processing of a microprogram in an information processing device, the detection unit detecting a conditional branch in the microprogram;
stopping means for stopping the execution processing of the microprogram after execution of the conditional branch detected by the detection means, and checking the branching of the conditional branch by stopping the execution processing of the microprogram by the stopping means. A diagnostic control device characterized by: