[hamradio-commits] [gnss-sdr] 172/236: fixing resampler
Carles Fernandez
carles_fernandez-guest at moszumanska.debian.org
Tue Apr 26 16:02:49 UTC 2016
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carles_fernandez-guest pushed a commit to branch next
in repository gnss-sdr.
commit 9cb60ec94859f35f4c95a4690a9ad6878f03cdda
Author: Carles Fernandez <carles.fernandez at gmail.com>
Date: Thu Apr 7 12:42:24 2016 +0200
fixing resampler
---
.../volk_gnsssdr_16ic_xn_resampler2_16ic_xn.h | 102 ++++++++++-----------
1 file changed, 47 insertions(+), 55 deletions(-)
diff --git a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_xn_resampler2_16ic_xn.h b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_xn_resampler2_16ic_xn.h
index 51216eb..cdd5897 100644
--- a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_xn_resampler2_16ic_xn.h
+++ b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_xn_resampler2_16ic_xn.h
@@ -43,7 +43,7 @@
*
* <b>Dispatcher Prototype</b>
* \code
- * void volk_gnsssdr_16ic_xn_resampler2_16ic_xn(lv_16sc_t** result, const lv_16sc_t* local_code, float* rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+ * void volk_gnsssdr_16ic_xn_resampler2_16ic_xn(lv_16sc_t** result, const lv_16sc_t* local_code, float* rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
* \endcode
*
* \b Inputs
@@ -52,8 +52,8 @@
* \li code_phase_step_chips: Phase increment per sample [chips/sample].
* \li shifts_chips: Vector of floats that defines the spacing (in chips) between the replicas of \p local_code
* \li code_length_chips: Code length in chips.
- * \li num_out_vectors Number of output vectors.
- * \li num_output_samples: The number of data values to be in the resampled vector.
+ * \li num_out_vectors: Number of output vectors.
+ * \li num_points: The number of data values to be in the resampled vector.
*
* \b Outputs
* \li result: Pointer to a vector of pointers where the results will be stored.
@@ -70,18 +70,18 @@
#ifdef LV_HAVE_GENERIC
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_generic(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_generic(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
int local_code_chip_index;
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
- for (int n = 0; n < num_output_samples; n++)
+ for (int n = 0; n < num_points; n++)
{
// resample code for current tap
local_code_chip_index = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index = local_code_chip_index % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index < 0) local_code_chip_index += code_length_chips;
+ local_code_chip_index = local_code_chip_index % code_length_chips;
result[current_correlator_tap][n] = local_code[local_code_chip_index];
}
}
@@ -92,10 +92,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_generic(lv_16sc_t** r
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse4_1(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse4_1(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int quarterPoints = num_output_samples / 4;
+ const unsigned int quarterPoints = num_points / 4;
const __m128 fours = _mm_set1_ps(4.0f);
const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
@@ -139,13 +139,13 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse4_1(lv_16sc_t**
}
indexn = _mm_add_ps(indexn, fours);
}
- for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
+ for(unsigned int n = quarterPoints * 4; n < num_points; n++)
{
// resample code for current tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -156,10 +156,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse4_1(lv_16sc_t**
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse4_1(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse4_1(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int quarterPoints = num_output_samples / 4;
+ const unsigned int quarterPoints = num_points / 4;
const __m128 fours = _mm_set1_ps(4.0f);
const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
@@ -203,13 +203,13 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse4_1(lv_16sc_t**
}
indexn = _mm_add_ps(indexn, fours);
