diff options
Diffstat (limited to 'host/lib/convert/sse2_sc16_to_fc32.cpp')
| -rw-r--r-- | host/lib/convert/sse2_sc16_to_fc32.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/host/lib/convert/sse2_sc16_to_fc32.cpp b/host/lib/convert/sse2_sc16_to_fc32.cpp new file mode 100644 index 000000000..c03e41585 --- /dev/null +++ b/host/lib/convert/sse2_sc16_to_fc32.cpp @@ -0,0 +1,107 @@ +// +// 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(sc16_item32_le, 1, fc32, 1, PRIORITY_SIMD){ + const item32_t *input = reinterpret_cast<const item32_t *>(inputs[0]); + fc32_t *output = reinterpret_cast<fc32_t *>(outputs[0]); + + const __m128 scalar = _mm_set_ps1(float(scale_factor)/(1 << 16)); + const __m128i zeroi = _mm_setzero_si128(); + + #define convert_item32_1_to_fc32_1_nswap_guts(_al_) \ + for (; i+3 < nsamps; i+=4){ \ + /* load from input */ \ + __m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i)); \ + \ + /* unpack + swap 16-bit pairs */ \ + tmpi = _mm_shufflelo_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1)); \ + tmpi = _mm_shufflehi_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1)); \ + __m128i tmpilo = _mm_unpacklo_epi16(zeroi, tmpi); /* value in upper 16 bits */ \ + __m128i tmpihi = _mm_unpackhi_epi16(zeroi, tmpi); \ + \ + /* convert and scale */ \ + __m128 tmplo = _mm_mul_ps(_mm_cvtepi32_ps(tmpilo), scalar); \ + __m128 tmphi = _mm_mul_ps(_mm_cvtepi32_ps(tmpihi), scalar); \ + \ + /* store to output */ \ + _mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+i+0), tmplo); \ + _mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+i+2), tmphi); \ + } \ + + size_t i = 0; + + //dispatch according to alignment + switch (size_t(output) & 0xf){ + case 0x8: + item32_sc16_to_xx<uhd::htowx>(input, output, 1, scale_factor); i++; + case 0x0: + convert_item32_1_to_fc32_1_nswap_guts(_) + break; + default: convert_item32_1_to_fc32_1_nswap_guts(u_) + } + + //convert remainder + item32_sc16_to_xx<uhd::htowx>(input+i, output+i, nsamps-i, scale_factor); +} + +DECLARE_CONVERTER(sc16_item32_be, 1, fc32, 1, PRIORITY_SIMD){ + const item32_t *input = reinterpret_cast<const item32_t *>(inputs[0]); + fc32_t *output = reinterpret_cast<fc32_t *>(outputs[0]); + + const __m128 scalar = _mm_set_ps1(float(scale_factor)/(1 << 16)); + const __m128i zeroi = _mm_setzero_si128(); + + #define convert_item32_1_to_fc32_1_bswap_guts(_al_) \ + for (; i+3 < nsamps; i+=4){ \ + /* load from input */ \ + __m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i)); \ + \ + /* byteswap + unpack -> byteswap 16 bit words */ \ + tmpi = _mm_or_si128(_mm_srli_epi16(tmpi, 8), _mm_slli_epi16(tmpi, 8)); \ + __m128i tmpilo = _mm_unpacklo_epi16(zeroi, tmpi); /* value in upper 16 bits */ \ + __m128i tmpihi = _mm_unpackhi_epi16(zeroi, tmpi); \ + \ + /* convert and scale */ \ + __m128 tmplo = _mm_mul_ps(_mm_cvtepi32_ps(tmpilo), scalar); \ + __m128 tmphi = _mm_mul_ps(_mm_cvtepi32_ps(tmpihi), scalar); \ + \ + /* store to output */ \ + _mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+i+0), tmplo); \ + _mm_store ## _al_ ## ps(reinterpret_cast<float *>(output+i+2), tmphi); \ + } \ + + size_t i = 0; + + //dispatch according to alignment + switch (size_t(output) & 0xf){ + case 0x8: + item32_sc16_to_xx<uhd::htonx>(input, output, 1, scale_factor); i++; + case 0x0: + convert_item32_1_to_fc32_1_bswap_guts(_) + break; + default: convert_item32_1_to_fc32_1_bswap_guts(u_) + } + + //convert remainder + item32_sc16_to_xx<uhd::htonx>(input+i, output+i, nsamps-i, scale_factor); +} |