JPH0397734U - - Google Patents
Info
- Publication number
- JPH0397734U JPH0397734U JP450390U JP450390U JPH0397734U JP H0397734 U JPH0397734 U JP H0397734U JP 450390 U JP450390 U JP 450390U JP 450390 U JP450390 U JP 450390U JP H0397734 U JPH0397734 U JP H0397734U
- Authority
- JP
- Japan
- Prior art keywords
- micro
- exponent
- rom
- holds
- arithmetic unit
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の一実施例によるマイクロプ
ロセツサをしめすブロツク図、第２図は従来例の
マイクロプロセツサをしめすブロツク図である。
２……マイクロプログラムを格納するマイクロ
プロＲＯＭ、３……マイクロプログラムカウンタ
、４−５……仮数部演算器、６……指数部加算器
、１０……指数部オーバーフロウ処理ルーチンの
マイクロエントリを保持するレジスタ、１１……
判定回路である。なお、各図中同一符号は同一ま
たは相当部分をしめす。
FIG. 1 is a block diagram showing a microprocessor according to an embodiment of this invention, and FIG. 2 is a block diagram showing a conventional microprocessor. 2... Micro program ROM for storing microprograms, 3... Micro program counter, 4-5... Mantissa arithmetic unit, 6... Exponent adder, 10... Micro entry for exponent overflow processing routine. Registers to hold, 11...
This is a judgment circuit. Note that the same reference numerals in each figure indicate the same or equivalent parts.
Claims (1)
において、マイクロプログラムを格納するマイク
ロＲＯＭと、このマイクロＲＯＭの出力によつて
動作が制御される仮数部演算器と、これと同時に
動作する指数部加算器と、マイクロＲＯＭのアド
レスを保持するマイクロプログラムカウンタと、
指数部オーバーフロウ処理のマイクロエントリを
保持するレジスタと、上記の指数部加算器の結果
が指数部オーバーフロウである場合にマイクロプ
ログラムカウンタの入力を指数部オーバーフロウ
処理のマイクロエントリに切り換える判定回路と
を備えたマイクロプロセツサ。 A microprocessor that executes floating point operations includes a micro ROM that stores a micro program, a mantissa arithmetic unit whose operation is controlled by the output of the micro ROM, and an exponent adder that operates simultaneously with the mantissa arithmetic unit. a micro program counter that holds the address of the micro ROM;
a register that holds a micro entry for exponent overflow processing, and a determination circuit that switches the input of the microprogram counter to the micro entry for exponent overflow processing when the result of the exponent adder is an exponent overflow. A microprocessor equipped with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP450390U JPH0397734U (en) | 1990-01-22 | 1990-01-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP450390U JPH0397734U (en) | 1990-01-22 | 1990-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397734U true JPH0397734U (en) | 1991-10-08 |
Family
ID=31508247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP450390U Pending JPH0397734U (en) | 1990-01-22 | 1990-01-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397734U (en) |
-
1990
- 1990-01-22 JP JP450390U patent/JPH0397734U/ja active Pending
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