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SUBI
Subtract Immediate
Instruction Fields:
Size field -
Specifies the size of the operation.
00 -
Byte operation
01 - Word operation
10 -
Long operation
SUBI
Effective Address field -
Specifies the destination operand. Only data alterable addressing
modes are allowed as shown:
Addressing Mode
Mode
Reg ister
Addressing Mode
Dn
000
Reg. number: Dn
(xxx).W
An
-
-
(xxx).L
(An)
010
Reg. number: An
#(data)
(An) +
011
Reg. number: An
-(An)
100
Reg. number: An
(d16, An)
101
Reg. number: An
(d16, PC)
(de, An, Xn)
110
Reg. number: An
(de, PC, Xn)
(bd, An, Xn)
110
Reg. number: An
(bd, PC, Xn)
Immediate field -
(Data immediately following the instruction)
If size
=
00, the data is the low-order byte of the immediate word.
If size
=
01, the data is the entire immediate word.
If size
=
10, the data is the next two immediate words.
CPU32 REFERENCE MANUAL
INSTRUCTION SET
Mode
111
111
-
-
-
-
Register
000
001
-
-
-
-
MOTOROLA
4-153
III
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