ori

Or immediate

This instruction is defined by:

Encoding

Synopsis

Or an immediate to the value in rs1, and store the result in rd

Access

Always

Decode Variables

Bits<12> imm = $encoding[31:20];
Bits<5> rs1 = $encoding[19:15];
Bits<5> rd = $encoding[11:7];

Execution

Pruned, XLEN == 64
Original

X[rd] = X[rs1] | imm;

if (implemented?(ExtensionName::Zicbop)) {
  if (rd == 0) {
    if (imm[4:0] == 0) {
      Bits<12> offset = {imm[11:5], rd};
      prefetch_instruction(offset);
    } else if (imm[4:0] == 1) {
      Bits<12> offset = {imm[11:5], rd};
      prefetch_read(offset);
    } else if (imm[4:0] == 3) {
      Bits<12> offset = {imm[11:5], rd};
      prefetch_write(offset);
    }
  }
}
X[rd] = X[rs1] | imm;