Use `uvm_do macro from uvm_test

UVM
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3

In reply to warnerrs:

Hi thanks for the explanation, I appreciate it.
Still it’s disappointing that it doesn’t work from uvm_test, calling a sequence from a testcase is probably the most common action in verification… Not having an concise way to do that is unfortunate.

I did try rewriting it but encountered additional problems. Seq.create() must be used instead of create_item, this requires knowledge of the sequence type. We also need to know where the macro was called from. Is it possible to access this information without a reflection mechanism?

Here’s an attempt at it but maybe a lost cause. start_item/finish_item will give compile error when used in uvm_test.

  1. 1st branch uses create, randomize, start and the
  2. 2nd branch uses create_item, randomize, start_item, finish_item

`define uvm_do_from_test(SEQ_TYPE, SEQ_OR_ITEM, SEQR, PRIORITY, CONSTRAINTS) \
   begin \
   uvm_sequence_base __seq; \
     if (this.get_full_name() == "uvm_test_top") begin \
       SEQ_OR_ITEM = SEQ_TYPE::type_id::create(\"SEQ_OR_ITEM\"); \
       if (!(SEQ_OR_ITEM.randomize() with CONSTRAINTS)) \
          `uvm_fatal(get_type_name(),$sformatf("Sequence randomization failed")) \
       SEQ_OR_ITEM.start(SEQR); \
     end else begin \
       `uvm_create_on(SEQ_OR_ITEM, SEQR) \
       if (!$cast(__seq,SEQ_OR_ITEM)) start_item(SEQ_OR_ITEM, PRIORITY); \
       if (!(SEQ_OR_ITEM.randomize() with CONSTRAINTS)) \
          `uvm_fatal(get_type_name(),$sformatf("Sequence randomization failed")) \
       if (!$cast(__seq,SEQ_OR_ITEM)) finish_item(SEQ_OR_ITEM, PRIORITY); \
     end \
   end