Motorola CPU32 Reference Manual page 77

ADDA Add Address
ADDA
Operation: Source
+
Destination
~
Destination
Assembler
Syntax:
Attributes:
ADDA <ea> An
Size
=
(Word. Long)
Description:
Adds the source operand to the destination address register and stores the result in
the address register. The entire destination address register is used regardless of the operation
8 7 6 5 4 3 2
o
OPMODE
EFFECTIVE
I
ADDRESS
MODE REGISTER
Instruction Fields:
Register field - Specifies any of the eight address registers. This is always the destination.
Opmode field - Specifies the size of the operation:
011 - Word operation. The source operand is sign-extended to a long operand and the
operation is performed on the address register using all 32 bits.
111 - Long operation.
Effective Address field - Specifies source operand. All addressing modes are allowed as shown:
Addressing Mode
MOTOROLA
4-24
On
An
(An)
(An) +
-(An)
(d16. An)
(d8. An, Xn)
(bd, An, Xn)
Mode
000
001
010
011
100
101
110
110
Register Addressing Mode Mode Register
Reg. number: On (xxx).w
111 000
Reg. number: An (xxx).L
111 001
Reg. number: An
#(data) 111 100
Reg. number: An
Reg. number: An
Reg. number: An
(d16. PC) 111 010
Reg. number: An
(d8. PC. Xn) 111 011
Reg. number: An (bd, PC. Xn)
111 011
INSTRUCTION SET CPU32 REFERENCE MANUAL