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//
// Copyright 2012-2013 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include "convert_common.hpp"
#include <uhd/utils/byteswap.hpp>
#include <emmintrin.h>
using namespace uhd::convert;
static const __m128i zeroi = _mm_setzero_si128();
template <const int shuf>
UHD_INLINE void unpack_sc32_4x(
const __m128i &in,
__m128 &out0, __m128 &out1,
__m128 &out2, __m128 &out3,
const __m128 &scalar
){
const __m128i tmplo = _mm_unpacklo_epi8(zeroi, in); /* value in upper 8 bits */
__m128i tmp0 = _mm_shuffle_epi32(_mm_unpacklo_epi16(zeroi, tmplo), shuf); /* value in upper 16 bits */
__m128i tmp1 = _mm_shuffle_epi32(_mm_unpackhi_epi16(zeroi, tmplo), shuf);
out0 = _mm_mul_ps(_mm_cvtepi32_ps(tmp0), scalar);
out1 = _mm_mul_ps(_mm_cvtepi32_ps(tmp1), scalar);
const __m128i tmphi = _mm_unpackhi_epi8(zeroi, in);
__m128i tmp2 = _mm_shuffle_epi32(_mm_unpacklo_epi16(zeroi, tmphi), shuf);
__m128i tmp3 = _mm_shuffle_epi32(_mm_unpackhi_epi16(zeroi, tmphi), shuf);
out2 = _mm_mul_ps(_mm_cvtepi32_ps(tmp2), scalar);
out3 = _mm_mul_ps(_mm_cvtepi32_ps(tmp3), scalar);
}
DECLARE_CONVERTER(sc8_item32_be, 1, fc32, 1, PRIORITY_SIMD){
const item32_t *input = reinterpret_cast<const item32_t *>(size_t(inputs[0]) & ~0x3);
fc32_t *output = reinterpret_cast<fc32_t *>(outputs[0]);
const __m128 scalar = _mm_set_ps1(float(scale_factor)/(1 << 24));
const int shuf = _MM_SHUFFLE(3, 2, 1, 0);
size_t i = 0, j = 0;
fc32_t dummy;
size_t num_samps = nsamps;
if ((size_t(inputs[0]) & 0x3) != 0){
item32_sc8_to_xx<uhd::ntohx>(input++, output++, 1, scale_factor);
num_samps--;
}
#define convert_sc8_item32_1_to_fc32_1_bswap_guts(_al_) \
for (; j+7 < num_samps; j+=8, i+=4){ \
/* load from input */ \
__m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i)); \
\
/* unpack + swap 8-bit pairs */ \
__m128 tmp0, tmp1, tmp2, tmp3; \
unpack_sc32_4x<shuf>(tmpi, tmp0, tmp1, tmp2, tmp3, scalar); \
\
/* store to output */ \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+0), tmp0); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+2), tmp1); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+4), tmp2); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+6), tmp3); \
}
//dispatch according to alignment
if ((size_t(output) & 0xf) == 0){
convert_sc8_item32_1_to_fc32_1_bswap_guts(_)
}
else{
convert_sc8_item32_1_to_fc32_1_bswap_guts(u_)
}
//convert remainder
item32_sc8_to_xx<uhd::ntohx>(input+i, output+j, num_samps-j, scale_factor);
}
DECLARE_CONVERTER(sc8_item32_le, 1, fc32, 1, PRIORITY_SIMD){
const item32_t *input = reinterpret_cast<const item32_t *>(size_t(inputs[0]) & ~0x3);
fc32_t *output = reinterpret_cast<fc32_t *>(outputs[0]);
const __m128 scalar = _mm_set_ps1(float(scale_factor)/(1 << 24));
const int shuf = _MM_SHUFFLE(0, 1, 2, 3);
size_t i = 0, j = 0;
fc32_t dummy;
size_t num_samps = nsamps;
if ((size_t(inputs[0]) & 0x3) != 0){
item32_sc8_to_xx<uhd::wtohx>(input++, output++, 1, scale_factor);
num_samps--;
}
#define convert_sc8_item32_1_to_fc32_1_nswap_guts(_al_) \
for (; j+7 < num_samps; j+=8, i+=4){ \
/* load from input */ \
__m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i)); \
\
/* unpack + swap 8-bit pairs */ \
__m128 tmp0, tmp1, tmp2, tmp3; \
unpack_sc32_4x<shuf>(tmpi, tmp0, tmp1, tmp2, tmp3, scalar); \
\
/* store to output */ \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+0), tmp0); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+2), tmp1); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+4), tmp2); \
_mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+j+6), tmp3); \
}
//dispatch according to alignment
if ((size_t(output) & 0xf) == 0){
convert_sc8_item32_1_to_fc32_1_nswap_guts(_)
}
else{
convert_sc8_item32_1_to_fc32_1_nswap_guts(u_)
}
//convert remainder
item32_sc8_to_xx<uhd::wtohx>(input+i, output+j, num_samps-j, scale_factor);
}
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