6F3B0253
Basic Hardware and Function 233
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 Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
A Source
√√√√√√√ √
B Destination
√√√√√√
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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