CoMPare

NAME
	CMP -- Compare

SYNOPSIS
	CMP	<ea>,Dn

	Size = (Byte, Word, Long)

FUNCTION
	Subtracts the source operand from the destination data register and
	sets the condition codes according to the result. The data register
	is NOT changed.

FORMAT
	-----------------------------------------------------------------
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|-----------|-----------|-----------|-----------|
	| 1 | 0 | 1 | 1 |  REGISTER |  OP-MODE  |    MODE   | REGISTER  |
	----------------------------------------=========================
	                                                  <ea>

OP-MODE
	000	8 bits operation.
	001	16 bits operation.
	010	32 bits operation.

REGISTER
	The data register specifies destination Dn.
	<ea> specifies source operand, addressing modes allowed are:
	--------------------------------- -------------------------------
	|Addressing Mode|Mode| Register | |Addressing Mode|Mode|Register|
	|-------------------------------| |-----------------------------|
	|      Dn       |000 |N° reg. Dn| |    Abs.W      |111 |  000   |
	|-------------------------------| |-----------------------------|
	|      An *     |001 |N° reg. An| |    Abs.L      |111 |  001   |
	|-------------------------------| |-----------------------------|
	|     (An)      |010 |N° reg. An| |   (d16,PC)    |111 |  010   |
	|-------------------------------| |-----------------------------|
	|     (An)+     |011 |N° reg. An| |   (d8,PC,Xi)  |111 |  011   |
	|-------------------------------| |-----------------------------|
	|    -(An)      |100 |N° reg. An| |   (bd,PC,Xi)  |111 |  011   |
	|-------------------------------| |-----------------------------|
	|   (d16,An)    |101 |N° reg. An| |([bd,PC,Xi],od)|111 |  011   |
	|-------------------------------| |-----------------------------|
	|   (d8,An,Xi)  |110 |N° reg. An| |([bd,PC],Xi,od)|111 |  011   |
	|-------------------------------| |-----------------------------|
	|   (bd,An,Xi)  |110 |N° reg. An| |    #data      |111 |  100   |
	|-------------------------------| -------------------------------
	|([bd,An,Xi]od) |110 |N° reg. An|
	|-------------------------------|
	|([bd,An],Xi,od)|110 |N° reg. An|
	---------------------------------
	 * Word or Long only
	
RESULT
	X - Not affected
	N - Set if the result is negative. Cleared otherwise.
	Z - Set if the result is zero. Cleared otherwise.
	V - Set if an overflow is generated. Cleared otherwise.
	C - Set if a carry is generated. Cleared otherwise.

SEE ALSO
	CMPI CMPA CMP2
	CMPM CHK  CHK2
	TST