[1/14,x86_64] Vector math functions (vector cos)
Commit Message
2015-06-08 16:06 GMT+03:00 Joseph Myers <joseph@codesourcery.com>:
> On Mon, 8 Jun 2015, Andrew Senkevich wrote:
>
>> +* Added vector math library named libmvec with the following vectorized x86_64
>> + implementations: cos.
>> + Naming of x86_64 implementations is in accordance with
>> + Vector ABI <https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>.
>> + Vector math library build and ABI testing enabled by default for x86_64.
>
> I don't think the NEWS file should point to a site requiring non-free
> JavaScript; host a copy of the ABI somewhere else (maybe on the glibc
> wiki).
>
> I think the NEWS file needs to give information from the perspective of
> people building and using glibc. That includes: the library can be
> disabled with --disable-mathvec (the configure option also needs
> documenting in manual/install.texi, with INSTALL being regenerated); use
> of the functions is enabled with -fopenmp -ffast-math -O3 (or whatever)
> and the library is linked in as needed when using -lm rather than needing
> to specify -lmvec explicitly.
I have prepared wiki page and put link to it.
--
WBR,
Andrew
Comments
On Mon, 8 Jun 2015, Andrew Senkevich wrote:
> diff --git a/NEWS b/NEWS
> index 881e61c..5e223a1 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -50,6 +50,14 @@ Version 2.22
> * CVE-2014-8121 The NSS backends shared internal state between the getXXent
> and getXXbyYY NSS calls for the same database, causing a denial-of-service
> condition in some applications.
> +
> +* Added vector math library named libmvec with the following vectorized x86_64
> + implementations: cos.
> + The library can be disabled with --disable-mathvec. Use of the functions is
> + enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
> + The library is linked in as needed when using -lm (no need to specify -lmvec
> + explicitly).
> + Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
This seems reasonable as a starting point (given install.texi updated as
well). The release manager may wish to edit the NEWS entries, of course.
@@ -50,6 +50,14 @@ Version 2.22
* CVE-2014-8121 The NSS backends shared internal state between the getXXent
and getXXbyYY NSS calls for the same database, causing a denial-of-service
condition in some applications.
+
+* Added vector math library named libmvec with the following vectorized x86_64
+ implementations: cos.
+ The library can be disabled with --disable-mathvec. Use of the functions is
+ enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
+ The library is linked in as needed when using -lm (no need to specify -lmvec
+ explicitly).
+ Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
^L
Version 2.21