divu


Divides unsigned word.

[Syntax]

-

divu reg1, reg2, reg3

-

divu imm, reg2, reg3

 

The following can be specified for imm:

-

Absolute expression having a value of up to 32 bits

-

Relative expression

[Function]

-

Syntax "divu reg1, reg2, reg3"

Divides the register value specified by the second operand by the register value specified by the first operand as an unsigned value and stores the quotient in the register specified by the second operand, and the remainder in the register specified by the third operand. If the same register is specified by the second and third operands, the remainder is stored in that register.

-

Syntax "divu imm, reg2, reg3"

Divides the register value specified by the second operand by the value of the absolute or relative expression specified by the first operand as an unsigned value and stores the quotient in the register specified by the second operand, and the remainder in the register specified by the third operand. If the same register is specified by the second and third operands, the remainder is stored in that register.

[Description]

-

If the instruction is executed in syntax "divu reg1, reg2, reg3", the assembler generates one divu machine instruction.

-

If the instruction is executed in syntax "divu imm, reg2, reg3", and the following expression is specified for imm, the assembler executes instruction expansion to generate one or more machine instructionsNote.

(a)

0

divu    0, reg2, reg3
divu    r0, reg2, reg3

(b)

Absolute expression having a value of other than 0 whithin the range of -16 to +15

divu    imm5, reg2, reg3
mov     imm5, r1
divu    r1, reg2, reg3

(c)

Absolute expression exceeding the range of -16 to +15, but within the range of -32,768 to +32,767

divu    imm16, reg2, reg3
movea   imm16, r0, r1
divu    r1, reg2, reg3

(d)

Absolute expression having a value exceeding the range of -32,768 to +32,767

If all the lower 16 bits of the value of imm are 0

divu imm, reg2, reg3
movhi   HIGHW(imm), r0, r1
divu    r1, reg2, reg3

Else

divu    imm, reg2, reg3
mov     imm, r1
divu    r1, reg2, reg3

(e)

Relative expression having !label or %label, or that having $label for a label having a definition in the sdata/sbss-attribute section

divu    !label, reg2, reg3
movea   !label, r0, r1
divu    r1, reg2, reg3
divu    %label, reg2, reg3
movea   %label, r0, r1
divu    r1, reg2, reg3
divu    $label, reg2, reg3
movea   $label, r0, r1
divu    r1, reg2, reg3

(f)

Relative expression having #label or label, or that having $label for a label having no definition in the sdata/sbss-attribute section

divu    #label, reg2, reg3
mov     #label, r1
divu    r1, reg2, reg3
divu    label, reg2, reg3
mov     label, r1
divu    r1, reg2, reg3
divu    $label, reg2, reg3
mov     $label, r1
divu    r1, reg2, reg3

Note

The divu machine instruction does not take an immediate value as an operand.

[Flag]

CY

---

OV

1 if Integer-Overflow occurs, 0 if not

S

1 if the word data MSB of the result is 1, 0 if not

Z

1 if the result is 0, 0 if not

SAT

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