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Re: [i386, patch, RFC] HLE support in GCC

From: Uros Bizjak <ubizjak at gmail dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: Kirill Yukhin <kirill dot yukhin at gmail dot com>, "H.J. Lu" <hjl dot tools at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Richard Henderson <rth at redhat dot com>
Date: Tue, 10 Apr 2012 19:05:21 +0200
Subject: Re: [i386, patch, RFC] HLE support in GCC
References: <CAGs3Rfu6kiQhDPXy_QmEyKzs-FXPO9i74VUEUPoHX0WiEaz_iA@mail.gmail.com> <20120307111008.GK16117@tyan-ft48-01.lab.bos.redhat.com> <CAMe9rOqC1fckmVN9MOXWMhG-2jhHYtGCsrXCdT4ZDgp1J39Msw@mail.gmail.com> <CAGs3Rft_0Cs6v3AP_LH2tbbqrym5rf1A4MJ+6fn1T37=BEzrbw@mail.gmail.com> <CAMe9rOqKWyfumpjuLyNGwAxdfzU9XmMDcj0vq4t1CefKJZtg5w@mail.gmail.com> <20120308150912.GS16117@tyan-ft48-01.lab.bos.redhat.com> <CAGs3RftVUdWy=jqfonJFLsyuT6mWjm_0Bdc2Dqjgtd9qNGDRXA@mail.gmail.com> <20120410142020.GW16117@tyan-ft48-01.lab.bos.redhat.com>

On Tue, Apr 10, 2012 at 4:20 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Tue, Apr 10, 2012 at 06:12:08PM +0400, Kirill Yukhin wrote:
>> Attached patch implements HLE support for __atomic_compare_exchange_n.
>
> The target hook is definitely not appropriate, just define it in
> ix86_target_macros in i386-c.c instead or so.

Also, I think it is better to pass operand that holds the model
constant to the final insn and conditionally output xacquire/xrelease
based on INTVAL of this operand.

Something like in attached patch, but probably with a helper function in i386.c.

Uros.

Attachment: h.diff.txt
Description: Text document

References:
- Re: [i386, patch, RFC] HLE support in GCC
  - From: Kirill Yukhin
- Re: [i386, patch, RFC] HLE support in GCC
  - From: Jakub Jelinek

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