JPH0283619A - Random data generation circuit - Google Patents

Abstract

PURPOSE:To generate random data of desired radix by providing a random number generating means which generates random number data consisting of a binary number with prescribed number of bits, a control information storage means which stores control information to designate the desired radix, and a conversion means which converts the random number data to the random number of desired radix based on the control information. CONSTITUTION:The random number generating means 111 generates the random number data consisting of the binary number with prescribed number of bits, and the control information storage means 121 stores the control information to designate the desired radix, and the conversion means 131 converts the random number data to the random number of desired radix based on the control information stored in the control information storage means 121. In other words, the random number data generated by the random number generating means 111 is introduced to the conversion means 131, and the random number data is converted to the random number of desired radix by the conversion means 131 based on the control information stored in the control information storage means 121. In such a way, it is possible to obtain the random number of desired radix designated by the control information based on the random number data of binary number with the prescribed number of bits.

Description

[Detailed Description of the Invention] [Summary] A random data generation circuit, which aims to generate random data of a desired base number, comprises a random number generation means for generating random number data consisting of a binary number of a predetermined number of bits, and a desired number of base numbers. a control information storage means for storing control information specifying a base number; and a conversion means for converting random number data into random numbers of a desired base number based on the control information stored in the control information storage means. do.

The invention also includes a plurality of random number generation means, a plurality of control information storage means corresponding to each of the plurality of random number generation means, and a plurality of conversion means corresponding to each of the plurality of random number generation means. Configure to generate random numbers.

[Industrial application field]

The present invention relates to a random data generation circuit, and particularly to a random data generation circuit that generates random numbers of a desired base number.

[Conventional technology]

In an arithmetic processing device such as a computer, it is necessary to confirm whether the circuit of the arithmetic processing device operates normally.

In order to perform this kind of confirmation, the arithmetic processing unit is
A commonly used method is to run a program for ~ and check the processing results. Here, if a test program is executed using data created in advance, some circuits of the arithmetic processing device may never operate.

By the way, if a sufficiently large number of random number data are used, it is considered that all the circuits of the arithmetic processing device operate at least once. However, generating random numbers using software slows down processing time, which reduces the amount of data that can be generated and processed in a given period of time. On the other hand, if a random number generation circuit is used, a large amount of data can be generated and processed within a certain period of time.

FIG. 4 shows the configuration of a conventional random number generation circuit.

The 4-bit counter 401 counts the introduced clock signals and outputs the counting results to output terminals OA, O! 10°, 0. Output to.

Output terminal 0 of the random number generation circuit. ．． 0. are connected to output terminals OA and OI of the 4-bit counter 401. 4
The output terminal On of the bit counter 401 is connected to the output terminal 03 of the random number generation circuit, and the output terminal Oc is connected to the output terminal 0
Connected to 4.

In this way, pseudo random numbers "OH" to "FH"'("H" is a subscript representing a hexadecimal number) are generated.

[Problem to be solved by the invention]

By the way, in the test program mentioned above, ′
There is an instruction that requires test data of decimal random numbers with a base number of 0° to 9′. When data other than a decimal number is input as operand data for such an instruction, the arithmetic processing unit recognizes a data exception and does not perform normal arithmetic processing. A 4-bit random number corresponding to a hexadecimal number is generated.

For this reason, even if test data of decimal random numbers is required, data that would cause the arithmetic processing unit to recognize a data exception (for example, "'AH" to "F H'") may also be input. , there is a problem in that the probability of such occurrence is large, so that it is not possible to sufficiently test the case of performing normal arithmetic processing operations.

The present invention was created in view of these points, and an object of the present invention is to provide a random data generation circuit that generates random numbers of a desired base number.

[Means to solve the problem]

FIG. 1(A) is a block diagram of the principle of the random data generation circuit of the first invention.

In the figure, random number generation means 111 has a predetermined number of bits.
Generates random number data consisting of base numbers.

The control information storage means 121 stores control information specifying a desired radix.

