DIVU - M68K instruction reference

divuUnsigned divide 
Divides (unsigned) the value of the second operand by the value of the first operand (op2 / op1).
Size .w
Used in Arithmetic, logic and bitsM68K assembly
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Arithmetic, logic and bitsAssembly basics
 
XNZVC –●●●0
● set from the result
0 always 0
– not changed
Forms  divu ,   
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 quotient is stored in the low 16 bits of the destination register and the remainder in its high 16 bits. The first operand is read as a word, the second as a long
 * --- Result: quotient in low word, remainder in high word ---
move.l #21, d0
divu #4, d0
move.w d0, d1 ; d1 = quotient (5)
swap d0
move.w d0, d2 ; d2 = remainder (1)

* --- Large unsigned value ---
move.l #$FFFE, d3
divu #$FFFF, d3
move.w d3, d4 ; d4 = quotient (0)
swap d3
move.w d3, d5 ; d5 = remainder ($FFFE)