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Re: [PATCH 2/2, i386]: Implement TARGET_EXPAND_DIVMOD_LIBFUNC
- From: Uros Bizjak <ubizjak at gmail dot com>
- To: Eric Botcazou <ebotcazou at adacore dot com>
- Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 3 Nov 2016 13:47:36 +0100
- Subject: Re: [PATCH 2/2, i386]: Implement TARGET_EXPAND_DIVMOD_LIBFUNC
- Authentication-results: sourceware.org; auth=none
- References: <CAFULd4ZSMEBPKSTCPS8R=AMAo+nuEq34h3nW6JU27pKYj8T4dQ@mail.gmail.com> <17852569.a8SlU3KEQc@polaris> <CAFULd4b8cspu1-YqoFd4JchCVKBAg7+VveAGyq8MKSGB+0+K3A@mail.gmail.com> <2310401.5T5cJgJx99@polaris>
On Thu, Nov 3, 2016 at 1:18 PM, Eric Botcazou <ebotcazou@adacore.com> wrote:
>> libfunc is already implemented for all targets to use, there is also:
>>
>> OPTAB_NC(sdivmod_optab, "divmod$a4", UNKNOWN)
>> OPTAB_NC(udivmod_optab, "udivmod$a4", UNKNOWN)
>>
>> in optabs.def that can probably be changed for generic expansion.
>
> So what's the purpose of ix86_init_libfuncs if the libfuncs are already there?
libfunc, as in "__{,u}divmod{di,ti}4 library function" is already
implemented in libgcc. But the enablement of this function inside the
compiler has to be performed by each target.
Uros.