Re: [PATCH 2/2, i386]: Implement TARGET_EXPAND_DIVMOD_LIBFUNC

[Eric Botcazou]

> I guess it can be done. Currently the expander goes:
> 
> --cut here--
>   /* Check if optab_handler exists for divmod_optab for given mode.  */
>   if (optab_handler (tab, mode) != CODE_FOR_nothing)
>     {
>       quotient = gen_reg_rtx (mode);
>       remainder = gen_reg_rtx (mode);
>       expand_twoval_binop (tab, op0, op1, quotient, remainder, unsignedp);
>     }
> 
>   /* Generate call to divmod libfunc if it exists.  */
>   else if ((libfunc = optab_libfunc (tab, mode)) != NULL_RTX)
>     targetm.expand_divmod_libfunc (libfunc, mode, op0, op1,
>                    &quotient, &remainder);
> 
>   else
>     gcc_unreachable ();
> --cut here--
> 
> so, by declaring divmod libfunc, the target also has to provide target hook.

Right, that's why I also suggested a default associated target hook.

-- 
Eric Botcazou