uhd: added sse2 conversions for fc32 to sc8

2 files changed, 151 insertions, 0 deletions

diff --git a/host/lib/convert/CMakeLists.txt b/host/lib/convert/CMakeLists.txt
index a2a61cb9a..c42a0a434 100644
--- a/host/lib/convert/CMakeLists.txt
+++ b/host/lib/convert/CMakeLists.txt
@@ -73,6 +73,7 @@ IF(HAVE_EMMINTRIN_H)
     SET(convert_with_sse2_sources
         ${CMAKE_CURRENT_SOURCE_DIR}/convert_fc32_with_sse2.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/convert_fc64_with_sse2.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/convert_fc32_to_sc8_with_sse2.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/convert_fc64_to_sc8_with_sse2.cpp
     )
     SET_SOURCE_FILES_PROPERTIES(
diff --git a/host/lib/convert/convert_fc32_to_sc8_with_sse2.cpp b/host/lib/convert/convert_fc32_to_sc8_with_sse2.cpp
new file mode 100644
index 000000000..b8545bad0
--- /dev/null
+++ b/host/lib/convert/convert_fc32_to_sc8_with_sse2.cpp
@@ -0,0 +1,150 @@
+//
+// 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_sc32_4x_be(
+    const __m128 &in0, const __m128 &in1,
+    const __m128 &in2, const __m128 &in3,
+    const __m128 &scalar
+){
+    __m128i tmpi0 = _mm_cvtps_epi32(_mm_mul_ps(in0, scalar));
+    tmpi0 = _mm_shuffle_epi32(tmpi0, _MM_SHUFFLE(1, 0, 3, 2));
+    __m128i tmpi1 = _mm_cvtps_epi32(_mm_mul_ps(in1, scalar));
+    tmpi1 = _mm_shuffle_epi32(tmpi1, _MM_SHUFFLE(1, 0, 3, 2));
+    const __m128i lo = _mm_packs_epi32(tmpi0, tmpi1);
+
+    __m128i tmpi2 = _mm_cvtps_epi32(_mm_mul_ps(in2, scalar));
+    tmpi2 = _mm_shuffle_epi32(tmpi2, _MM_SHUFFLE(1, 0, 3, 2));
+    __m128i tmpi3 = _mm_cvtps_epi32(_mm_mul_ps(in3, scalar));
+    tmpi3 = _mm_shuffle_epi32(tmpi3, _MM_SHUFFLE(1, 0, 3, 2));
+    const __m128i hi = _mm_packs_epi32(tmpi2, tmpi3);
+
+    return _mm_packs_epi16(lo, hi);
+}
+
+UHD_INLINE __m128i pack_sc32_4x_le(
+    const __m128 &in0, const __m128 &in1,
+    const __m128 &in2, const __m128 &in3,
+    const __m128 &scalar
+){
+    __m128i tmpi0 = _mm_cvtps_epi32(_mm_mul_ps(in0, scalar));
+    tmpi0 = _mm_shuffle_epi32(tmpi0, _MM_SHUFFLE(2, 3, 0, 1));
+    __m128i tmpi1 = _mm_cvtps_epi32(_mm_mul_ps(in1, scalar));
+    tmpi1 = _mm_shuffle_epi32(tmpi1, _MM_SHUFFLE(2, 3, 0, 1));
+    const __m128i lo = _mm_packs_epi32(tmpi0, tmpi1);
+
+    __m128i tmpi2 = _mm_cvtps_epi32(_mm_mul_ps(in2, scalar));
+    tmpi2 = _mm_shuffle_epi32(tmpi2, _MM_SHUFFLE(2, 3, 0, 1));
+    __m128i tmpi3 = _mm_cvtps_epi32(_mm_mul_ps(in3, scalar));
+    tmpi3 = _mm_shuffle_epi32(tmpi3, _MM_SHUFFLE(2, 3, 0, 1));
+    const __m128i hi = _mm_packs_epi32(tmpi2, tmpi3);
+
+    return _mm_packs_epi16(lo, hi);
+}
+
+DECLARE_CONVERTER(fc32, 1, sc8_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));
+
+    #define convert_fc32_1_to_sc8_item32_1_bswap_guts(_al_)             \
+    for (size_t j = 0; i+7 < nsamps; i+=8, j+=2){                       \
+        /* load from input */                                           \
+        __m128 tmp0 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+0)); \
+        __m128 tmp1 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+2)); \
+        __m128 tmp2 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+4)); \
+        __m128 tmp3 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+6)); \
+                                                                        \
+        /* convert */                                                   \
+        const __m128i tmpi = pack_sc32_4x_be(tmp0, tmp1, tmp2, tmp3, 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_fc32_1_to_sc8_item32_1_bswap_guts(_)
+    }
+    else{
+        convert_fc32_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 = fc32_to_item32_sc8(input[i], input[i+1], scale_factor);
+        output[j] = uhd::byteswap(item);
+    }
+
+    if (nsamps != num_pairs*2){
+        const item32_t item = fc32_to_item32_sc8(input[nsamps-1], 0, scale_factor);
+        output[num_pairs] = uhd::byteswap(item);
+    }
+}
+
+DECLARE_CONVERTER(fc32, 1, sc8_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));
+
+    #define convert_fc32_1_to_sc8_item32_1_nswap_guts(_al_)             \
+    for (size_t j = 0; i+7 < nsamps; i+=8, j+=2){                       \
+        /* load from input */                                           \
+        __m128 tmp0 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+0)); \
+        __m128 tmp1 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+2)); \
+        __m128 tmp2 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+4)); \
+        __m128 tmp3 = _mm_load ## _al_ ## ps(reinterpret_cast<const float *>(input+i+6)); \
+                                                                        \
+        /* convert */                                                   \
+        const __m128i tmpi = pack_sc32_4x_le(tmp0, tmp1, tmp2, tmp3, 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_fc32_1_to_sc8_item32_1_nswap_guts(_)
+    }
+    else{
+        convert_fc32_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 = fc32_to_item32_sc8(input[i], input[i+1], scale_factor);
+        output[j] = (item);
+    }
+
+    if (nsamps != num_pairs*2){
+        const item32_t item = fc32_to_item32_sc8(input[nsamps-1], 0, scale_factor);
+        output[num_pairs] = (item);
+    }
+}