Follow-up Comment #3, bug #12739 (project avr-libc):
I've had a look at your functions.
Very good! Most interesting for me has been that there is this
__builtin_constant_p () function! Very useful!
Did not know that beforehand.
Suggestion from my side concerning the implementation is:
I'd try to make the function as efficient as a *real* builtin function of gcc
by defining
char ffs inline (int param)
{
inline asm stating in which registers to pass parameters
and which registers are actually clobbered.
}
Possibly this way one could also remove things like the
"clr r25" for the zero-extension that possibly is not necessary.
I'll think about that and send a more detailed suggestion.
Yours,
Bj�rn
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