Yes, would have come is the standard form. The use of "would have came" would be categorized as incorrect, sub-standard or a typo.

Would come VS would have come?

The first indicates that he said he would come. Bill said to me, "I will come". The second indicates that he was unable to come, but would have come if circumstances had permitted it, for example if he had known about it, or had not had another commitment, etc. Bill said to me, "I wish you had told me!

What tense is would have come?

These past tense modals are useful for expressing your present feelings about a past decision (or other action). Could have, would have, and should have are sometimes called “modals of lost opportunities.” They work like a grammatical time machine. The simple past just tells what happened.