> -----Original Message----- > From: > [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > org] On Behalf Of Jeff Barlow > Sent: Thursday, April 10, 2008 9:10 AM > To: avr-gcc-list@nongnu.org > Subject: Re: [avr-gcc-list] Odd prologue for ATmega256x in > WinAVR20080407 > > Stu Bell <[EMAIL PROTECTED]> wrote: > > >What does the double "rcall ." do? > > It just adjusts the stack pointer prior to loading it as the > local frame pointer. It's a fairly cute optimization actually. >
Hi Stu, Don't feel bad. When I first saw this, I thought the same thing: "Huh?, What's this?" After some quick double checking in the instruction set manual, it finally made sense. I agree with Jeff, it's quite a trick optimization. Thanks go to Anatoly Sokolov. ;-) _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
