This is the mail archive of the libc-alpha@sourceware.org mailing list for the glibc project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] BZ #14649: Add multiarch FMA support to x86-64 libm


On 10/01/2012 05:14 PM, H.J. Lu wrote:
Hi,

This patch adds multiarch FMA support to x86-64 libm.  Tested on
FMA machine.  OK for master?

What kind of performance benefits does it bring us? Are you sure that all the functions you enhance are really using fma and thus benefit from the change?


Btw. are there any processors that have both fma variants in hardware - or is it at most one of them?

Andreas
--
 Andreas Jaeger aj@{suse.com,opensuse.org} Twitter/Identica: jaegerandi
  SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
   GF: Jeff Hawn,Jennifer Guild,Felix Imendörffer,HRB16746 (AG Nürnberg)
    GPG fingerprint = 93A3 365E CE47 B889 DF7F  FED1 389A 563C C272 A126


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]