Motorola CPU32 Reference Manual page 83

II
ADDX
Add Extended
Instruction Fields:
Register Rx field - Specifies the destination register:
If RIM
=
0, specifies a data register.
If RIM
=
1, specifies an address register for predecrement addressing mode.
Size field - Specifies the size of the operation:
00 - Byte operation
01 - Word operation
10 - Long operation
RIM field - Specifies the operand address mode:
o -
The operation is data register to data register.
1 - The operation is memory to memory.
Register Ry field - Specifies the source register:
If RIM
=
0, specifies a data register.
If RIM
=
1, specifies an address register for predecrement addressing mode.
ADDX
MOTOROLA
4-30
INSTRUCTION SET
CPU32 REFERENCE MANUAL