Motorola CPU32 Reference Manual page 170

MULU Unsigned Multiply
MULU
Instruction Format (long form):
15 14 13 12 11 10 9 8 7 6
5
4 3 2
o
EFFECTIVE ADDRESS
0 1
0 0
1
1
0
0 0 0
MODE
REGISTER
0 REGISTER 01 0
SIZE
0 0 0 0 0
J
o
I
0
REGISTER Dh
Instruction Fields:
Effective Address field - Specifies the source operand. Only data addressing modes are
allowed as shown:
Addressing Mode Mode Register Addressing Mode Mode Register
On 000 Reg. number: On (xxx).W 111 000
An
-
-
(xxx).L 111 001
(An) 010 Reg. number: An
#(data)
111 100
(An) +
011
Reg. number: An
-(An) 100 Reg. number: An
(d16,An)
101
Reg. number: An
(d16, PC)
111 010
(dS, An, Xn)
110 Reg. number: An
(ds, PC, Xn)
111 011
(bd, An, Xn)
110 Reg. number: An (bd, PC, Xn) 111 011
Register 01 field - Specifies a data register for the destination operand. The 32-bit multiplicand
comes from this register, and the low-order 32 bits of the product are loaded into this register.
Size field - Selects a 32- or 64-bit product.
0- 32-bit product to be returned to Register 01.
1 -
64-bit product to be returned to Oh:OI.
Register Oh field - If Size is 1, specifies the data register into which the high-order 32 bits of the
product are loaded. If Oh
=
01 and Size is 1, the results of the operation are undefined.
CPU32 REFERENCE MANUAL INSTRUCTION SET MOTOROLA
4-117
III