NEGate with eXtend

NAME
	NEGX -- Negate with extend

SYNOPSIS
	NEGX	<ea>

	Size = (Byte, Word, Long)

FUNCTION
	Perform an operation similar to a NEG, with the
	exception that the operand and the extend bit are both
	subtracted from zero. The result then is being placed in
	the given <ea>.

	As with ADDX, SUBX, ABCD,
	SBCD, and NBCD, it can be useful to set
	the zero flag before performing this operation so that
	multi precision operations can be tested for zero.

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

SIZE
	00->Byte.
	01->Word.
	10->Long.

REGISTER
	<ea> specifies destination operand, addressing modes allowed are:
	--------------------------------- -------------------------------
	|Addressing Mode|Mode| Register | |Addressing Mode|Mode|Register|
	|-------------------------------| |-----------------------------|
	|      Dn       |000 |N reg. Dn| |    Abs.W      |111 |  000   |
	|-------------------------------| |-----------------------------|
	|      An       | -  |    -     | |    Abs.L      |111 |  001   |
	|-------------------------------| |-----------------------------|
	|     (An)      |010 |N reg. An| |   (d16,PC)    | -  |   -    |
	|-------------------------------| |-----------------------------|
	|     (An)+     |011 |N reg. An| |   (d8,PC,Xi)  | -  |   -    |
	|-------------------------------| |-----------------------------|
	|    -(An)      |100 |N reg. An| |   (bd,PC,Xi)  | -  |   -    |
	|-------------------------------| |-----------------------------|
	|    (d16,An)   |101 |N reg. An| |([bd,PC,Xi],od)| -  |   -    |
	|-------------------------------| |-----------------------------|
	|   (d8,An,Xi)  |110 |N reg. An| |([bd,PC],Xi,od)| -  |   -    |
	|-------------------------------| |-----------------------------|
	|   (bd,An,Xi)  |110 |N reg. An| |    #data      | -  |   -    |
	|-------------------------------| -------------------------------
	|([bd,An,Xi]od) |110 |N reg. An|
	|-------------------------------|
	|([bd,An],Xi,od)|110 |N reg. An|
	---------------------------------

RESULT
	X - Set the same as the carry bit.
	N - Set if the result is negative, otherwise cleared.
	Z - Cleared if the result is non-zero, otherwise unchanged.
	V - Set if an overflow is generated, cleared otherwise.
	C - Set if a borrow is generated, otherwise cleared.

SEE ALSO
	NEG NBCD ADDX SUBX

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