PIC18FXX20
NEGF
Negate f
NOP
No Operation
Syntax:
Operands:
[label] NEGF f [,a]
0 ≤ f ≤ 255
a ∈ [0,1]
( f ) + 1 → f
N, OV, C, DC, Z
Syntax:
[ label ] NOP
None
No operation
None
Operands:
Operation:
Status Affected:
Encoding:
Operation:
Status Affected:
Encoding:
0000
1111
0000
xxxx
0000
xxxx
0000
xxxx
0110
110a
ffff
ffff
Description:
Words:
Cycles:
No operation.
1
1
Description:
Location ‘f’ is negated using two’s
complement. The result is placed in
the data memory location 'f'. If ‘a’ is
0, the Access Bank will be
Q Cycle Activity:
Q1
selected, overriding the BSR value.
If ‘a’ = 1, then the bank will be
selected as per the BSR value.
Q2
No
operation
Q3
No
Q4
Decode
No
operation
operation
Words:
Cycles:
1
1
Example:
None.
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
Process
Write
register 'f'
Data
register 'f'
NEGF
REG, 1
Example:
Before Instruction
REG
=
0011 1010 [0x3A]
1100 0110 [0xC6]
After Instruction
REG
=
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 287
MICROCHIP [ MICROCHIP ]
