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Re: define MMX/SSE intrinsics without requiring cmdline isa flags

From: Andi Kleen <andi at firstfloor dot org>
To: "H.J. Lu" <hjl dot tools at gmail dot com>
Cc: Xinliang David Li <davidxl at google dot com>, Andi Kleen <andi at firstfloor dot org>, GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 19 Aug 2010 18:18:53 +0200
Subject: Re: define MMX/SSE intrinsics without requiring cmdline isa flags
References: <AANLkTin4cOUfK1kdKwErUpqPTVAzxL8utA0why3Gxa_O@mail.gmail.com> <87eiduu7pq.fsf@basil.nowhere.org> <AANLkTim9LvcTx5Vg7GR6fbxe2XZ1u--fDSd2KdY2ujWa@mail.gmail.com> <AANLkTikqBKFe0WhjT-e73LSKhDwCw3dwpXx-Fb17jqmk@mail.gmail.com>

> The whole target attribute is very fragile:
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37565
> 
> There is another issue with intrinsics:
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39840
> 
> I don't think we should add more kludges to the current
> scheme. I suggest you open a bug with your concern. We

It will be used for gcc itself soon, as soon as Richard
commits the vectorized cpp_cleanline.

Right now that works around these (and other) issues by using 
__builtin_* directly.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.

References:
- define MMX/SSE intrinsics without requiring cmdline isa flags
  - From: Xinliang David Li
- Re: define MMX/SSE intrinsics without requiring cmdline isa flags
  - From: Andi Kleen
- Re: define MMX/SSE intrinsics without requiring cmdline isa flags
  - From: Xinliang David Li
- Re: define MMX/SSE intrinsics without requiring cmdline isa flags
  - From: H.J. Lu

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