what's the purpose of Perl_mod() ?

Dumb question of the week: What is the purpose of Perl_mod() in op.c?
What does it do, and why?

Confused of Sheffield(*)(+).

(*) Well actually, it's of San Jose for the next week.
(+) aka Full Monty Country.

-- 
"Do not dabble in paradox, Edward, it puts you in danger of fortuitous
wit." Lady Croom - Arcadia

• what's the purpose of Perl_mod() ? by Dave Mitchell
• Re: what's the purpose of Perl_mod() ? by Stephen McCamant
• Re: what's the purpose of Perl_mod() ? by Dave Mitchell
• Re: what's the purpose of Perl_mod() ? by Stephen McCamant