[1/14,x86_64] Vector math functions (vector cos)
Commit Message
2015-06-05 19:44 GMT+03:00 Joseph Myers <joseph@codesourcery.com>:
> Note that the addition of the first libmvec functions should be
> accompanied by a NEWS entry describing this new feature in 2.22. (That
> NEWS entry can then be updated for each new function added - of course
> anything added after 2.22 is released gets a separate NEWS entry for
> 2.23.)
Is this update ok?
I also would like to add wiki page (with content mostly based on
https://sourceware.org/glibc/wiki/libm#Addition_of_x86_64_vector_math_functions_to_Glibc)
to 5.4. Internals Documentation at
https://sourceware.org/glibc/wiki#Development and add according link
to NEWS.
--
WBR,
Andrew
Comments
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.
@@ -50,6 +50,12 @@ 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.
+ 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.
^L
Version 2.21