}
- for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
+ for(unsigned int n = quarterPoints * 4; n < num_points; n++)
{
// resample code for current tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -220,10 +220,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse4_1(lv_16sc_t**
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse3(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse3(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int quarterPoints = num_output_samples / 4;
+ const unsigned int quarterPoints = num_points / 4;
const __m128 ones = _mm_set1_ps(1.0f);
const __m128 fours = _mm_set1_ps(4.0f);
@@ -246,7 +246,6 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse3(lv_16sc_t** re
__m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
for(unsigned int n = 0; n < quarterPoints; n++)
{
- //__builtin_prefetch(&_result[current_correlator_tap][4 * n] + 8, 1, 0);
aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
aux = _mm_add_ps(aux, aux2);
// floor
@@ -272,14 +271,13 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse3(lv_16sc_t** re
}
indexn = _mm_add_ps(indexn, fours);
}
- for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
+ for(unsigned int n = quarterPoints * 4; n < num_points; n++)
{
- //__builtin_prefetch(&_result[current_correlator_tap][n] + 2, 1, 0);
// resample code for current tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -290,10 +288,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_sse3(lv_16sc_t** re
#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse3(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse3(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int quarterPoints = num_output_samples / 4;
+ const unsigned int quarterPoints = num_points / 4;
const __m128 ones = _mm_set1_ps(1.0f);
const __m128 fours = _mm_set1_ps(4.0f);
@@ -316,8 +314,6 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse3(lv_16sc_t** re
__m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
for(unsigned int n = 0; n < quarterPoints; n++)
{
- //__builtin_prefetch(&_result[current_correlator_tap][4 * n + 3], 1, 0);
- //__builtin_prefetch(&local_code_chip_index[4]);
aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
aux = _mm_add_ps(aux, aux2);
// floor
@@ -343,14 +339,13 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse3(lv_16sc_t** re
}
indexn = _mm_add_ps(indexn, fours);
}
- for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
+ for(unsigned int n = quarterPoints * 4; n < num_points; n++)
{
- //__builtin_prefetch(&_result[current_correlator_tap][n], 1, 0);
// resample code for current tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -361,10 +356,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_sse3(lv_16sc_t** re
#ifdef LV_HAVE_AVX
#include <immintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_avx(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_avx(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int avx_iters = num_output_samples / 8;
+ const unsigned int avx_iters = num_points / 8;
const __m256 eights = _mm256_set1_ps(8.0f);
const __m256 rem_code_phase_chips_reg = _mm256_set1_ps(rem_code_phase_chips);
@@ -375,34 +370,33 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_avx(lv_16sc_t** res
const __m256 zeros = _mm256_setzero_ps();
const __m256 code_length_chips_reg_f = _mm256_set1_ps((float)code_length_chips);
+ const __m256 n0 = _mm256_set_ps(7.0f, 6.0f, 5.0f, 4.0f, 3.0f, 2.0f, 1.0f, 0.0f);
__m256i local_code_chip_index_reg, i;
- __m256 aux, aux2, shifts_chips_reg, c, cTrunc, base, negatives;
+ __m256 aux, aux2, aux3, shifts_chips_reg, c, cTrunc, base, negatives, indexn;
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
shifts_chips_reg = _mm256_set1_ps((float)shifts_chips[current_correlator_tap]);
aux2 = _mm256_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
- __m256 indexn = _mm256_set_ps(7.0f, 6.0f, 5.0f, 4.0f, 3.0f, 2.0f, 1.0f, 0.0f);
+ indexn = n0;
for(unsigned int n = 0; n < avx_iters; n++)
{
- __builtin_prefetch(&_result[current_correlator_tap][8 * n + 7], 1, 0);
