mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 271

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

ROL
Operation
n = RS or IMM4
Rotates the bits in register RD n positions to the left. The lower n bits of the register RD are filled with the
upper n bits. Two source forms are available. In the first form, the parameter n is contained in the
instruction code as an immediate operand. In the second form, the parameter is contained in the lower bits
of the source register RS[3:0]. All other bits in RS are ignored. If n is zero, no shift will take place and the
register RD will be unaffected; however, the condition code flags will be updated.
CCR Effects
Code and CPU Cycles
Freescale Semiconductor
N:
Z:
V:
C:
ROL RD, #IMM4
ROL RD, RS
N
Set if bit 15 of the result is set; cleared otherwise.
Set if the result is $0000; cleared otherwise.
0; cleared.
Not affected.
Z
V
0
Source Form
—
C
Address
MC9S12XDP512 Data Sheet, Rev. 2.17
Mode
IMM4
DYA
Rotate Left
0
0
0
0
n bits
RD
0
0
0
0
1
1
Machine Code
RD
RD
RS
IMM4
Chapter 6 XGATE (S12XGATEV2)
1
1
0
1
1
ROL
1
1
0
0
Cycles
P
P
271