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//
// Copyright 2017 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include "convert_unpack_sc12.hpp"
#include <emmintrin.h>
#include <tmmintrin.h>
using namespace uhd::convert;
/*
* Shuffle Orderings - Single 128-bit SSE register
*
* 12-bit packed I/Q byteswapped
* -----------------------
* | I0 | Q0 | I1 | 0
* |-----------------------|
* | I1 | Q1 | I2 | Q2 | Input
* |-----------------------|
* | Q2 | I3 | Q3 | 2
* -----------------------
* 31 0
*
*
* 12-bit interleaved packed I/Q
* ---------------------------------------
* |I0|Q0|I1|Q1|I2|Q2|I3|Q3| | Byteswap Removed
* ---------------------------------------
* | 127 32 | 31 Empty 0 |
*
*
* Packed Unpacked
* Sample Index Index Offset
* =====================================
* I0 15,14 0,1 0
* Q0 14,13 8,9 4
* I1 12,11 2,3 0
* Q1 11,10 10,11 4 12-bit Indices
* I2 9,8 4,5 0
* Q2 8,7 12,13 4
* I3 6,5 6,7 0
* Q3 5,4 14,15 4
*
*
* 12-bit deinterleaved unpacked I/Q
* ---------------------------------------
* | Q3 | Q2 | Q1 | Q0 | I3 | I2 | I1 | I0 | Shuffle-1
* ---------------------------------------
* | 4-bit >> offset | High bit aligned |
*
*
* 16-bit interleaved I/Q
* ---------------------------------------
* | Q3 | I3 | Q2 | I2 | Q1 | I1 | Q0 | I0 | Output (Shuffle-2)
* ---------------------------------------
* | 127 0 |
*
*/
#define SC12_SHIFT_MASK 0x0fff0fff, 0x0fff0fff, 0xfff0fff0, 0xfff0fff0
#define SC12_PACK_SHUFFLE1 5, 4, 8, 7, 11, 10, 14, 13, 6, 5, 9, 8, 12, 11, 15, 14
#define SC12_PACK_SHUFFLE2 15, 14, 7, 6, 13, 12, 5, 4, 11, 10, 3, 2, 9, 8, 1, 0
template <typename type, tohost32_type tohost>
inline void convert_sc12_item32_3_to_star_4(const item32_sc12_3x& input,
std::complex<type>* out,
double scalar,
typename std::enable_if<std::is_same<type, float>::value>::type* = NULL)
{
__m128i m0, m1, m2, m3, m4;
m0 = _mm_set_epi32(SC12_SHIFT_MASK);
m1 = _mm_set_epi8(SC12_PACK_SHUFFLE1);
m2 = _mm_loadu_si128((__m128i*)&input);
m2 = _mm_shuffle_epi32(m2, _MM_SHUFFLE(0, 1, 2, 3));
m3 = _mm_shuffle_epi8(m2, m1);
m3 = _mm_and_si128(m3, m0);
m4 = _mm_setzero_si128();
m1 = _mm_unpacklo_epi16(m4, m3);
m2 = _mm_unpackhi_epi16(m4, m3);
m2 = _mm_slli_epi32(m2, 4);
m3 = _mm_unpacklo_epi32(m1, m2);
m4 = _mm_unpackhi_epi32(m1, m2);
__m128 m5, m6, m7;
m5 = _mm_set_ps1(scalar / (1 << 16));
m6 = _mm_cvtepi32_ps(m3);
m7 = _mm_cvtepi32_ps(m4);
m6 = _mm_mul_ps(m6, m5);
m7 = _mm_mul_ps(m7, m5);
_mm_storeu_ps(reinterpret_cast<float*>(&out[0]), m6);
_mm_storeu_ps(reinterpret_cast<float*>(&out[2]), m7);
}
template <typename type, tohost32_type tohost>
inline void convert_sc12_item32_3_to_star_4(const item32_sc12_3x& input,
std::complex<type>* out,
double,
typename std::enable_if<std::is_same<type, short>::value>::type* = NULL)
{
__m128i m0, m1, m2, m3;
m0 = _mm_set_epi32(SC12_SHIFT_MASK);
m1 = _mm_set_epi8(SC12_PACK_SHUFFLE1);
m2 = _mm_set_epi8(SC12_PACK_SHUFFLE2);
m3 = _mm_loadu_si128((__m128i*)&input);
