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*From*: "H.J. Lu" <hjl dot tools at gmail dot com>*To*: Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>*Cc*: "Joseph S. Myers" <joseph at codesourcery dot com>, libc-alpha <libc-alpha at sourceware dot org>*Date*: Thu, 25 Sep 2014 08:40:29 -0700*Subject*: Re: [RFC] How to add vector math functions to Glibc*Authentication-results*: sourceware.org; auth=none*References*: <CAMXFM3tjquzniXP1weqxSVFJyhXqsf2PHuyrrrmqp7K0ZzORqA at mail dot gmail dot com> <CAMXFM3sGMNX1DEPAMt7qUR4UREF_xUAQjCG1OjBiZH2aoOFiPA at mail dot gmail dot com> <Pine dot LNX dot 4 dot 64 dot 1409181551370 dot 31607 at digraph dot polyomino dot org dot uk> <CAMXFM3tO7MTYCq8-YFZacdbLvR4iAab_n04AuB+rp2Phs4BvQg at mail dot gmail dot com> <Pine dot LNX dot 4 dot 64 dot 1409242011260 dot 7597 at digraph dot polyomino dot org dot uk> <CAMXFM3tqiqUNuSU2KXvAFM-QescX3+6xUO9=z5X0Ac6C9qJ7zg at mail dot gmail dot com>

On Thu, Sep 25, 2014 at 8:17 AM, Andrew Senkevich <andrew.n.senkevich@gmail.com> wrote: >> If consensus ends up being to have such a library (libmvec or libmvect?), >> then the installation rules for libm.so as a linker script should go in >> math/Makefile, not the toplevel Makerules. (I don't know what if any >> changes might be needed to allow subdirectories to provide libraries as >> linker scripts.) > > There were three options about the place where to add vectorized math functions: > > 1. GLIBC (libm) > 2. GLIBC (additional library) > 3. GCC > > In GLIBC cases build of vectorized functions can be conditional, no > additional -lmvec required because of libm.so installed as linked > script in case of vectorized functions available, so it seems not very > important whether functions located in additional library or in libm. > I don't think they should be in libm since most of applications won't use those vector functions, which increase libm size unnecessarily. A separate library is better. -- H.J.

**Follow-Ups**:**Re: [RFC] How to add vector math functions to Glibc***From:*Carlos O'Donell

**References**:**[RFC] How to add vector math functions to Glibc***From:*Andrew Senkevich

**Re: [RFC] How to add vector math functions to Glibc***From:*Andrew Senkevich

**Re: [RFC] How to add vector math functions to Glibc***From:*Joseph S. Myers

**Re: [RFC] How to add vector math functions to Glibc***From:*Andrew Senkevich

**Re: [RFC] How to add vector math functions to Glibc***From:*Joseph S. Myers

**Re: [RFC] How to add vector math functions to Glibc***From:*Andrew Senkevich

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