JPS6488628A - Exception processor - Google Patents
Exception processorInfo
- Publication number
- JPS6488628A JPS6488628A JP62244933A JP24493387A JPS6488628A JP S6488628 A JPS6488628 A JP S6488628A JP 62244933 A JP62244933 A JP 62244933A JP 24493387 A JP24493387 A JP 24493387A JP S6488628 A JPS6488628 A JP S6488628A
- Authority
- JP
- Japan
- Prior art keywords
- arithmetic
- processing
- outputs
- exception
- unnecessary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To simplify a microprogram necessary for a pre-processing by executing hardware-wise the detection and processing (determination of calculation result) of an exception item in a pre-processing by a numerical arithmetic processor by means of an exception decoder. CONSTITUTION:At the time of pre-processing for arithmetic operation of the numerical arithmetic processor, tags 12, 13 representing the attributes of arithmetic data are inputted to the exception decoder 11 which determines a decoding pattern depending on the kind of the arithmetic operation. The decoder 11, in case the arithmetic processing is unnecessary, outputs an arithmetic processing unnecessary flag, and at the same time outputs selection signals corresponding to the inputted tags 12, 13 and an instruction register 14. In an output means, various constants to be used in an arithmetic output, as well as data to be operated, are stored. The output means, in case of an arithmetic processing is unnecessary is represented by the arithmetic processing unnecessary flag, selects one of the stored arithmetic outputs by the instruction of the selection signal, and outputs it. As a result, the microprogram of a pre-processing in which an exception item is processed can be simplified.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244933A JPH07120266B2 (en) | 1987-09-29 | 1987-09-29 | Exception handling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244933A JPH07120266B2 (en) | 1987-09-29 | 1987-09-29 | Exception handling device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6488628A true JPS6488628A (en) | 1989-04-03 |
JPH07120266B2 JPH07120266B2 (en) | 1995-12-20 |
Family
ID=17126125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62244933A Expired - Lifetime JPH07120266B2 (en) | 1987-09-29 | 1987-09-29 | Exception handling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07120266B2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6045844A (en) * | 1983-08-24 | 1985-03-12 | Hitachi Ltd | Arithmetic unit |
JPS60136832A (en) * | 1983-12-26 | 1985-07-20 | Hitachi Ltd | Logical type data processor for handling data having tag |
JPS61288226A (en) * | 1985-06-17 | 1986-12-18 | Panafacom Ltd | External condition control system |
JPS6232536A (en) * | 1985-08-06 | 1987-02-12 | Fujitsu Ltd | System for correcting result of coded binary division and for detecting abnormally |
JPS6347827A (en) * | 1986-08-15 | 1988-02-29 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Valid response generator |
-
1987
- 1987-09-29 JP JP62244933A patent/JPH07120266B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6045844A (en) * | 1983-08-24 | 1985-03-12 | Hitachi Ltd | Arithmetic unit |
JPS60136832A (en) * | 1983-12-26 | 1985-07-20 | Hitachi Ltd | Logical type data processor for handling data having tag |
JPS61288226A (en) * | 1985-06-17 | 1986-12-18 | Panafacom Ltd | External condition control system |
JPS6232536A (en) * | 1985-08-06 | 1987-02-12 | Fujitsu Ltd | System for correcting result of coded binary division and for detecting abnormally |
JPS6347827A (en) * | 1986-08-15 | 1988-02-29 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Valid response generator |
Also Published As
Publication number | Publication date |
---|---|
JPH07120266B2 (en) | 1995-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071220 Year of fee payment: 12 |