m3 = _mm_shuffle_epi32(m3, _MM_SHUFFLE(0, 1, 2, 3));
m3 = _mm_shuffle_epi8(m3, m1);
m3 = _mm_and_si128(m3, m0);
m0 = _mm_slli_epi16(m3, 4);
m1 = _mm_shuffle_epi32(m3, _MM_SHUFFLE(1, 0, 0, 0));
m0 = _mm_unpackhi_epi64(m1, m0);
m1 = _mm_shuffle_epi8(m0, m2);
_mm_storeu_si128((__m128i*)out, m1);
}
template <typename type, tohost32_type tohost>
struct convert_sc12_item32_1_to_star_2 : public converter
{
convert_sc12_item32_1_to_star_2(void) : _scalar(0.0)
{
// NOP
}
void set_scalar(const double scalar)
{
const int unpack_growth = 16;
_scalar = scalar / unpack_growth;
}
void operator()(
const input_type& inputs, const output_type& outputs, const size_t nsamps)
{
const size_t head_samps = size_t(inputs[0]) & 0x3;
size_t rewind = 0;
switch (head_samps) {
case 0:
break;
case 1:
rewind = 9;
break;
case 2:
rewind = 6;
break;
case 3:
rewind = 3;
break;
}
const item32_sc12_3x* input =
reinterpret_cast<const item32_sc12_3x*>(size_t(inputs[0]) - rewind);
std::complex<type>* output = reinterpret_cast<std::complex<type>*>(outputs[0]);
std::complex<type> dummy;
size_t i = 0, o = 0;
switch (head_samps) {
case 0:
break; // no head
case 1:
convert_sc12_item32_3_to_star_4<type, tohost>(
input[i++], dummy, dummy, dummy, output[0], _scalar);
break;
case 2:
convert_sc12_item32_3_to_star_4<type, tohost>(
input[i++], dummy, dummy, output[0], output[1], _scalar);
break;
case 3:
convert_sc12_item32_3_to_star_4<type, tohost>(
input[i++], dummy, output[0], output[1], output[2], _scalar);
break;
}
o += head_samps;
// convert the body
while (o + 3 < nsamps) {
convert_sc12_item32_3_to_star_4<type, tohost>(input[i], &output[o], _scalar);
i += 1;
o += 4;
}
const size_t tail_samps = nsamps - o;
switch (tail_samps) {
case 0:
break; // no tail
case 1:
convert_sc12_item32_3_to_star_4<type, tohost>(
input[i], output[o + 0], dummy, dummy, dummy, _scalar);
break;
case 2:
convert_sc12_item32_3_to_star_4<type, tohost>(
input[i], output[o + 0], output[o + 1], dummy, dummy, _scalar);
break;
case 3:
convert_sc12_item32_3_to_star_4<type, tohost>(input[i],
output[o + 0],
output[o + 1],
output[o + 2],
dummy,
_scalar);
break;
}
}
double _scalar;
};
static converter::sptr make_convert_sc12_item32_le_1_to_fc32_1(void)
{
return converter::sptr(new convert_sc12_item32_1_to_star_2<float, uhd::wtohx>());
}
static converter::sptr make_convert_sc12_item32_le_1_to_sc16_1(void)
{
return converter::sptr(new convert_sc12_item32_1_to_star_2<short, uhd::wtohx>());
}
UHD_STATIC_BLOCK(register_sse_unpack_sc12)
{
uhd::convert::id_type id;
id.num_inputs = 1;
id.num_outputs = 1;
id.output_format = "fc32";
id.input_format = "sc12_item32_le";
uhd::convert::register_converter(
id, &make_convert_sc12_item32_le_1_to_fc32_1, PRIORITY_SIMD);
id.output_format = "sc16";
id.input_format = "sc12_item32_le";
uhd::convert::register_converter(
id, &make_convert_sc12_item32_le_1_to_sc16_1, PRIORITY_SIMD);
}
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