Georg-Johann Lay schrieb:

> To come back to the original topic, here is a tentative patch for
> better popcount and parity:
> 
> 	* config/avr/t-avr (LIB1ASMFUNCS): Rename _loop_ffsqi2 to
> 	_ffsqi2_nz.
> 	* confif/avr/libgcc.S: Ditto. Rename __loop_ffsqi2 to __ffsqi2_nz.
> 	(__ctzsi2, __ctzhi2): Map zero to 255.
> 	(__popcounthi2): Use r27 instead of r30.
> 	(__popcountdi2): Use r30 instead of r27.
> 	* config/avr/avr.md (parityhi2): New expander.
> 	(popcounthi2): New expander.
> 	(popcountsi2): New expander.
> 	(*parityhi2.libgcc): New insn.
> 	(*parityqihi2.libgcc): New insn.
> 	(*popcounthi2.libgcc): New insn.
> 	(*popcountsi2.libgcc): New insn.
> 	(*popcountqi2.libgcc): New insn.
> 	(*popcountqihi2.libgcc): New insn_and_split.
> 
> Johann

Oops, picked the wrong file.