SUBtract Address

NAME
	SUBA -- Subtract address

SYNOPSIS
	SUBA	<ea>,An

	Size = (Word, Long)

FUNCTION
        Subtracts source operand to destination operand.
        Source operand with a Word size is extended to 32 bits before
        operation. Result is stored to destination's place.

FORMAT
	-----------------------------------------------------------------
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|-----------|-----------|-----------|-----------|
	| 1 | 0 | 0 | 1 |  REGISTER |  OP-MODE  |    MODE   |  REGISTER |
	----------------------------------------=========================
                                                          <ea>
OP-MODE
	Indicates operation lenght:
	011->one Word operation: source operand is extended to 32 bits
	111->one Long operation

REGISTER
	<ea> is source, allowed addressing modes 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|
	---------------------------------

RESULT
        None.

SEE ALSO
	ADDA SUBI
        SUBQ SUBX