MULU - M68K instruction reference

muluUnsigned multiply 
Multiplies (unsigned) the value of the first operand by the second operand.
Size .w
Used in Arithmetic, logic and bitsM68K assembly
bsr, rts, link and unlkM68K assembly
trap #15 and its tasksM68K assembly
Multiply and divide, with the remainderM68K assembly
Stack arguments and a stack frameM68K assembly
Recursion: factorial and FibonacciM68K assembly
A jump tableM68K assembly
A 2D arrayM68K assembly
The snake gameM68K assembly
Flappy birdM68K assembly
 
XNZVC –●●00
● set from the result
0 always 0
– not changed
Forms  mulu ,   
Operands <ea> An operand using one of the instruction’s supported addressing modes, such as d0, (a0)+ or 4(a1). It may name a register, memory or an immediate value. More
Dn A data register, d0 to d7. More
#imm An immediate value written after #: a number, character or label, such as #10, #$FF or #'a'. It must fit the operation’s size: byte -128 to 255, word -32768 to 65535, or long -2147483648 to 4294967295; signed and unsigned spellings are accepted. More
The result is stored in the second operand. The first operand is read as a word, the second as a long
 move.l #2, d0
mulu #4, d0 ; d0 = 8

* --- Word operands, long result ---
move.l #$FFFF, d1
mulu #$FFFF, d1 ; d1 = $FFFE0001