mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2024-12-13 19:50:34 +00:00
Code Issues Releases Wiki Activity

Documenting kernels constraint

Browse Source
This commit is contained in:
Carles Fernandez 2016-05-06 08:25:04 +02:00
parent fd81154b95
commit 84911043b4
2 changed files with 2 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_resampler_fast_16ic.h
View File

@ -39,6 +39,7 @@
* \b Overview
*
* Resamples a complex vector (16-bit integer each component).
* WARNING: \p phase cannot reach more that twice the length of \p local_code, either positive or negative.
*
* <b>Dispatcher Prototype</b>
* \code
@ -64,14 +65,9 @@
#include <volk_gnsssdr/volk_gnsssdr_common.h>
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
//#pragma STDC FENV_ACCESS ON
#ifdef LV_HAVE_GENERIC
//int round_int( float r ) {
// return (r > 0.0) ? (r + 0.5) : (r - 0.5);
//}
static inline void volk_gnsssdr_16ic_resampler_fast_16ic_generic(lv_16sc_t* result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, int code_length_chips, unsigned int num_output_samples)
{
int local_code_chip_index;
@ -132,7 +128,6 @@ static inline void volk_gnsssdr_16ic_resampler_fast_16ic_a_sse2(lv_16sc_t* resul
__VOLK_ATTR_ALIGNED(16) float init_4constant_float[4] = { 4.0f, 4.0f, 4.0f, 4.0f };
__m128 _4constant_float = _mm_load_ps(init_4constant_float);
for(number = 0; number < quarterPoints; number++)
{
_code_phase_out = _mm_mul_ps(_code_phase_step_chips, _4output_index); //compute the code phase point with the phase step
@ -156,7 +151,6 @@ static inline void volk_gnsssdr_16ic_resampler_fast_16ic_a_sse2(lv_16sc_t* resul
*_result++ = local_code[local_code_chip_index[3]];
_4output_index = _mm_add_ps(_4output_index, _4constant_float);
}
for(number = quarterPoints * 4; number < num_output_samples; number++)
@ -166,7 +160,6 @@ static inline void volk_gnsssdr_16ic_resampler_fast_16ic_a_sse2(lv_16sc_t* resul
if (local_code_chip_index[0] > (code_length_chips - 1)) local_code_chip_index[0] -= code_length_chips;
*_result++ = local_code[local_code_chip_index[0]];
}
}
#endif /* LV_HAVE_SSE2 */
@ -238,7 +231,6 @@ static inline void volk_gnsssdr_16ic_resampler_fast_16ic_u_sse2(lv_16sc_t* resul
*_result++ = local_code[local_code_chip_index[3]];
_4output_index = _mm_add_ps(_4output_index, _4constant_float);
}
for(number = quarterPoints * 4; number < num_output_samples; number++)
@ -248,7 +240,6 @@ static inline void volk_gnsssdr_16ic_resampler_fast_16ic_u_sse2(lv_16sc_t* resul
if (local_code_chip_index[0] > (code_length_chips - 1)) local_code_chip_index[0] -= code_length_chips;
*_result++ = local_code[local_code_chip_index[0]];
}
}
#endif /* LV_HAVE_SSE2 */

6
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_xn_resampler_fast_16ic_xn.h
View File

@ -40,6 +40,7 @@
* \b Overview
*
* Resamples a complex vector (16-bit integer each component), providing \p num_out_vectors outputs.
* WARNING: \p phase cannot reach more that twice the length of \p local_code, either positive or negative.
*
* <b>Dispatcher Prototype</b>
* \code
@ -81,7 +82,6 @@ static inline void volk_gnsssdr_16ic_xn_resampler_fast_16ic_xn_generic(lv_16sc_t
local_code_chip_index = round(code_phase_step_chips * (float)(n) + rem_code_phase_chips[current_vector] - 0.5f);
if (local_code_chip_index < 0.0) local_code_chip_index += code_length_chips;
if (local_code_chip_index > (code_length_chips - 1)) local_code_chip_index -= code_length_chips;
//std::cout<<"g["<<n<<"]="<<code_phase_step_chips*static_cast<float>(n) + rem_code_phase_chips-0.5f<<","<<local_code_chip_index<<" ";
result[current_vector][n] = local_code[local_code_chip_index];
}
}
@ -176,9 +176,7 @@ static inline void volk_gnsssdr_16ic_xn_resampler_fast_16ic_xn_a_sse2(lv_16sc_t*
if (local_code_chip_index[0] > (code_length_chips - 1)) local_code_chip_index[0] -= code_length_chips;
_result[current_vector][number] = local_code[local_code_chip_index[0]];
}
}
}
#endif /* LV_HAVE_SSE2 */
@ -269,9 +267,7 @@ static inline void volk_gnsssdr_16ic_xn_resampler_fast_16ic_xn_u_sse2(lv_16sc_t*
if (local_code_chip_index[0] > (code_length_chips - 1)) local_code_chip_index[0] -= code_length_chips;
_result[current_vector][number] = local_code[local_code_chip_index[0]];
}
}
}
#endif /* LV_HAVE_SSE2 */