uhd: added sse2 conversions for fc64 to sc8

1 files changed, 156 insertions, 0 deletions

diff --git a/host/lib/convert/convert_fc64_to_sc8_with_sse2.cpp b/host/lib/convert/convert_fc64_to_sc8_with_sse2.cpp
new file mode 100644
index 000000000..405850601
--- /dev/null
+++ b/host/lib/convert/convert_fc64_to_sc8_with_sse2.cpp
@@ -0,0 +1,156 @@
+//
+// Copyright 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;
+
+UHD_INLINE __m128i pack_sc8_item32_4x(
+    const __m128i &in0, const __m128i &in1,
+    const __m128i &in2, const __m128i &in3
+){
+    const __m128i lo = _mm_packs_epi32(in0, in1);
+    const __m128i hi = _mm_packs_epi32(in2, in3);
+    return _mm_packs_epi16(lo, hi);
+}
+
+UHD_INLINE __m128i pack_sc32_4x_be(
+    const __m128d &lo, const __m128d &hi,
+    const __m128d &scalar
+){
+    const __m128i tmpi_lo = _mm_cvttpd_epi32(_mm_mul_pd(hi, scalar));
+    const __m128i tmpi_hi = _mm_cvttpd_epi32(_mm_mul_pd(lo, scalar));
+    return _mm_unpacklo_epi64(tmpi_lo, tmpi_hi);
+}
+
+UHD_INLINE __m128i pack_sc32_4x_le(
+    const __m128d &lo, const __m128d &hi,
+    const __m128d &scalar
+){
+    const __m128i tmpi_lo = _mm_cvttpd_epi32(_mm_mul_pd(lo, scalar));
+    const __m128i tmpi_hi = _mm_cvttpd_epi32(_mm_mul_pd(hi, scalar));
+    const __m128i tmpi = _mm_unpacklo_epi64(tmpi_lo, tmpi_hi);
+    return _mm_shuffle_epi32(tmpi, _MM_SHUFFLE(2, 3, 0, 1));
+}
+
+DECLARE_CONVERTER(fc64, 1, sc8_item32_be, 1, PRIORITY_SIMD){
+    const fc64_t *input = reinterpret_cast<const fc64_t *>(inputs[0]);
+    item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
+
+    const __m128d scalar = _mm_set1_pd(scale_factor);
+
+    #define convert_fc64_1_to_sc8_item32_1_bswap_guts(_al_)             \
+    for (size_t j = 0; i+7 < nsamps; i+=8, j+=4){                       \
+        /* load from input */                                           \
+        __m128d tmp0 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+0)); \
+        __m128d tmp1 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+1)); \
+        __m128d tmp2 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+2)); \
+        __m128d tmp3 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+3)); \
+        __m128d tmp4 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+4)); \
+        __m128d tmp5 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+5)); \
+        __m128d tmp6 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+6)); \
+        __m128d tmp7 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+7)); \
+                                                                        \
+        /* interleave */                                                \
+        const __m128i tmpi = pack_sc8_item32_4x(                        \
+            pack_sc32_4x_be(tmp0, tmp1, scalar),                        \
+            pack_sc32_4x_be(tmp2, tmp3, scalar),                        \
+            pack_sc32_4x_be(tmp4, tmp5, scalar),                        \
+            pack_sc32_4x_be(tmp6, tmp7, scalar)                         \
+        );                                                              \
+                                                                        \
+        /* store to output */                                           \
+        _mm_storeu_si128(reinterpret_cast<__m128i *>(output+j), tmpi);  \
+    }                                                                   \
+
+    size_t i = 0;
+
+    //dispatch according to alignment
+    if ((size_t(input) & 0xf) == 0){
+        convert_fc64_1_to_sc8_item32_1_bswap_guts(_)
+    }
+    else{
+        convert_fc64_1_to_sc8_item32_1_bswap_guts(u_)
+    }
+
+    //convert remainder
+    const size_t num_pairs = nsamps/2;
+    for (size_t j = i/2; j < num_pairs; j++, i+=2){
+        const item32_t item = fc64_to_item32_sc8(input[i], input[i+1], scale_factor);
+        output[j] = uhd::byteswap(item);
+    }
+
+    if (nsamps != num_pairs*2){
+        const item32_t item = fc64_to_item32_sc8(input[nsamps-1], 0, scale_factor);
+        output[num_pairs] = uhd::byteswap(item);
+    }
+}
+
+DECLARE_CONVERTER(fc64, 1, sc8_item32_le, 1, PRIORITY_SIMD){
+    const fc64_t *input = reinterpret_cast<const fc64_t *>(inputs[0]);
+    item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
+
+    const __m128d scalar = _mm_set1_pd(scale_factor);
+
+    #define convert_fc64_1_to_sc8_item32_1_nswap_guts(_al_)             \
+    for (size_t j = 0; i+7 < nsamps; i+=8, j+=4){                       \
+        /* load from input */                                           \
+        __m128d tmp0 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+0)); \
+        __m128d tmp1 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+1)); \
+        __m128d tmp2 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+2)); \
+        __m128d tmp3 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+3)); \
+        __m128d tmp4 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+4)); \
+        __m128d tmp5 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+5)); \
+        __m128d tmp6 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+6)); \
+        __m128d tmp7 = _mm_load ## _al_ ## pd(reinterpret_cast<const double *>(input+i+7)); \
+                                                                        \
+        /* interleave */                                                \
+        const __m128i tmpi = pack_sc8_item32_4x(                        \
+            pack_sc32_4x_le(tmp0, tmp1, scalar),                        \
+            pack_sc32_4x_le(tmp2, tmp3, scalar),                        \
+            pack_sc32_4x_le(tmp4, tmp5, scalar),                        \
+            pack_sc32_4x_le(tmp6, tmp7, scalar)                         \
+        );                                                              \
+                                                                        \
+        /* store to output */                                           \
+        _mm_storeu_si128(reinterpret_cast<__m128i *>(output+j), tmpi);  \
+    }                                                                   \
+
+    size_t i = 0;
+
+    //dispatch according to alignment
+    if ((size_t(input) & 0xf) == 0){
+        convert_fc64_1_to_sc8_item32_1_nswap_guts(_)
+    }
+    else{
+        convert_fc64_1_to_sc8_item32_1_nswap_guts(u_)
+    }
+
+    //convert remainder
+    const size_t num_pairs = nsamps/2;
+    for (size_t j = i/2; j < num_pairs; j++, i+=2){
+        const item32_t item = fc64_to_item32_sc8(input[i], input[i+1], scale_factor);
+        output[j] = (item);
+    }
+
+    if (nsamps != num_pairs*2){
+        const item32_t item = fc64_to_item32_sc8(input[nsamps-1], 0, scale_factor);
+        output[num_pairs] = (item);
+    }
+}