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6F3B0250
Basic Hardware and Function
251
7. Instructions
FUN 183 DNEG Double-word 2’s complement
Expression
Input
-
[
A+1
×
A
DNEG
B+1
×
B
]
-
Output
Function
When the input is ON, this instruction finds the 2’s complement value of double-word data
A+1
×
A
, and
stores it in
B+1
×
B
.
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution ON
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
ÖÖÖÖÖÖÖ Ö
B
Destination
ÖÖÖÖÖÖ
Example
When X007 is ON, the 2’s complement value (sign inverted data) of double-word register
RW41
×
RW40 is stored in double-word register D0151
×
D0150.
For example, if RW41
×
RW40 is -1234567890, the 2’s complement value 1234567890 is stored in
D0151
×
D0150.
Note
·
The data range of
A+1
×
A
is -2147483648 to 2147483647. If the data of
A+1
×
A
is -2147483648, the
same data -2147483648 is stored in
B+1
×
B
.
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