m68k

鎖定

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Motorola 68000 Instruction Set.
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Condition Codes
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Assembler Data
Instruction Description Syntax Size X N Z V C
----------------------- --------- ---- ---------
ABCD Add BCD with extend Dx,Dy B-- * U * U *
-(Ax),-(Ay)
ADD ADD binary Dn,<ea> BWL * * * * *
<ea>,Dn
ADDA ADD binary to An <ea>,An -WL - - - - -
ADDI ADD Immediate #x,<ea> BWL * * * * *
ADDQ ADD 3-bit immediate #<1-8>,<ea> BWL * * * * *
ADDX ADD eXtended Dy,Dx BWL * * * * *-(Ay),-(Ax)
AND Bit-wise AND <ea>,Dn BWL - * * 0 0
Dn,<ea>
ANDI Bit-wise AND with Immediate #<data>,<ea> BWL - * * 0 0
ASL Arithmetic Shift Left #<1-8>,Dy BWL * * * * *
Dx,Dy
<ea>
ASR Arithmetic Shift Right ... BWL * * * * *
Bcc Conditional Branch Bcc.S <label> BW- - - - - -
Bcc.W <label>
BCHG Test a Bit and CHanGe Dn,<ea> B-L - - * - -
#<data>,<ea>
BCLR Test a Bit and CLeaR ... B-L - - * - -
BSET Test a Bit and SET ... B-L - - * - -
BSR Branch to SubRoutine BSR.S <label> BW- - - - - -
BSR.W <label>
BTST Bit TeST Dn,<ea> B-L - - * - -
#<data>,<ea>
CHK CHecK Dn Against Bounds <ea>,Dn -W- - * U U U
CLR CLeaR <ea> BWL - 0 1 0 0
CMP CoMPare <ea>,Dn BWL - * * * *
CMPA CoMPare Address <ea>,An -WL - * * * *
CMPI CoMPare Immediate #<data>,<ea> BWL - * * * *
CMPM CoMPare Memory (Ay)+,(Ax)+ BWL - * * * *
DBcc Looping Instruction DBcc Dn,<label> -W- - - - - -
DIVS DIVide Signed <ea>,Dn -W- - * * * 0
DIVU DIVide Unsigned <ea>,Dn -W- - * * * 0
EOR Exclusive OR Dn,<ea> BWL - * * 0 0
EORI Exclusive OR Immediate #<data>,<ea> BWL - * * 0 0
EXG Exchange any two registers Rx,Ry --L - - - - -
EXT Sign EXTend Dn -WL - * * 0 0
ILLEGAL ILLEGAL-Instruction Exception ILLEGAL - - - - -
JMP JuMP to Affective Address <ea> - - - - -
JSR Jump to SubRoutine <ea> - - - - -
LEA Load Effective Address <ea>,An --L - - - - -
LINK Allocate Stack Frame An,#<displacement> - - - - -
LSL Logical Shift Left Dx,Dy BWL * * * 0 *
#<1-8>,Dy
<ea>
LSR Logical Shift Right ... BWL * * * 0 *
MOVE Between Effective Addresses <ea>,<ea> BWL - * * 0 0
MOVE To CCR <ea>,CCR -W- I I I I I
MOVE To SR <ea>,SR -W- I I I I I
MOVE From SR SR,<ea> -W- - - - - -
MOVE USP to/from Address Register USP,An --L - - - - -
An,USP
MOVEA MOVE Address <ea>,An -WL - - - - -
MOVEM MOVE Multiple <register list>,<ea> -WL - - - - -
<ea>,<register list>
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MOVEP MOVE Peripheral Dn,x(An) -WL - - - - -
x(An),Dn
MOVEQ MOVE 8-bit immediate #<-128.+127>,Dn --L - * * 0 0
MULS MULtiply Signed <ea>,Dn -W- - * * 0 0
MULU MULtiply Unsigned <ea>,Dn -W- - * * 0 0
NBCD Negate BCD <ea> B-- * U * U *
NEG NEGate <ea> BWL * * * * *
NEGX NEGate with eXtend <ea> BWL * * * * *
NOP No OPeration NOP - - - - -
NOT Form one's complement <ea> BWL - * * 0 0
OR Bit-wise OR <ea>,Dn BWL - * * 0 0
Dn,<ea>
ORI Bit-wise OR with Immediate #<data>,<ea> BWL - * * 0 0
PEA Push Effective Address <ea> --L - - - - -
RESET RESET all external devices RESET - - - - -
ROL ROtate Left #<1-8>,Dy BWL - * * 0 *
Dx,Dy
<ea>
ROR ROtate Right ... BWL - * * 0 *
ROXL ROtate Left with eXtend ... BWL * * * 0 *
ROXR ROtate Right with eXtend ... BWL * * * 0 *
RTE ReTurn from Exception RTE I I I I I
RTR ReTurn and Restore RTR I I I I I
RTS ReTurn from Subroutine RTS - - - - -
