dwarfRegisterBytes

    pub fn dwarfRegisterBytes(ctx: *Ve, register_num: u16) DwarfRegisterError![]u8 {
        switch (register_num) {
            0...63 => return @ptrCast(&ctx.s[register_num]),
            144 => return @ptrCast(&ctx.ic),

            64...127 => return error.UnsupportedRegister, // v0 - v63
            128...143 => return error.UnsupportedRegister, // vm0 - vm15

            else => return error.InvalidRegister,
        }
    }