The conversion means 131 converts the random number data into a random number of a desired base number based on the control information stored in the control information storage means 121.

Figure 1 (B) is a block diagram of the principle of the random data generation circuit of the second invention.

In the figure, a plurality of random number generating means 111 generate random number data consisting of binary numbers of a predetermined number of bits.

The plurality of control information storage means 121 corresponds to each of the plurality of random number generation means 111, and stores control information specifying a desired radix.

The plurality of conversion means 131 correspond to each of the plurality of random number generation means 111, and convert the corresponding random number data into a random number of a desired base number based on the control information stored in the corresponding control information storage means 121.

Therefore, the system is configured to generate a desired random number of multiple digits as a whole.

[For production]

The random number data generated by the random number generation means 111 is
This random number data is introduced into the conversion means 131, and is converted into a random number of a desired base by the conversion means 131 based on the control information stored in the control information storage means 121.

In the present invention, a random number of a desired base specified by control information is obtained based on binary random number data of a predetermined number of bits.

Further, a plurality of random number generation means 111. Control information storage means 1
21. By operating the conversion means 131 in parallel,
A desired random number with multiple digits can be obtained at once.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 shows the configuration of the random data generation circuit in the first embodiment.

FIG. 3 shows the configuration of a random data generation circuit in the second embodiment.

(1) Here, the correspondence between the embodiment of the present invention and FIG. 1 will be shown.

The random number generation means 111 corresponds to the random number generation sections 201 and 301.

The control information storage means 121 has a control information register 202.
This corresponds to 302.

The conversion means 131 corresponds to the conversion circuits 203 and 303.

Examples of the present invention will be described below assuming that the correspondence relationship as described above exists.

In Table 2.1 and Figure 2, the control information register 202 has eight storage areas CO each storing 2-bit control information.
, C1, C2, C3, C4, C5, C6, and C7.

Table 1 shows this 2-bit control information, its abbreviation, and the radix specified by the control information.

Table 1 Here, the base ゛A specified by the control information of the abbreviation S
``F'' to ``F'' have the meaning of a sign ``pa+'' or ``pa-pa'' indicating the positive or negative decimal number, respectively. Table 2 shows the symbols meant by the base numbers "A" to "F".

The data register 206 has eight storage areas each storing 4-bit random data.

DI, D2. D3. D4. D5. D6. It is divided into D7.

Each of the storage areas C0 to C7 of the control information register 202 and the storage areas DO to D7 of the data register 206 correspond to each other. For example, random data of the radix specified in the storage area CO of the control information register 202 is stored in the storage area DO of the data register 206.

The control unit 205 controls selection of control information by the selection circuit 204 by specifying one of the storage areas CO to C7 of the control information register 202 to the selection circuit 204.

The control information selected by the selection circuit 204 is introduced into the conversion circuit 203.

The random number generation unit 201 generates a 4-bit random number (“OH゛～“”
This 4-bit random number is introduced into the conversion circuit 203.

The conversion circuit 203 transfers this 4-bit random number to the selection circuit 2.
It is converted into random data of the base number indicated by the control information selected by 04.

Table 3 shows the random numbers (4 vias) output from the random number generator 201, and
It shows the correspondence with the output random data.

In Table 3, "r input data" is a 4-bit random number generated by 201. Here, each Pino I- of the input data is 83. az, a+.

It is called ao.

Further, the control information is indicated by the abbreviations shown in Table 1.

(Margin below this page) Table 3 Here, for example, storage area C of the control information register 202
o-C6 stores control information ``01'', an abbreviation that specifies a decimal number, and storage area C7 stores control information ``10'', an abbreviation S that specifies a code. shall be.

For example, the selection circuit 204 selects the control information register 20
When storage area CO 2 is selected, control information “01” indicated by an abbreviation is introduced into the conversion circuit 203.

At this time, the 4-bit random number data (for example, "1011") generated by the random number generator 201 is sent to the conversion circuit 20.
3, it is converted into decimal random data "3" (see Table 3).

