SWAP register upper and lower words

NAME
	SWAP -- Swap register upper and lower words

SYNOPSIS
        SWAP	Dn

        Size = (Word)

FUNCTION
        Swaps between 16 low bits and 16 high bits of register.

FORMAT
	-----------------------------------------------------------------
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|---|---|---|---|---|---|---|---|---|-----------|
	| 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | REGISTER  |
	-----------------------------------------------------------------

	"REGISTER" indicates the number of register on which swap is made.

RESULT
	X - Not affected
	N - Set if the most-significant bit of the result was set. Cleared
	    otherwise.
	Z - Set if the 32 bits result was zero. Cleared otherwise.
	V - Always cleared.
	C - Always cleared.

SEE ALSO
	EXG