JPH04147350A - Microprogram step appearance frequency counting method - Google Patents

Abstract

PURPOSE:To count the number of times of the appearance of an arbitrary program step and to measure the frequency of passing of a plurality of paths by storing an address of microprogram whose frequency of appearance needs to be counted in a compare address register. CONSTITUTION:A compare address register 1 holds an address to be compared with an execution address signal 10. Further, a compare coincidence detecting section 2 compares an execution address signal 10 of microprogram with the content held by the compare address register 1. When compared values coincide with each other, a coincidence signal 11 is issued. The aforementioned action is repeated for the execution of every instruction of the microprogram. On the other hand, a compare and coincidence frequency register 3 is set at 0 as initial value, and every time a coincidence signal is received, 1 is added by a coincidence frequency update section 4 to update the register, thereby counting the number of times of the occurrence of coincidence output from the coincidence signal 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for counting the number of occurrences of microprogram steps.

[Conventional technology]

Conventionally, the number of appearances of a microprogram step is counted by adding a counting microprogram routine before and after the microprogram step to be counted.

[Problem to be solved by the invention]

In the conventional microprogram step appearance counting method described above, it is necessary to add a microprogram routine for counting to the counting step in the microprogram, so it is necessary to increase the control memory capacity and perform counting. This method has a drawback in that it is difficult to arbitrarily count the number of times a microprogram step appears, since this will result in a decrease in the performance of the path passing through the steps.

[Means to solve the problem]

The microprogram step appearance count method of the present invention compares the execution address and the comparison address with a comparison address register in which a comparison address to be compared with the execution address of the microprogram is set, and when they match, the comparison is performed. a comparison match detection unit that outputs a match signal; a comparison match count register that holds the number of comparison matches between the execution address and the comparison address; and a match count update unit that updates the comparison match count register in response to the comparison match signal. It is characterized by having the following.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of the microprogram step appearance counting method of the present invention, which is a part of an information processing device that sequentially retrieves and executes instruction words constituting a microprogram stored in a control storage device. It is.

In FIG. 1, a comparison address register 1 holds a comparison address to be compared with an execution address signal 10.

Further, the comparison match detection section compares the execution address signal [0] of the microprogram with the content held in the comparison address register 1, and outputs a comparison match signal 11 when they match. The above operations are repeated every time one instruction of the microprogram is executed.

On the other hand, the comparison match count register 3 is set to 0 as an initial value, and each time the comparison match signal 11 is received, the match count update section 4 adds 1 to update the match count, thereby outputting the comparison match signal 11. The number of matches is counted.

Next, the operation of this embodiment will be explained.

The address of the microprocessor program whose number of appearances is to be counted is set in the comparison address register 1, and the program to be counted is executed. Every time the instruction words of the microprogram are taken out sequentially, the execution address signal 10 and the comparison address held in the comparison address register 1 are compared in the comparison match detection section 2, and each time there is a match, a comparison match signal 11 is used to indicate a comparison match. The contents of the number of times register 3 are incremented by one by the matching number updating section. When the execution of the program to be counted is completed, the number of occurrences of the microprogram step to be counted is held in the comparison match register 3.

〔Effect of the invention〕

As explained above, since the present invention can be counted without changing the microprogram, it is easy to count the number of occurrences of an arbitrary microprogram step, and the number of occurrences of an arbitrary microprogram step can be easily counted. It has the effect of being extremely effective as a means of measuring frequency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Comparison address register, 2... Comparison match detection unit, 3... Comparison match count register, 4... Match count update unit, 10... Execution address signal, 11... Comparison match signal .

Claims (1)

[Claims] A comparison address register in which a comparison address to be compared with an execution address of a microprogram is set, and a comparison that compares the execution address and the comparison address and outputs a comparison match signal when they match. A match detecting unit, a comparison match count register that holds a comparison match count between the execution address and the comparison address, and a match count update unit that updates the comparison match count register in response to the comparison match signal. A method for counting the number of microprogram step appearances.