PIC18F2331/2431/4331/4431
NEGF
Negate f
NOP
No Operation
Syntax:
[ label ] NEGF f [,a]
Syntax:
[ label ] NOP
None
Operands:
0 f 255
a [0,1]
Operands:
Operation:
Status Affected:
Encoding:
No operation
None
Operation:
( f ) + 1 f
Status Affected:
Encoding:
N, OV, C, DC, Z
0000
1111
0000
xxxx
0000
xxxx
0000
xxxx
0110
110a
ffff
ffff
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 selected,
overriding the BSR value. If ‘a’ = 1, then
the bank will be selected as per the
BSR value.
Description:
Words:
No operation.
1
1
Cycles:
Q Cycle Activity:
Q1
Q2
Q3
No
operation
Q4
Decode
No
No
operation
Words:
Cycles:
1
1
operation
Example:
None.
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register ‘f’
Process
Data
Write
register ‘f’
Example:
NEGF
REG, 1
Before Instruction
REG
After Instruction
REG
=
0011 1010 [0x3A]
1100 0110 [0xC6]
=
2010 Microchip Technology Inc.
DS39616D-page 311
MICROCHIP [ MICROCHIP ]
