MOTOROLA
MC68341 USER’S MANUAL
5- 19
Table 5-3. Condition Code Computations (Continued)
Operations
X
N
Z
V
C
Special Definition
ROR
—
0
?
C = Dr – 1
ROR (r = 0)
—
00
NOTE : The following notations apply to this table only.
—
=
Not affected
Sm
=
Source operand MSB
U
=
Undefined
Dm
=
Destination operand MSB
?
=
See special definition
Rm
=
Result operand MSB
=
General case
R
=
Register tested
X
=
C
n
=
Bit Number
N
=
Rm
r
=
Shift count
Z=
Rm
Λ ... Λ R0
LB
=
Lower bound
Λ=
Boolean AND
UB
=
Upper bound
V
=
Boolean OR
Rm
=
NOT Rm
5.3.3.2 DATA MOVEMENT INSTRUCTIONS. The MOVE instruction is the basic means of
transferring and storing address and data. MOVE instructions transfer byte, word, and
long-word operands from memory to memory, memory to register, register to memory,
and register to register. Address movement instructions (MOVE or MOVEA) transfer word
and long-word operands and ensure that only valid address manipulations are executed.
In addition to the general MOVE instructions, there are several special data movement
instructions—move multiple registers (MOVEM), move peripheral data (MOVEP), move
quick (MOVEQ), exchange registers (EXG), load effective address (LEA), push effective
address (PEA), link stack (LINK), and unlink stack (UNLK). Table 5-4 is a summary of the
data movement operations.
Table 5-4. Data Movement Operations
Instruction
Operand
Syntax
Operand Size
Operation
EXG
Rn, Rn
32
Rn
Rn
LEA
ea, An
32
ea An
LINK
An, #
d
16, 32
SP – 4
SP, An (SP); SP An, SP + d SP
MOVE
ea, ea
8, 16, 32
Source
Destination
MOVEA
ea, An
16, 32
32
Source
Destination
MOVEM
list,
ea
ea, list
16, 32
32
Listed registers
Destination
Source
Listed registers
MOVEP
Dn, (d16, An)
(d 16, An), Dn
16, 32
Dn [31:24]
(An + d); Dn [23:16] (An + d + 2);
Dn [15:8]
(An + d + 4); Dn [7:0] (An + d + 6)
(An + d)
Dn [31:24]; (An + d + 2) Dn [23:16];
(An + d + 4)
Dn [15:8]; (An + d + 6) Dn [7:0]
MOVEQ
#
data, Dn
8
32
Immediate Data
Destination
PEA
ea
32
SP – 4
SP; ea SP
UNLK
An
32
An
SP; (SP) An, SP + 4 SP
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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