JPS5487446A - Data processor - Google Patents
Data processorInfo
- Publication number
- JPS5487446A JPS5487446A JP15595377A JP15595377A JPS5487446A JP S5487446 A JPS5487446 A JP S5487446A JP 15595377 A JP15595377 A JP 15595377A JP 15595377 A JP15595377 A JP 15595377A JP S5487446 A JPS5487446 A JP S5487446A
- Authority
- JP
- Japan
- Prior art keywords
- data
- floating
- point data
- log
- transform processing
- 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.)
- Pending
Links
Abstract
PURPOSE: To extend the range of numeric data by equipping a data processor which processes floating-point data with a logarithm transform processing part converting floating-point data into logarithms and by performing a process by the logarithm floating-point data of the floaing-poing data.
CONSTITUTION: When two kinds of floating-point data X and Y and two kinds of logarithmic-value floating data (log x) and (log y) are given, their operand data are set to registers 1 and 2 respectively and converted by logarithm transform processing parts 2 and 3 inverse transform processing parts 5 and 6 into pieces of data X and Y, and (log x) and (log y) which are inputted to arithmetic circuit part 8. This arithmetic circuit part 8 is provided with floating-point data arithemetic circuit 9, logarithmic-value floating-point data arithmetic circuit 10 and overflow detection part 11 detecting an overflow, so that gates 19 and 20 will be controlled when an overflow or underflow occurs.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15595377A JPS5487446A (en) | 1977-12-23 | 1977-12-23 | Data processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15595377A JPS5487446A (en) | 1977-12-23 | 1977-12-23 | Data processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5487446A true JPS5487446A (en) | 1979-07-11 |
Family
ID=15617129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15595377A Pending JPS5487446A (en) | 1977-12-23 | 1977-12-23 | Data processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5487446A (en) |
-
1977
- 1977-12-23 JP JP15595377A patent/JPS5487446A/en active Pending
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