> -----Original Message----- > From: Georg-Johann Lay > Sent: Friday, February 08, 2013 5:53 AM > To: gcc-patches@gcc.gnu.org > Cc: Denis Chertykov; Weddington, Eric > Subject: [Patch,avr] Implement PR56254 > > This adds variable delays to __builtin_avr_delay_cycles. > > Is this okay? >
What does this do? How does it work? Could you explain the statement in the documentation "if ticks is not a compile-time constant, the delay might be overestimated by up to 15 cycles". Why would we want to do that? I thought the whole point of a builtin delay cycles function was to have an accurate delay. Eric
