UDIV

Unsigned divide

This instruction divides an unsigned integer register value by another unsigned integer register value, and writes the result to the destination register. The condition flags are not affected.

313029282726252423222120191817161514131211109876543210
sf0011010110Rm000010RnRd
So1

32-bit (sf == 0)

UDIV <Wd>, <Wn>, <Wm>

64-bit (sf == 1)

UDIV <Xd>, <Xn>, <Xm>

constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer m = UInt(Rm); constant integer datasize = 32 << UInt(sf);

Assembler Symbols

<Wd>

Is the 32-bit name of the general-purpose destination register, encoded in the "Rd" field.

<Wn>

Is the 32-bit name of the first general-purpose source register, encoded in the "Rn" field.

<Wm>

Is the 32-bit name of the second general-purpose source register, encoded in the "Rm" field.

<Xd>

Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field.

<Xn>

Is the 64-bit name of the first general-purpose source register, encoded in the "Rn" field.

<Xm>

Is the 64-bit name of the second general-purpose source register, encoded in the "Rm" field.

Operation

constant bits(datasize) operand1 = X[n, datasize]; constant bits(datasize) operand2 = X[m, datasize]; integer result; if IsZero(operand2) then result = 0; else result = RoundTowardsZero(Real(UInt(operand1)) / Real(UInt(operand2))); X[d, datasize] = result<datasize-1:0>;