Motorola CPU32 Reference Manual page 155

II
MOVE
USP
Operation:
Assembler
Syntax:
Attributes:
If supervisor state
Move User Stack Pointer
(Privileged Instruction)
then USP ~ An or An ~ USP
else TRAP
MOVE USP, An
MOVE An, USP
Size
=
(Long)
MOVE
USP
Description: Moves the contents of the user stack pointer to or from the specified address register.
Condition Codes:
Not affected.
Instruction Format:
15 14 13 12 11 10 9 8
0
I
1
I
0
I
0
I
1
I
1 1
I
0
I
Instruction Fields:
dr field - Specifies the direction of transfer:
o -
Transfer the address register to the USP.
1 - Transfer the USP to the address register.
7 6 5 4 3
2 0
0
I
1
1
I
0
I
dr
REGISTER
Register field - Specifies the address register for the operation.
MOTOROLA
4-102
INSTRUCTION SET
CPU32 REFERENCE MANUAL