> -----Original Message----- > From: > avr-libc-dev-bounces+eric.weddington=atmel....@nongnu.org > [mailto:avr-libc-dev-bounces+eric.weddington=atmel....@nongnu. > org] On Behalf Of Joerg Wunsch > Sent: Friday, February 12, 2010 5:35 PM > To: Soren Jorvang; Joerg Wunsch; avr-libc-dev@nongnu.org > Subject: [avr-libc-dev] [bug #28881] nop() macro for NOP instruction > > > Follow-up Comment #1, bug #28881 (project avr-libc): > > You guessed it: there's no real place for the nop() macro > to go into. That's the main reason it's not yet there. >
I agree that there is not a convenient place to put such a macro. But I would also argue now that we do not need to have such a macro in avr-libc. The only use for the NOP instruction is for some sort of delay, typically by a specific number of cycles. This has been available via patches to GCC for a while now. These patches add intrinsic functions to the AVR port of GCC and one of those intrinsic functions allows the user to delay a specified number of cycles. GCC will then generate inline code to do this which takes advantage of NOP and other instructions to implement this. These patches are included in the WinAVR release, and should be available in other distributions, though I haven't checked on other platforms. _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
