Typewriter User Manual

MOTOROLA MC68340 USER’S MANUAL 5- 21
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
16, 32 ⇒ 32
Listed registers ⇒ Destination
Source ⇒ Listed registers
MOVEP Dn, (d
16
, 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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