DescriptionQ679
Q679DVASIC interview problem
Pack and unpack ordering
TechniquesUVMCopy, compare, and pack
DifficultyMedium
TopicUVM Components
LanguageSystemVerilog
Format4 choices
01
Problem
A packet packs addr first and len second, but unpacks len first and addr second. The total bit count matches. What is the correct diagnosis?
Function headerSystemVerilog
function void do_pack(uvm_packer p);
super.do_pack(p);
p.pack_field_int(addr, 16);
p.pack_field_int(len, 8);
endfunction
function void do_unpack(uvm_packer p);
super.do_unpack(p);
len = p.unpack_field_int(8);
addr = p.unpack_field_int(16);
endfunction02