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generate of specman (vs) randomize of systemverilog

onkarkk

Hi,

Could any one please explain me clearly steps of generate and randomize and their significance.

i.e ., in generate it is told there is pre-generate and post-generate methods i could not understand clearly why they required.

In the same way in randomize() also there are pre_randomize() and post_randomize() methods will be invoked , i didnt get sufficient clarity on their explanation .. could any 

one please clarify the significance of those methods.

Thanks in advance,

regards

Krishna Kishore 

Parents

  • Dear Stephen,

    I too feel e bit convenient than SV (with my little knowledge),  thats ok , thanks for your reply i am going through documents but not like sn_help.sh (i dont know why , it is not working on my system , yes i didnt put much concentration on it i will look at it),  from ur post what i understood is

    1. pre_ method will create some memory for random variables  ---->  my understanding is correct ??

    2. "It can be hard and inefficient to do this with constraints especially if your object has many optional fields" -- could u please elaborate it ..

    3. You have used post_generate method to calculate crc when there is an error , cant i use custom method say good_crc() instead of post_generate() , i.e, like pre_generate , post_generate also create some momory or like that??

    Please correct me if i am wrong ....

    Thanks in advance

    regards

    Krishna Kishore

     

Reply

  • Dear Stephen,

    I too feel e bit convenient than SV (with my little knowledge),  thats ok , thanks for your reply i am going through documents but not like sn_help.sh (i dont know why , it is not working on my system , yes i didnt put much concentration on it i will look at it),  from ur post what i understood is

    1. pre_ method will create some memory for random variables  ---->  my understanding is correct ??

    2. "It can be hard and inefficient to do this with constraints especially if your object has many optional fields" -- could u please elaborate it ..

    3. You have used post_generate method to calculate crc when there is an error , cant i use custom method say good_crc() instead of post_generate() , i.e, like pre_generate , post_generate also create some momory or like that??

    Please correct me if i am wrong ....

    Thanks in advance

    regards

    Krishna Kishore

     

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