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#ifndef INCLUDED_VOLK_16s_CONVERT_8s_UNALIGNED16_H
#define INCLUDED_VOLK_16s_CONVERT_8s_UNALIGNED16_H
#include <inttypes.h>
#include <stdio.h>
#if 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_16s_convert_8s_unaligned16_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_16s_convert_8s_unaligned16_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_16s_CONVERT_8s_UNALIGNED16_H */
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