Further, the control unit 205 specifies the storage area DO of the data register 206 corresponding to the storage area CO of the control information register 202 selected by the selection circuit 204, and controls writing of random data output from the conversion circuit 203.

In this way, the storage area C of the control information register 202
Random data of the base number specified in O (for example, lO base number) is written to the storage area Do of the data register 206.

Similarly, storage areas C1 to C1 of the control information register 202
C7 is selected one after another, and the conversion circuit 203 converts the random number data generated by the random number generation unit 201. As a result, random data of the radix specified in the storage areas 01 to C7 of the control information register 202 is written to the storage areas D1 to D7 of the data register 206.

As described above, 4-bit×8-digit random data can be obtained in the data register 206. here,
In the storage areas DO to D6 of the data register 206, decimal random data specified by the control information indicated by the abbreviation is obtained, and in the storage area D7, positive or random data specified by the control information indicated by the abbreviation S is obtained. A negative sign is obtained.

(2) and FIG. 3 show the configuration of a random data generation circuit according to a second embodiment of the present invention.

The control information register 302 is 1. Storage areas Ca, Cb, Cc, CdCe, Cf, each storing 2-bit control information.
It is formed by Cg and Ch, and these control information are
Each conversion circuit 303a.

303b 303c 303d 303e, 30
It has been introduced in 3f, 303g, and 303h.

Random number generators 301a, 301b, 30ic, 301, d
, 301e, 301f, 301g, and 301h each generate a 4-bit random number, and these random numbers are used by conversion circuits 303a, 303b, 303c, and 303d, respectively.
It is input to 03e, 303f, 303g, and 303h.

As described above, each of the conversion circuits 303a to 303h simultaneously converts input data of 4-bit random numbers into random data of a designated radix.

In this way, 8-digit random data of the desired radix is obtained.

Dear N-Yu JEfl, In the embodiment of the present invention described above, a case was considered in which a 4-bit binary random number was converted into random numbers of four types of radix, but the conversion circuit 203 and the conversion circuit 303 There are no restrictions on the number of bits of input random number data or the type of radix to be converted. Furthermore, there is no limit to the number of digits of the random number that can be obtained.

Furthermore, in "1. Correspondence between Examples and FIG. 1",
Although the correspondence between the present invention and the embodiments has been described, those skilled in the art will easily assume that the present invention is not limited to this and that there are various modifications.

[Effects of the Invention] As described above, according to the present invention, random numbers of a desired base number can be obtained by converting binary random number data of a predetermined number of bits. This desired random number can be used, for example, as test data in an operation test of an arithmetic processing device, so it is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the rung 1 data generation circuit of the present invention. FIG. 2 is a block diagram of the random data generation circuit according to the first embodiment of the present invention. FIG. 3 is a block diagram of the random data generation circuit according to the first embodiment of the present invention. 1. Block diagram of random data generation circuit FIG. 4 is a block diagram of a conventional random number generation circuit. In the figure, 111 is a random number generation means, 121 is a control information storage means, 131 is a conversion means, 201.301 is a random number generation section, 202.302 is a control information register, 203.303 is a conversion circuit, 204 is a selection circuit, 205 206 is a data register, and 401 is a counter.　　　　　　　　　　1.77　Figure 1 (A)　　　　　　　　1.7　Figure 1 (A)　　　　　　　1,7　Figure CB

Claims (2)

[Claims] (1) Random number generation means (111) that generates random number data consisting of binary numbers of a predetermined number of bits; Control information storage means (121) that stores control information specifying a desired radix; Control information storage means (121) ); converting means (131) for converting the random number data into random numbers of a desired base number based on control information stored in the random data generating circuit. (2) A plurality of random number generation means (111) that generate random number data consisting of binary numbers of a predetermined number of bits, and control information that specifies a desired radix corresponding to each of the plurality of random number generation means (111). A plurality of control information storage means (
121), and the corresponding control information storage means (121) corresponding to each of the plurality of random number generation means (111).
) a plurality of converting means (
131); and a random data generation circuit configured to generate the desired random number of multiple digits.