Is there one default offset of one sub addrmap?

[peidongbin]

addrmap sub_map0{
    default regwidth = 32;
    <% for($i = 0; $i < 76; $i = $i +1 ){ %>
        reg  {
            field {} a[5];
        } reg_<%=$i%>;
    <% }%>
};
addrmap sub_map1{
    default regwidth = 32;
    <% for($i = 0; $i < 76; $i = $i +1 ){ %>
        reg  {
            field {} a[5];
        } reg_<%=$i%>;
    <% }%>
};
addrmap top{
 sub_map0 sub0;
 sub_map1 sub1;
};

Here is one example , i found the addr of sub1 not start with the end of sub0. is there one default of sub map ?

[amykyta3]

The default address packing behavior is to align objects to offsets based on their size, rounded up to the next power-of-two. Therefore the sub1 instance is allocated to an address of 0x200.
If you want tight packing, you can use the addressing = compact; property.
Also, in your example there is no need to use Perl preprocessing. Instead you can use an array of registers:

addrmap sub_map0{
    default regwidth = 32;
    reg {
        field {} a[5];
    } myreg[76];
};
addrmap sub_map1{
    default regwidth = 32;
    reg {
        field {} a[5];
    } myreg[76];
};
addrmap top{
    addressing = compact;
    sub_map0 sub0;
    sub_map1 sub1;
};

Alternatively, you can assign the addresses explicitly:

addrmap top{
    sub_map0 sub0 @ 0x000;
    sub_map1 sub1 @ 0x130;
};

I prefer explicit address allocation since it is more obvious how addresses will be allocated.

[peidongbin]

thank ！