Table of Contents
Advertisement
ROL, ROR
Rotate (Without Extend)
ROL, ROR
Instruction Format (Memory Rotate):
15
14
13
12
11
10
9
8
1
1
1
0
0
1
1
dr
Instruction Fields (Memory Rotate):
dr field - Specifies the direction of the rotate:
o -
Rotate right
1 -
Rotate left
7
6
5
4
3
2
o
EFFECTIVE ADDRESS
1
1
MODE
I
REGISTER
Effective Address field -
Specifies the operand to be rotated. Only memory alterable addressing
modes are allowed as shown:
Addressing Mode
Mode
On
-
An
-
(An)
010
(An)
+
011
-(An)
100
(d16, An)
101
(de, An, Xn)
110
(bd, An, Xn)
110
CPU32 REFERENCE MANUAL
Register
Addressing Mode
-
(xxx).w
-
(xxx).L
Reg. number: An
#(data)
Reg. number: An
Reg. number: An
Reg. number: An
(d16, PC)
Reg. number: An
(de, PC, Xn)
Reg. number: An
(bd, PC, Xn)
INSTRUCTION SET
Mode
111
111
-
-
-
-
Register
000
001
-
-
-
-
MOTOROLA
4-137
Advertisement
Table of Contents