SBCD Subtract BCD with eXtend Dx,Dy B-- * U * U *
-(Ax),-(Ay)
Scc Set to -1 if True, 0 if False <ea> B-- - - - - -
STOP Enable & wait for interrupts #<data> I I I I I
SUB SUBtract binary Dn,<ea> BWL * * * * *
<ea>,Dn
SUBA SUBtract binary from An <ea>,An -WL - - - - -
SUBI SUBtract Immediate #x,<ea> BWL * * * * *
SUBQ SUBtract 3-bit immediate #<data>,<ea> BWL * * * * *
SUBX SUBtract eXtended Dy,Dx BWL * * * * *
-(Ay),-(Ax)
SWAP SWAP words of Dn Dn -W- - * * 0 0
TAS Test & Set MSB & Set N/Z-bits <ea> B-- - * * 0 0
TRAP Execute TRAP Exception #<vector> - - - - -
TRAPV TRAPV Exception if V-bit Set TRAPV - - - - -
TST TeST for negative or zero <ea> BWL - * * 0 0
UNLK Deallocate Stack Frame An - - - - -
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Symbol   Meaning
------   -------
*        Set according to result of operation
-        Not affected
0        Cleared
1        Set
U        Outcome (state after operation) undefined
I        Set by immediate data
<ea>     Effective Address Operand
<data>   Immediate data
<label>  Assembler label
<vector> TRAP instruction Exception vector (0-15)
<rg.lst> MOVEM instruction register specification list
<displ.> LINK instruction negative displacement
... Same as previous instruction
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Addressing Modes Syntax
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Data Register Direct Dn
Address Register Direct An
Address Register Indirect (An)
Address Register Indirect with Post-Increment (An)+
Address Register Indirect with Pre-Decrement -(An)
Address Register Indirect with Displacement w(An)
Address Register Indirect with Index b(An,Rx)
Absolute Short w
Absolute Long l
Program Counter with Displacement w(PC)
Program Counter with Index b(PC,Rx)
Immediate #x
Status Register SR
Condition Code Register CCR
Legend
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Dn Data Register (n is 0-7)
An Address Register (n is 0-7)
b 08-bit constant
w 16-bit constant
l 32-bit constant
x 8-, 16-, 32-bit constant
Rx Index Register Specification, one of:
Dn.W Low 16 bits of Data Register
Dn.L All 32 bits of Data Register
An.W Low 16 bits of Address Register
An.L All 32 bits of Address Register
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Condition Codes for Bcc, DBcc and Scc Instructions.
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Condition Codes set after CMP D0,D1 Instruction.
Relationship Unsigned Signed
------------ -------- ------
D1 < D0 CS - Carry Bit Set LT - Less Than
D1 <= D0 LS - Lower or Same LE - Less than or Equal
D1 = D0 EQ - Equal (Z-bit Set) EQ - Equal (Z-bit Set)
D1 != D0 NE - Not Equal (Z-bit Clear) NE - Not Equal (Z-bit Clear)
D1 > D0 HI - HIgher than GT - Greater Than
D1 >= D0 CC - Carry Bit Clear GE - Greater than or Equal
PL - PLus (N-bit Clear) MI - Minus (N-bit Set)
VC - V-bit Clear (No Overflow) VS - V-bit Set (Overflow)
RA - BRanch Always
DBcc Only - F - Never Terminate (DBRA is an alternate to DBF)
T - Always Terminate
Scc Only - SF - Never Set
ST - Always Set
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Parts from "Programming the 68000" by Steve Williams. (c) 1985 Sybex Inc.
Parts from BYTE Magazine article.
Compiled by Diego Barros.
Revision 2.1 22 May, 1994
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