From 4c244c78a75646ad4040fb328fa64bb752852512 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Fri, 27 Apr 2012 17:23:18 -0700
Subject: convert: squashed converter and sse2 work

---
 host/lib/convert/sse2_fc32_to_sc16.cpp | 103 +++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 host/lib/convert/sse2_fc32_to_sc16.cpp

(limited to 'host/lib/convert/sse2_fc32_to_sc16.cpp')

diff --git a/host/lib/convert/sse2_fc32_to_sc16.cpp b/host/lib/convert/sse2_fc32_to_sc16.cpp
new file mode 100644
index 000000000..90bf0ed04
--- /dev/null
+++ b/host/lib/convert/sse2_fc32_to_sc16.cpp
@@ -0,0 +1,103 @@
+//
+// 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));
+
+    #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;
+
+    //dispatch according to alignment
+    switch (size_t(input) & 0xf){
+    case 0x8:
+        xx_to_item32_sc16<uhd::htowx>(input, output, 1, scale_factor); i++;
+    case 0x0:
+        convert_fc32_1_to_item32_1_nswap_guts(_)
+        break;
+    default: convert_fc32_1_to_item32_1_nswap_guts(u_)
+    }
+
+    //convert remainder
+    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));
+
+    #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;
+
+    //dispatch according to alignment
+    switch (size_t(input) & 0xf){
+    case 0x8:
+        xx_to_item32_sc16<uhd::htonx>(input, output, 1, scale_factor); i++;
+    case 0x0:
+        convert_fc32_1_to_item32_1_bswap_guts(_)
+        break;
+    default: convert_fc32_1_to_item32_1_bswap_guts(u_)
+    }
+
+    //convert remainder
+    xx_to_item32_sc16<uhd::htonx>(input+i, output+i, nsamps-i, scale_factor);
+}
-- 
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