6F3B0253
Basic Hardware and Function 175
7. Instructions
FUN 081 RTL n bit rotate left
Expression
Input [ A RTL n B ] Output
Function
When the input is ON, the data of register A is rotated n bits to the left (MSB direction), and stored
in B. After the operation, if the left most bit (MSB) is ON, the output is turned ON.
Execution condition
Input Operation O utput CF
OFF No execution OFF
ON Ex ecution W hen 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
ASource √√√√√√√√√√ √
nShift bits 1 - 16
BDestination √√√√√√√√√ √
Example
When X008 is changed from OFF to ON, the data of RW18 is rotated 3 bits to the left and the
result is stored in RW20.
The figure below shows an operation example.
(MSB) (LSB)
FEDCBA9876543210
1010011100111010
CF
1 0011100111010101
R002 is turned OFF
RW18
RW20 (Result)