// specific version of the function. Compile once for each version
float FUNCNAME (float * f) {
Vec16f a; // vector of 16 floats
a.load(f); // load array into vector
return horizontal_add(a); // return sum of 16 elements
}
static inline double
calc_output_single (SINC_FILTER *filter, const increment_t increment, const increment_t start_filter_index)
{
#ifdef RESAMPLER_SSE_OPT
__m128i increment4;
__m128 left128,right128;
float left,right;
#else
double left,right;
#endif
const coeff_t * const __restrict coeffs = filter->coeffs;
const float * const __restrict buffer = filter->buffer;
increment_t filter_index, max_filter_index ;
int data_index, coeff_count;
/* Convert input parameters into fixed point. */
max_filter_index = int_to_fp (filter->coeff_half_len) ;
/* First apply the left half of the filter. */
filter_index = start_filter_index ;
coeff_count = (max_filter_index - filter_index) / increment ;
filter_index = filter_index + coeff_count * increment ;
data_index = filter->b_current - coeff_count ;
#ifdef RESAMPLER_SSE_OPT
increment4 = _mm_set_epi32(increment * 3, increment * 2, increment, 0);
left128 = _mm_setzero_ps();
while(filter_index >= increment * 3)
{
#ifdef USE_WINDOWS_CODE
__m128i indx = _mm_sub_epi32(_mm_set1_epi32(filter_index), increment4);
__m128i fractioni = _mm_and_si128(indx,_mm_set1_epi32(((((increment_t)1) << SHIFT_BITS) - 1)));
#else
Windows__m128i indx;
indx.m128i = _mm_sub_epi32(_mm_set1_epi32(filter_index), increment4);
__m128i fractioni = _mm_and_si128(indx.m128i,_mm_set1_epi32(((((increment_t)1) << SHIFT_BITS) - 1)));
#endif
__m128 icoeff0, icoeff2; // warning that these are uninitialized is okay and its intended, as both high and low 64bit-parts are set below
__m128 icoeff,icoeffp1,icoeffd,fraction;
#ifdef _DEBUG
icoeff0 = icoeff2 = _mm_setzero_ps();
#endif
#ifdef USE_WINDOWS_CODE
indx = _mm_srai_epi32(indx, SHIFT_BITS);
#else
indx.m128i = _mm_srai_epi32(indx.m128i, SHIFT_BITS);
#endif
icoeff0 = _mm_loadh_pi(_mm_loadl_pi(icoeff0, (__m64*)(coeffs + indx.m128i_i32[0])), (__m64*)(coeffs + indx.m128i_i32[1]));
icoeff2 = _mm_loadh_pi(_mm_loadl_pi(icoeff2, (__m64*)(coeffs + indx.m128i_i32[2])), (__m64*)(coeffs + indx.m128i_i32[3]));
icoeff = _mm_shuffle_ps(icoeff0, icoeff2, _MM_SHUFFLE(2, 0, 2, 0));
icoeffp1 = _mm_shuffle_ps(icoeff0, icoeff2, _MM_SHUFFLE(3, 1, 3, 1));
icoeffd = _mm_sub_ps(icoeffp1, icoeff);
fraction = _mm_mul_ps(_mm_cvtepi32_ps(fractioni), _mm_set1_ps((float)INV_FP_ONE));
icoeff = _mm_add_ps(icoeff,_mm_mul_ps(icoeffd, fraction));
left128 = _mm_add_ps(left128,_mm_mul_ps(icoeff, _mm_loadu_ps(buffer + data_index)));
data_index += 4;
filter_index -= increment * 4;
}
#endif
left = 0.;
while (filter_index >= MAKE_INCREMENT_T(0))
{
coeff_t fraction = fp_to_float(filter_index);
int indx = fp_to_int(filter_index);
coeff_t icoeff = coeffs[indx] + fraction * (coeffs[indx + 1] - coeffs[indx]);
left += icoeff * buffer[data_index];
filter_index -= increment;
data_index++;
}
/* Now apply the right half of the filter. */
filter_index = increment - start_filter_index ;
coeff_count = (max_filter_index - filter_index) / increment ;
filter_index = filter_index + coeff_count * increment ;
data_index = filter->b_current + 1 + coeff_count ;
#ifdef RESAMPLER_SSE_OPT
right128 = _mm_setzero_ps();
while (filter_index > increment * 3)
{
#ifdef USE_WINDOWS_CODE
__m128i indx = _mm_sub_epi32(_mm_set1_epi32(filter_index), increment4);
__m128i fractioni = _mm_and_si128(indx, _mm_set1_epi32(((((increment_t)1) << SHIFT_BITS) - 1)));
#else
Windows__m128i indx;
indx.m128i = _mm_sub_epi32(_mm_set1_epi32(filter_index), increment4);
__m128i fractioni = _mm_and_si128(indx.m128i, _mm_set1_epi32(((((increment_t)1) << SHIFT_BITS) - 1)));
#endif
__m128 icoeff0, icoeff2; // warning that these are uninitialized is okay and its intended, as both high and low 64bit-parts are set below
__m128 icoeff,icoeffp1,icoeffd,fraction,data;
#ifdef _DEBUG
icoeff0 = icoeff2 = _mm_setzero_ps();
#endif
#ifdef USE_WINDOWS_CODE
indx = _mm_srai_epi32(indx, SHIFT_BITS);
#else
indx.m128i = _mm_srai_epi32(indx.m128i, SHIFT_BITS);
#endif
icoeff0 = _mm_loadh_pi(_mm_loadl_pi(icoeff0, (__m64*)(coeffs + indx.m128i_i32[0])), (__m64*)(coeffs + indx.m128i_i32[1]));
icoeff2 = _mm_loadh_pi(_mm_loadl_pi(icoeff2, (__m64*)(coeffs + indx.m128i_i32[2])), (__m64*)(coeffs + indx.m128i_i32[3]));
icoeff = _mm_shuffle_ps(icoeff0, icoeff2, _MM_SHUFFLE(2, 0, 2, 0));
icoeffp1 = _mm_shuffle_ps(icoeff0, icoeff2, _MM_SHUFFLE(3, 1, 3, 1));
icoeffd = _mm_sub_ps(icoeffp1, icoeff);
fraction = _mm_mul_ps(_mm_cvtepi32_ps(fractioni), _mm_set1_ps((float)INV_FP_ONE));
icoeff = _mm_add_ps(icoeff, _mm_mul_ps(icoeffd, fraction));
data = _mm_loadu_ps(buffer + (data_index - 3));
right128 = _mm_add_ps(right128,_mm_mul_ps(icoeff, _mm_shuffle_ps(data,data,_MM_SHUFFLE(0,1,2,3))));
data_index -= 4;
filter_index -= increment * 4;
}
#endif
right = 0.;
while (filter_index > MAKE_INCREMENT_T(0))
{
coeff_t fraction = fp_to_float(filter_index);
int indx = fp_to_int(filter_index);
coeff_t icoeff = coeffs[indx] + fraction * (coeffs[indx + 1] - coeffs[indx]);
right += icoeff * buffer[data_index];
filter_index -= increment;
data_index--;
}
return (
#ifdef RESAMPLER_SSE_OPT
_mm_cvtss_f32(horizontal_add(left128)) + _mm_cvtss_f32(horizontal_add(right128)) +
#endif
left + right) ;
} /* calc_output_single */
