divu

Unsigned division

This instruction is defined by:

Encoding

Synopsis

Divide unsigned values in rs1 by rs2, and store the result in rd.

The remainder is discarded.

If the value in rs2 is zero, rd gets the largest unsigned value.

Access

Always

Decode Variables

Bits<5> rs2 = $encoding[24:20];
Bits<5> rs1 = $encoding[19:15];
Bits<5> rd = $encoding[11:7];

Execution

Pruned, XLEN == 64
Original

XReg src1 = X[rs1];
XReg src2 = X[rs2];
if (src2 == 0) {
  X[rd] = {XLEN{1'b1}};
} else {
  X[rd] = src1 / src2;
}

if (implemented?(ExtensionName::M) && (CSR[misa].M == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
XReg src1 = X[rs1];
XReg src2 = X[rs2];
if (src2 == 0) {
  X[rd] = {XLEN{1'b1}};
} else {
  X[rd] = src1 / src2;
}