libosmocore[master]: core/conv: add x86 SSE support for Viterbi decoder

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Tom Tsou gerrit-no-reply at lists.osmocom.org
Fri May 19 18:26:56 UTC 2017


Patch Set 9:

(1 comment)

https://gerrit.osmocom.org/#/c/2454/9/src/viterbi_sse.c
File src/viterbi_sse.c:

PS9, Line 68: M3 = _mm_or_si128(_mm_cmpgt_epi16(M3, M4), _mm_cmpeq_epi16(M3, M4));
Same >= vs > handling that we saw in the non-SSE case. SSE does not provide a signed 16-bit integer greater than or equal to instruction, so we use this chained combination.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I1da6d71ed0564f1d684f3a836e998d09de5f0351
Gerrit-PatchSet: 9
Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Alexander Chemeris <Alexander.Chemeris at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Max <msuraev at sysmocom.de>
Gerrit-Reviewer: Tom Tsou <tom at tsou.cc>
Gerrit-Reviewer: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: dexter <pmaier at sysmocom.de>
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