6F3B0250
Basic Hardware and Function 185
7. Instructions

FUN 071 SHL n bit shift left

Expression
Input -[
A
SHL
n
®
B
]- Output
Function
When the input is ON, the data of regist er
A
is shift ed
n
bits to the left (MSB direction) including t he
carry flag (CF = S050), and stored in
B
. 0 is stored in lower
n
bits. 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 Re
g
ister Constant Index
X Y R S T. C. XW YW RW SW T C D I J K
A
Source ÖÖÖÖÖÖÖÖÖÖ Ö Ö
n
Shift bits 1 - 16
B
Destination ÖÖÖÖÖÖÖÖÖ Ö
Example
When X 008 is changed from O FF to ON, the data of RW18 is shifted 3 bits t o the left and t he
result is st or ed in RW20.
The figure below shows an operation example.
(MSB) (LSB)
FEDCBA9876543210
1010011100111010
CF
1 0011100111010000
R002 is turned OFF 0
RW18
RW20 (Result)
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