[sv-bc] streaming operator unpack doubt

What should be the results of streaming operator unpack if there is more
than we need bits on RHS
LRM:
'If the source expression contains more bits than are needed, the
appropriate number of bits shall be consumed from its left (most
significant) end."
But does LRM mean that we need to take appropriate number of bits from
source expression or from reordered stream.
So attached example should print:

    1z0
    0z1

or

    1z0
    x0z

Example

    module top;
    reg [4:1] b1;
    reg [5:1] d;
    initial
    begin
         #1 b1='b1z0x;
           {>>{c}} =b1; $display("c=%b ",c);
         #1 b1='b1z0x;
           {<<{c}} =b1; $display("c=%b ",c);
    end
    endmodule

DANiel

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.