tree ebb7bcd4dd9c494106096384327db0122a4fde01
parent b6c8dda5e34df6b74183ad24cf66c98601065e56
author Tom Tsou <tom.tsou@ettus.com> 1493399803 +0700
committer Harald Welte <laforge@gnumonks.org> 1495663493 +0000

core/conv: add x86 SSE support for Viterbi decoder

Fast convolutional decoding is provided through x86 intrinsic based
SSE operations. SSE3, found on virtually all modern x86 processors,
is the minimal requirement. SSE4.1 and AVX2 are used if available.

Also, the original code was extended with runtime SIMD detection,
so only supported extensions will be used by target CPU. It makes
the library more partable, what is very important for binary
packages distribution. Runtime SIMD detection is currently
implemented through the __builtin_cpu_supports call.

Change-Id: I1da6d71ed0564f1d684f3a836e998d09de5f0351