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UDIV (quotient)

Unsigned divide

This instruction divides the first unsigned source register value by the second unsigned source register value, and writes the result to the destination register. Dividing by zero writes the value zero to the destination register. The condition flags are not affected.

313029282726252423222120191817161514131211109876543210
sf0011010110Rm000010RnRd
So1

32-bit encoding

(sf == 0)

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

64-bit encoding

(sf == 1)

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

Decode (all encodings)

let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let m : integer{} = UInt(Rm); let datasize : integer{} = 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

let operand1 : bits(datasize) = X{}(n); let operand2 : bits(datasize) = X{}(m); let dividend : integer = UInt(operand1); let divisor : integer = UInt(operand2); var result : integer; if divisor == 0 then result = 0; else result = dividend DIVRM divisor; end; X{datasize}(d) = result[datasize-1:0];

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