Change in libosmocore[master]: libomsocoding: NEON viterbi acceleration

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Hoernchen gerrit-no-reply at lists.osmocom.org
Thu Jul 23 14:16:18 UTC 2020


Hello fixeria, laforge, Jenkins Builder, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/c/libosmocore/+/19372

to look at the new patch set (#2).

Change subject: libomsocoding: NEON viterbi acceleration
......................................................................

libomsocoding: NEON viterbi acceleration

configure flag required to enable this: --enable-neon

Although autodetection according to __ARM_NEON would work because this
is only defined if the fpu is neon neon-fp16 neon-vfpv3 neon-vfpv4
neon-fp-armv8 crypto-neon-fp-armv8 doing that would lead to a unknown
performance impact, so it needs to be enabled manually.

Speedup is about ~1.3-1.5 on a unspecified single core Cortex A9. This
requires handling a special case for RACH with len 14 which is far too
short for neon and would actually incur a performance penalty of 25%.

Change-Id: I58ff2cb4ce3514f43390ff0a2121f81e6a4983b5
---
M configure.ac
M src/Makefile.am
M src/conv_acc.c
A src/conv_acc_neon.c
A src/conv_acc_neon_impl.h
5 files changed, 508 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/72/19372/2
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I58ff2cb4ce3514f43390ff0a2121f81e6a4983b5
Gerrit-Change-Number: 19372
Gerrit-PatchSet: 2
Gerrit-Owner: Hoernchen <ewild at sysmocom.de>
Gerrit-Reviewer: Hoernchen <ewild at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanitskiy at sysmocom.de>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-CC: pespin <pespin at sysmocom.de>
Gerrit-MessageType: newpatchset
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