6F3B0253
7. Instructions
FUN 069
SHL1
1 bit shift left
Expression
Input − [ SHL1 A ]− Output
Function
When the input is ON, the data of register A is shifted 1 bit to the left (MSB direction). 0 is stored in the right most bit (LSB). The pushed out bit state is stored in the carry flag (CF = S050). After the operation, if the left most bit (MSB) is ON, the output is turned ON.
Execution condition
Input |
| Operation | Output | CF |
OFF | No execution | OFF | − | |
ON | Execution | When MSB = 1 | ON | Set or reset |
|
| When MSB = 0 | OFF | Set or reset |
Operand
| Name |
|
| Device |
|
|
|
|
|
| Register |
|
|
|
|
| Constant | Index | ||
|
| X | Y | R | S | T. | C. | XW | YW | RW | SW | T | C | D | I |
| J | K |
|
|
A | Operation data |
|
|
|
|
|
|
| √ | √ | √ √ | √ | √ | √ | √ | √ |
|
| √ |
|
Example
When X008 is changed from OFF to ON, the data of RW15 is shifted 1 bit to the left. The figure below shows an operation example.
CF
1
(MSB) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| (LSB) |
| |||||
| F E D C B A 9 8 7 6 5 4 3 2 1 0 |
| ||||||||||||||||||||
| 1 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 |
| 0 |
| RW15 | ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| RW15 (Result) | ||
| 1 |
| 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 |
| 0 |
| |||
|
|
|
|
|
|
| R002 is turned ON |
|
|
|
|
| 0 |
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
Basic Hardware and Function 165
