1 files changed, 140 insertions, 0 deletions
diff --git a/volk/kernels/volk/volk_16i_convert_8i.h b/volk/kernels/volk/volk_16i_convert_8i.h
new file mode 100644
index 000000000..3789b2e4a
--- /dev/null
+++ b/volk/kernels/volk/volk_16i_convert_8i.h
@@ -0,0 +1,140 @@
+#ifndef INCLUDED_volk_16i_convert_8i_u_H
+#define INCLUDED_volk_16i_convert_8i_u_H
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#ifdef LV_HAVE_SSE2
+#include <emmintrin.h>
+/*!
+  \brief Converts the input 16 bit integer data into 8 bit integer data
+  \param inputVector The 16 bit input data buffer
+  \param outputVector The 8 bit output data buffer
+  \param num_points The number of data values to be converted
+  \note Input and output buffers do NOT need to be properly aligned
+*/
+static inline void volk_16i_convert_8i_u_sse2(int8_t* outputVector, const int16_t* inputVector, unsigned int num_points){
+    unsigned int number = 0;
+    const unsigned int sixteenthPoints = num_points / 16;
+
+     int8_t* outputVectorPtr = outputVector;
+    int16_t* inputPtr = (int16_t*)inputVector;
+    __m128i inputVal1;
+    __m128i inputVal2;
+    __m128i ret;
+
+    for(;number < sixteenthPoints; number++){
+
+      // Load the 16 values
+      inputVal1 = _mm_loadu_si128((__m128i*)inputPtr); inputPtr += 8;
+      inputVal2 = _mm_loadu_si128((__m128i*)inputPtr); inputPtr += 8;
+
+      inputVal1 = _mm_srai_epi16(inputVal1, 8);
+      inputVal2 = _mm_srai_epi16(inputVal2, 8);
+
+      ret = _mm_packs_epi16(inputVal1, inputVal2);
+
+      _mm_storeu_si128((__m128i*)outputVectorPtr, ret);
+
+      outputVectorPtr += 16;
+    }
+
+    number = sixteenthPoints * 16;
+    for(; number < num_points; number++){
+      outputVector[number] =(int8_t)(inputVector[number] >> 8);
+    }
+}
+#endif /* LV_HAVE_SSE2 */
+
+#ifdef LV_HAVE_GENERIC
+/*!
+  \brief Converts the input 16 bit integer data into 8 bit integer data
+  \param inputVector The 16 bit input data buffer
+  \param outputVector The 8 bit output data buffer
+  \param num_points The number of data values to be converted
+  \note Input and output buffers do NOT need to be properly aligned
+*/
+static inline void volk_16i_convert_8i_generic(int8_t* outputVector, const int16_t* inputVector, unsigned int num_points){
+  int8_t* outputVectorPtr = outputVector;
+  const int16_t* inputVectorPtr = inputVector;
+  unsigned int number = 0;
+
+  for(number = 0; number < num_points; number++){
+    *outputVectorPtr++ = ((int8_t)(*inputVectorPtr++  >> 8));
+  }
+}
+#endif /* LV_HAVE_GENERIC */
+
+
+
+
+#endif /* INCLUDED_volk_16i_convert_8i_u_H */
+#ifndef INCLUDED_volk_16i_convert_8i_a_H
+#define INCLUDED_volk_16i_convert_8i_a_H
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#ifdef LV_HAVE_SSE2
+#include <emmintrin.h>
+/*!
+  \brief Converts the input 16 bit integer data into 8 bit integer data
+  \param inputVector The 16 bit input data buffer
+  \param outputVector The 8 bit output data buffer
+  \param num_points The number of data values to be converted
+*/
+static inline void volk_16i_convert_8i_a_sse2(int8_t* outputVector, const int16_t* inputVector, unsigned int num_points){
+    unsigned int number = 0;
+    const unsigned int sixteenthPoints = num_points / 16;
+
+     int8_t* outputVectorPtr = outputVector;
+    int16_t* inputPtr = (int16_t*)inputVector;
+    __m128i inputVal1;
+    __m128i inputVal2;
+    __m128i ret;
+
+    for(;number < sixteenthPoints; number++){
+
+      // Load the 16 values
+      inputVal1 = _mm_load_si128((__m128i*)inputPtr); inputPtr += 8;
+      inputVal2 = _mm_load_si128((__m128i*)inputPtr); inputPtr += 8;
+
+      inputVal1 = _mm_srai_epi16(inputVal1, 8);
+      inputVal2 = _mm_srai_epi16(inputVal2, 8);
+
+      ret = _mm_packs_epi16(inputVal1, inputVal2);
+
+      _mm_store_si128((__m128i*)outputVectorPtr, ret);
+
+      outputVectorPtr += 16;
+    }
+
+    number = sixteenthPoints * 16;
+    for(; number < num_points; number++){
+      outputVector[number] =(int8_t)(inputVector[number] >> 8);
+    }
+}
+#endif /* LV_HAVE_SSE2 */
+
+#ifdef LV_HAVE_GENERIC
+/*!
+  \brief Converts the input 16 bit integer data into 8 bit integer data
+  \param inputVector The 16 bit input data buffer
+  \param outputVector The 8 bit output data buffer
+  \param num_points The number of data values to be converted
+*/
+static inline void volk_16i_convert_8i_a_generic(int8_t* outputVector, const int16_t* inputVector, unsigned int num_points){
+  int8_t* outputVectorPtr = outputVector;
+  const int16_t* inputVectorPtr = inputVector;
+  unsigned int number = 0;
+
+  for(number = 0; number < num_points; number++){
+    *outputVectorPtr++ = ((int8_t)(*inputVectorPtr++ >> 8));
+  }
+}
+#endif /* LV_HAVE_GENERIC */
+
+
+
+
+#endif /* INCLUDED_volk_16i_convert_8i_a_H */