diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib.rs | 55 |
1 files changed, 55 insertions, 0 deletions
@@ -2941,6 +2941,61 @@ fn decode_instruction< let llllll = (l_high << 3) | l_low; handler.on_source_decoded(Operand::imm_u8(llllll))?; } + 0b0010 => { + let opc_hi = (inst >> 22) & 0b11; + let opc_lo = (inst >> 5) & 0b111; + let opc = (opc_hi << 3) | opc_lo; + + let assign_mode_bits = opc >> 2; + let shift_op_bits = opc & 0b11; + + let assign_mode = match assign_mode_bits { + 0b000 => AssignMode::SubAssign, + 0b001 => AssignMode::AddAssign, + 0b010 => AssignMode::AndAssign, + 0b011 => AssignMode::OrAssign, + 0b100 => AssignMode::XorAssign, + _ => { + return Err(DecodeError::InvalidOpcode); + } + }; + let opc = match shift_op_bits { + 0b00 => Opcode::Asr, + 0b01 => Opcode::Lsr, + 0b10 => Opcode::Asl, + _ => Opcode::Rol, + }; + let sssss = reg_b16(inst); + let xxxxx = reg_b0(inst); + let u6 = ((inst >> 8) & 0b11_1111) as u8; + handler.assign_mode(assign_mode)?; + handler.on_opcode_decoded(opc)?; + handler.on_dest_decoded(Operand::gprpair(xxxxx)?)?; + handler.on_source_decoded(Operand::gprpair(sssss)?)?; + handler.on_source_decoded(Operand::imm_u8(u6))?; + } + 0b0011 => { + let xxxxx = reg_b0(inst); + let sssss = reg_b16(inst); + + let opc_lo = (inst >> 5) & 0b111; + let opc_hi = (inst >> 21) & 0b111; + let opc = (opc_hi << 3) | opc_lo; + + // TODO: it's not clear which immediate is the #u6 versus #U6 + // they may be backwards in the decoding.. + handler.on_dest_decoded(Operand::gprpair(xxxxx)?)?; + handler.on_source_decoded(Operand::gprpair(sssss)?)?; + handler.on_opcode_decoded(Opcode::Insert)?; + + let iiiiii = (inst >> 8) & 0b111111; + let l_lo = (inst >> 5) & 0b111; + let l_hi = (inst >> 21) & 0b111; + let llllll = l_lo | (l_hi << 3); + + handler.on_source_decoded(Operand::imm_u8(iiiiii as u8))?; + handler.on_source_decoded(Operand::imm_u8(llllll as u8))?; + } 0b1111 => { opcode_check!(inst & 0x00102000 == 0); handler.on_source_decoded(Operand::gpr(sssss))?; |