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//
// Copyright 2011-2012 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "convert_common.hpp"
#include <uhd/utils/byteswap.hpp>
#include <emmintrin.h>
using namespace uhd::convert;
DECLARE_CONVERTER(fc32, 1, sc16_item32_le, 1, PRIORITY_SIMD){
const fc32_t *input = reinterpret_cast<const fc32_t *>(inputs[0]);
item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
const __m128 scalar = _mm_set_ps1(float(scale_factor));
// this macro converts values faster by using SSE intrinsics to convert 4 values at a time
#define convert_fc32_1_to_item32_1_nswap_guts(_al_) \
for (; i+3 < nsamps; i+=4){ \
/* load from input */ \
__m128 tmplo = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+0)); \
__m128 tmphi = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+2)); \
\
/* convert and scale */ \
__m128i tmpilo = _mm_cvtps_epi32(_mm_mul_ps(tmplo, scalar)); \
__m128i tmpihi = _mm_cvtps_epi32(_mm_mul_ps(tmphi, scalar)); \
\
/* pack + swap 16-bit pairs */ \
__m128i tmpi = _mm_packs_epi32(tmpilo, tmpihi); \
tmpi = _mm_shufflelo_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1)); \
tmpi = _mm_shufflehi_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1)); \
\
/* store to output */ \
_mm_storeu_si128(reinterpret_cast<__m128i *>(output+i), tmpi); \
} \
size_t i = 0;
// need to dispatch according to alignment for fastest conversion
switch (size_t(input) & 0xf){
case 0x0:
// the data is 16-byte aligned, so do the fast processing of the bulk of the samples
convert_fc32_1_to_item32_1_nswap_guts(_)
break;
case 0x8:
// the first sample is 8-byte aligned - process it to align the remainder of the samples to 16-bytes
xx_to_item32_sc16<uhd::htowx>(input, output, 1, scale_factor);
i++;
// do faster processing of the bulk of the samples now that we are 16-byte aligned
convert_fc32_1_to_item32_1_nswap_guts(_)
break;
default:
// we are not 8 or 16-byte aligned, so do fast processing with the unaligned load
convert_fc32_1_to_item32_1_nswap_guts(u_)
}
// convert any remaining samples
xx_to_item32_sc16<uhd::htowx>(input+i, output+i, nsamps-i, scale_factor);
}
DECLARE_CONVERTER(fc32, 1, sc16_item32_be, 1, PRIORITY_SIMD){
const fc32_t *input = reinterpret_cast<const fc32_t *>(inputs[0]);
item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
const __m128 scalar = _mm_set_ps1(float(scale_factor));
// this macro converts values faster by using SSE intrinsics to convert 4 values at a time
#define convert_fc32_1_to_item32_1_bswap_guts(_al_) \
for (; i+3 < nsamps; i+=4){ \
/* load from input */ \
__m128 tmplo = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+0)); \
__m128 tmphi = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+2)); \
\
/* convert and scale */ \
__m128i tmpilo = _mm_cvtps_epi32(_mm_mul_ps(tmplo, scalar)); \
__m128i tmpihi = _mm_cvtps_epi32(_mm_mul_ps(tmphi, scalar)); \
\
/* pack + byteswap -> byteswap 16 bit words */ \
__m128i tmpi = _mm_packs_epi32(tmpilo, tmpihi); \
tmpi = _mm_or_si128(_mm_srli_epi16(tmpi, 8), _mm_slli_epi16(tmpi, 8)); \
\
/* store to output */ \
_mm_storeu_si128(reinterpret_cast<__m128i *>(output+i), tmpi); \
} \
size_t i = 0;
// need to dispatch according to alignment for fastest conversion
switch (size_t(input) & 0xf){
case 0x0:
// the data is 16-byte aligned, so do the fast processing of the bulk of the samples
convert_fc32_1_to_item32_1_bswap_guts(_)
case 0x8:
// the first value is 8-byte aligned - process it and prepare the bulk of the data for fast conversion
xx_to_item32_sc16<uhd::htonx>(input, output, 1, scale_factor);
i++;
// do faster processing of the remaining samples now that we are 16-byte aligned
convert_fc32_1_to_item32_1_bswap_guts(_)
break;
break;
default:
// we are not 8 or 16-byte aligned, so do fast processing with the unaligned load
convert_fc32_1_to_item32_1_bswap_guts(u_)
}
// convert any remaining samples
xx_to_item32_sc16<uhd::htonx>(input+i, output+i, nsamps-i, scale_factor);
}
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