
1997 Microchip Technology Inc.
DS30272A-page 81
PIC16C71X
RLF
Rotate Left f through Carry
Syntax:
[
label ]
RLF
f,d
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
See description below
Status Affected:
C
Encoding:
00
1101
dfff
ffff
Description:
The contents of register 'f' are rotated
one bit to the left through the Carry
Flag. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
stored back in register 'f'.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
Example
RLF
REG1,0
Before Instruction
REG1
=
1110 0110
C
=
0
After Instruction
REG1
=
1110 0110
W
=
1100 1100
C
=
1
Register f
C
RRF
Rotate Right f through Carry
Syntax:
[
label ]
RRF f,d
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
See description below
Status Affected:
C
Encoding:
00
1100
dfff
ffff
Description:
The contents of register 'f' are rotated
one bit to the right through the Carry
Flag. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
placed back in register 'f'.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
Example
RRF
REG1,0
Before Instruction
REG1
=
1110 0110
C
=
0
After Instruction
REG1
=
1110 0110
W
=
0111 0011
C
=
0
Register f
C