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* uhd: Update license headersMartin Braun2018-02-191-1/+2
| | | | | | | All copyright is now attributed to "Ettus Research, a National Instruments company". SPDX headers were also updated to latest version 3.0.
* Move all license headers to SPDX format.Martin Braun2017-12-221-12/+1
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* convert: Add SSE implementation for sc12Tom Tsou2017-07-251-0/+123
Implementation uses SSSE3 intructions to perform 12-bit sample pack/unpack operations to/from standard 16 and 32 bit host values. Input/output shuffle orderings for a single 128-bit SSE register with 16-bit integers shown below. 16-bit interleaved I/Q --------------------------------------- | Q3 | I3 | Q2 | I2 | Q1 | I1 | Q0 | I0 | Input --------------------------------------- | 127 0 | 12-bit packed I/Q byteswapped ----------------------- | I0 | Q0 | I1 | 0 |-----------------------| | I1 | Q1 | I2 | Q2 | Output |-----------------------| | Q2 | I3 | Q3 | |-----------------------| | Unused | 3 ----------------------- 31 0 Fixes: #1740, #966 Related: #1739