http://gcc.gnu.org/ml/gcc-patches/2011-12/msg00471.html
Georg-Johann Lay wrote: > Georg-Johann Lay wrote: >> Denis Chertykov wrote: >> >>>>>> The only question that remains is what the -m64 option should be like? >>>>>> >>>>>> [ ] Omit it altogether >>>>>> [ ] Leave it as is (off per default) >>>>>> [ ] Set it on per default >>>>>> >>>>>> As soon as the direction is clear, I'll post a follow-up patch to >>>>>> add the missing bits like, e.g., documentation for the new switch. >>>>> I'll leave the decision to Denis, but I'm for omitting it. >>>> I will also defer to Denis, but I'd rather avoid having another option, >>>> if we can. Keep it simple for the users. >> It might also be a hidden option like -morder2 and on per default. >> Such thing is nice for developers to play :-) >> >>> I'm agree with Richard. I'm for omitting it. >>> Denis. > > Here is a combined patch if that is more convenient for review. > > The variable avr_have_dimode that was originally set in avr.opt is still there > but always set to true in avr.c. Option -m64 is omitted and thus avr.opt is > unchanged. > > Passed without regressions. > > Ok? > > Johann > > gcc/ > * config/avr/avr-dimode.md: New file. > * config/avr/avr.md: Include it. > (adjust_len): Add alternatives: plus64, compare64. > (HIDI): Remove code iterator. > (code_stdname): New code attribute. > (rotx, rotsmode): Remove DI from interators. > (rotl<mode>3, *rotw<mode>, *rotb<mode>): Use HISI instead of HIDI > as code iterator. > * config/avr/avr-protos.h (avr_have_dimode): New. > (avr_out_plus64, avr_out_compare64): New. > * config/avr/avr.c (avr_out_compare): Handle DImode. > (avr_have_dimode): New variable definition and initialization. > (avr_out_compare64, avr_out_plus64): New functions. > (avr_out_plus_1): Use simplify_unary_operation to negate xval. > (adjust_insn_length): Handle ADJUST_LEN_COMPARE64, ADJUST_LEN_PLUS64. > (avr_compare_pattern): Skip DImode comparisons. > > libgcc/ > * config/avr/t-avr (LIB1ASMFUNCS): Add _adddi3, _adddi3_s8, > _subdi3, _cmpdi2, _cmpdi2_s8, _rotldi3. > * config/avr/lib1funcs.S (__adddi3, __adddi3_s8, __subdi3, > __cmpdi2, __cmpdi2_s8, __rotldi3): New functions. >
