c.j

Jump

This instruction is defined by:

Encoding

svg

Synopsis

C.J performs an unconditional control transfer. The offset is sign-extended and added to the pc to form the jump target address. C.J can therefore target a ±2 KiB range. It expands to jal x0, offset.

Access

M

HS

U

VS

VU

Always

Always

Always

Always

Always

Decode Variables

signed Bits<12> imm = sext({$encoding[12], $encoding[8], $encoding[10:9], $encoding[6], $encoding[7], $encoding[2], $encoding[11], $encoding[5:3], 1'd0});

Execution

  • Pruned, XLEN == 64

  • Original

jump($pc + imm);
if (implemented?(ExtensionName::C) && (CSR[misa].C == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
jump($pc + imm);

Exceptions

This instruction may result in the following synchronous exceptions:

  • InstructionAddressMisaligned