Archipelago » qemu

/*

 * C3.4.5 Move wide (immediate)

 *

 *  31 30 29 28         23 22 21 20             5 4    0

 * +--+-----+-------------+-----+----------------+------+

 * |sf| opc | 1 0 0 1 0 1 |  hw |  imm16         |  Rd  |

 * +--+-----+-------------+-----+----------------+------+

 *

 * sf: 0 -> 32 bit, 1 -> 64 bit

 * opc: 00 -> N, 10 -> Z, 11 -> K

 * hw: shift/16 (0,16, and sf only 32, 48)

 */

    int rd = extract32(insn, 0, 5);

    uint64_t imm = extract32(insn, 5, 16);

    int sf = extract32(insn, 31, 1);

    int opc = extract32(insn, 29, 2);

    int pos = extract32(insn, 21, 2) << 4;

    TCGv_i64 tcg_rd = cpu_reg(s, rd);

    TCGv_i64 tcg_imm;

    if (!sf && (pos >= 32)) {

        unallocated_encoding(s);

        return;

    }

    switch (opc) {

    case 0: /* MOVN */

    case 2: /* MOVZ */

        imm <<= pos;

        if (opc == 0) {

            imm = ~imm;

        }

        if (!sf) {

            imm &= 0xffffffffu;

        }

        tcg_gen_movi_i64(tcg_rd, imm);

        break;

    case 3: /* MOVK */

        tcg_imm = tcg_const_i64(imm);

        tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_imm, pos, 16);

        tcg_temp_free_i64(tcg_imm);

        if (!sf) {

            tcg_gen_ext32u_i64(tcg_rd, tcg_rd);

        }

        break;

    default:

        unallocated_encoding(s);

        break;

    }