68000 データシートの表示（PDF） - Freescale Semiconductor

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68000

8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor 

Freescale Semiconductor, Inc.

Table 2-2. Instruction Set Summary (Sheet 4 of 4)

Opcode

RTE

RTR

RTS

SBCD

Operation

If supervisor state

then (SP) → SR; SP + 2 → SP; (SP) → PC;

SP + 4 → SP;

restore state and deallocate stack according to (SP)

else TRAP

(SP) → CCR; SP + 2 → SP;

(SP) → PC; SP + 4 → SP

(SP) → PC; SP + 4 → SP

Destination10 – Source10 – X → Destination

Scc

STOP

SUB

If condition true

then 1s → Destination

else 0s → Destination

If supervisor state

then Immediate Data → SR; STOP

else TRAP

Destination – Source → Destination

SUBA

SUBI

SUBQ

SUBX

Destination – Source → Destination

Destination – Immediate Data → Destination

Destination – Immediate Data → Destination

Destination – Source – X → Destination

SWAP Register [31:16] ↔ Register [15:0]

TAS

Destination Tested → Condition Codes; 1 → bit 7 of

Destination

TRAP

SSP – 2 → SSP; Format/Offset → (SSP);

SSP – 4 → SSP; PC → (SSP); SSP–2 → SSP;

SR → (SSP); Vector Address → PC

TRAPV If V then TRAP

TST

Destination Tested → Condition Codes

UNLK An → SP; (SP) → An; SP + 4 → SP

NOTE: d is direction, L or R.

Syntax

RTE

RTR

RTS

SBCD Dx,Dy

SBCD –(Ax),–(Ay)

Scc <ea>

STOP # <data>

SUB <ea>,Dn

SUB Dn,<ea>

SUBA <ea>,An

SUBI # <data>,<ea>

SUBQ # <data>,<ea>

SUBX Dx,Dy

SUBX –(Ax),–(Ay)

SWAP Dn

TAS <ea>

TRAP # <vector>

TRAPV

TST <ea>

UNLK An

2-14

M68000 8-/16-/32-BIT MICROPROCESSOR USER’S MANUAL

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