[Qemu-devel] [Aarch64] Bug in add/sub extended reg

[Laurent Desnogues]

Hello,

there's a bug in SP handling in disas_add_sub_ext_reg:

    /* non-flag setting ops may use SP */
    if (!setflags) {
        tcg_rn = read_cpu_reg_sp(s, rn, sf);
        tcg_rd = cpu_reg_sp(s, rd);
    } else {
        tcg_rn = read_cpu_reg(s, rn, sf);
        tcg_rd = cpu_reg(s, rd);
    }

rn can always be SP no matter whether flags are set or not.

Thanks,

Laurent