Instructions fun 081 rtl n bit rotate left – Toshiba 6F3B0253 User Manual
Page 177
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
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 Source
√
√
√
√
√
√
√
√
√
√
√
√
n Shift bits
1 - 16
B Destination
√
√
√
√
√
√
√
√
√
√
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)
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
1 0 1 0 0 1 1 1 0 0 1 1 1 0 1 0
CF
1
0 0 1 1 1 0 0 1 1 1 0 1 0 1 0 1
R002 is turned OFF
RW18
RW20 (Result)
∗
∗