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Re: [PATCH 1/14] [x86_64] Vector math functions (vector cos)
- From: Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>
- To: Joseph Myers <joseph at codesourcery dot com>
- Cc: libc-alpha <libc-alpha at sourceware dot org>
- Date: Mon, 8 Jun 2015 19:07:09 +0300
- Subject: Re: [PATCH 1/14] [x86_64] Vector math functions (vector cos)
- Authentication-results: sourceware.org; auth=none
- References: <CAMXFM3t+v7zYEmvWQxV9aRmJB6Ag2hQgQ56cZJTDy=siRBszDw at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1505151616460 dot 21212 at digraph dot polyomino dot org dot uk> <CAMXFM3tfZKDJtjhJ1d=LQ=WALJBBx5ABJXoS5ycBORii78FkEg at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1505181711240 dot 20209 at digraph dot polyomino dot org dot uk> <CAMXFM3vG=5KVLuG4HJ6StDp13YcpeRLqPkd=3BJhGt1mu5AWPA at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1505201529070 dot 23246 at digraph dot polyomino dot org dot uk> <CAMXFM3u57e==ySd8TF7+qFwmrswcT1jqzcN-n_JDPF45+77Z0g at mail dot gmail dot com> <CAMXFM3uuDy3f2hb3Xg+MNmseqjmBFqUF1euRF_g5XW+wo7JSSQ at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1505221523570 dot 16611 at digraph dot polyomino dot org dot uk> <CAMXFM3sXNLR3_HPpkUBp_9Ue=-RYZYoidbCwP23Cp9HX_X+t5A at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1506041649010 dot 12011 at digraph dot polyomino dot org dot uk> <CAMXFM3uCXy6WS6xDNzWhjdHYAfYUen3srj1RdpBsb1vCfB_25Q at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1506051642580 dot 26931 at digraph dot polyomino dot org dot uk> <CAMXFM3tFo1KU3y-55zzWVdT9GAG_ND15_ZwGNkZQVp2TCoBgJA at mail dot gmail dot com> <alpine dot DEB dot 2 dot 10 dot 1506081302340 dot 25225 at digraph dot polyomino dot org dot uk>
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.
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.
^L
Version 2.21
--
WBR,
Andrew