[PATCH 1/N] x86_64 vectorization support: vectorized math functions addition to Glibc

[H.J. Lu]

On Tue, Sep 16, 2014 at 9:56 AM, Andrew Senkevich
<andrew.n.senkevich@gmail.com> wrote:
> Hi all,
>
> I have added information on Enhancing libm page -
> https://sourceware.org/glibc/wiki/libm#Addition_of_x86_64_vector_math_functions_to_Glibc
>

The wiki says:

3.1. Goal

Main goal is to improve vectorization of GCC with OpenMP4.0 SIMD
constructs (#2.8 in http://www.openmp.org/mp-documents/OpenMP4.0.0.pdf
and Cilk Plus constructs (6-7 in
http://www.cilkplus.org/sites/default/files/open_specifications/Intel_Cilk_plus_lang_spec_1.2.htm)
on x86_64 by adding SSE4, AVX and AVX2 vector implementations of
several vector math functions (float and double versions). AVX-512
versions are planned to be added later. These functions can be also
used manually (with intrincics) by developers to obtain speedup.

It is the opposite of

https://sourceware.org/ml/libc-alpha/2014-09/msg00277.html

which is for programmers to use them directly in their
applications, mostly independent of compilers.

We need to come to an agreement on what goal is first.

-- 
H.J.