6F3B0253
Basic Hardware and Function 173
7. Instructions
FUN 079 RTL1 1 bit rotate left
Expression
Input −[ RTL1 A ]− Output
Function
When the input is ON, the data of register A is rotated 1 bit to the left (MSB direction). The pushed
out bit state is stored in the right most bit (LSB) and 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. XWYWRWSW T C D I J K
A Operation data
√√√√√√√√√ √
Example
When X008 is changed from OFF to ON, the data of RW15 is rotated 1 bit to the left.
The figure below shows an operation example.
(MSB) (LSB)
FEDCBA9876543210
1110011100111010
CF
1 1100111001110101
R002 is turned ON
RW15
RW15 (Result)
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