Move to/from USP (privileged)

NAME
	MOVE USP -- Move to/from user stack pointer (privileged)

SYNOPSIS
	MOVE	USP,An
	MOVE	An,USP

	Size = (Long)

FUNCTION
	The contents of the user stack pointer are transfered either to
	or from the specified address register.

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

	"REGISTER" indicates the number of address register.

	dr specifies move direction:
	0->An to USP
	1->USP to An

RESULT
	None.

SEE ALSO
	MOVE from CCR	MOVE to CCR
	MOVE from SR	MOVE to SR