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Re: PATCH: Mention x86 configure changes for gcc 4.5.0
On Sun, Feb 28, 2010 at 12:38 PM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On 02/27/2010 05:43 PM, H.J. Lu wrote:
>
>>>> This is not a review of this patch, but I think there are *many* more
>>>> x86
>>>> changes in 4.5 that are not mentioned in changes.html and should be, and
>>>> I
>>>> hope the x86 maintainers, or the contributors of those changes, will add
>>>> them.
>>>>
>>>>
>>>
>>> At least<x86intrin.h> ?should be mentioned. There is also whole lot of
>>> contributed code with user-visible compile flag that definitely deserves
>>> a
>>> line or two in changes.html (H.J and Sebastian - can you please add
>>> something about these?):
>>>
>>> mfma
>>> Target Report Mask(ISA_FMA) Var(ix86_isa_flags) VarExists
>>> Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and FMA built-in
>>> functions and code generation
>>>
>>
>> That is in gcc 4.4.
>>
>
> [...]
>
>> That is in gcc 4.4.
>>
>
> Really? Where are they mentioned? [1]?
>
> [1] http://gcc.gnu.org/gcc-4.4/changes.html
>
-maes and mpclmul are mentioned. There is no current processor
which supports FMA and FMA code generation is incomplete.
So I decided not to mention -mfma. I am planning to submit FMA
code generation patch for gcc 4.6.
I don't know why others aren't.
--
H.J.