- __builtin_prefetch(&local_code_chip_index[8]);
aux = _mm256_mul_ps(code_phase_step_chips_reg, indexn);
aux = _mm256_add_ps(aux, aux2);
// floor
aux = _mm256_floor_ps(aux);
+ negatives = _mm256_cmp_ps(aux, zeros, 0x01);
+ aux3 = _mm256_and_ps(code_length_chips_reg_f, negatives);
+ aux = _mm256_add_ps(aux, aux3);
// fmod
c = _mm256_div_ps(aux, code_length_chips_reg_f);
i = _mm256_cvttps_epi32(c);
cTrunc = _mm256_cvtepi32_ps(i);
base = _mm256_mul_ps(cTrunc, code_length_chips_reg_f);
- aux = _mm256_sub_ps(aux, base);
+ local_code_chip_index_reg = _mm256_cvttps_epi32(_mm256_sub_ps(aux, base));
- negatives = _mm256_cmp_ps(aux, zeros, 0x01);
- aux2 = _mm256_and_ps(code_length_chips_reg_f, negatives);
- local_code_chip_index_reg = _mm256_cvtps_epi32(_mm256_add_ps(aux, aux2));
_mm256_store_si256((__m256i*)local_code_chip_index, local_code_chip_index_reg);
for(unsigned int k = 0; k < 8; ++k)
{
@@ -412,17 +406,15 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_avx(lv_16sc_t** res
}
}
_mm256_zeroupper();
-
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
- for(unsigned int n = avx_iters * 8; n < num_output_samples; n++)
+ for(unsigned int n = avx_iters * 8; n < num_points; n++)
{
// resample code for current tap
- __builtin_prefetch(&_result[current_correlator_tap][n], 1, 0);
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -433,10 +425,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_a_avx(lv_16sc_t** res
#ifdef LV_HAVE_AVX
#include <immintrin.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int avx_iters = num_output_samples / 8;
+ const unsigned int avx_iters = num_points / 8;
const __m256 eights = _mm256_set1_ps(8.0f);
const __m256 rem_code_phase_chips_reg = _mm256_set1_ps(rem_code_phase_chips);
@@ -447,15 +439,16 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** res
const __m256 zeros = _mm256_setzero_ps();
const __m256 code_length_chips_reg_f = _mm256_set1_ps((float)code_length_chips);
+ const __m256 n0 = _mm256_set_ps(7.0f, 6.0f, 5.0f, 4.0f, 3.0f, 2.0f, 1.0f, 0.0f);
__m256i local_code_chip_index_reg, i;
- __m256 aux, aux2, shifts_chips_reg, c, cTrunc, base, negatives;
+ __m256 aux, aux2, aux3, shifts_chips_reg, c, cTrunc, base, negatives, indexn;
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
shifts_chips_reg = _mm256_set1_ps((float)shifts_chips[current_correlator_tap]);
aux2 = _mm256_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
- __m256 indexn = _mm256_set_ps(7.0f, 6.0f, 5.0f, 4.0f, 3.0f, 2.0f, 1.0f, 0.0f);
+ indexn = n0;
for(unsigned int n = 0; n < avx_iters; n++)
{
aux = _mm256_mul_ps(code_phase_step_chips_reg, indexn);
@@ -463,16 +456,15 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** res
// floor
aux = _mm256_floor_ps(aux);
+ negatives = _mm256_cmp_ps(aux, zeros, 0x01);
+ aux3 = _mm256_and_ps(code_length_chips_reg_f, negatives);
+ aux = _mm256_add_ps(aux, aux3);
// fmod
c = _mm256_div_ps(aux, code_length_chips_reg_f);
i = _mm256_cvttps_epi32(c);
cTrunc = _mm256_cvtepi32_ps(i);
base = _mm256_mul_ps(cTrunc, code_length_chips_reg_f);
- aux = _mm256_sub_ps(aux, base);
-
- negatives = _mm256_cmp_ps(aux, zeros, 0x01);
- aux2 = _mm256_and_ps(code_length_chips_reg_f, negatives);
- local_code_chip_index_reg = _mm256_cvtps_epi32(_mm256_add_ps(aux, aux2));
+ local_code_chip_index_reg = _mm256_cvttps_epi32(_mm256_sub_ps(aux, base));
_mm256_store_si256((__m256i*)local_code_chip_index, local_code_chip_index_reg);
for(unsigned int k = 0; k < 8; ++k)
@@ -485,13 +477,13 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** res
_mm256_zeroupper();
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
- for(unsigned int n = avx_iters * 8; n < num_output_samples; n++)
+ for(unsigned int n = avx_iters * 8; n < num_points; n++)
{
// resample code for current tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
- local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
//Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
+ local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
}
}
@@ -502,10 +494,10 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_u_avx(lv_16sc_t** res
#ifdef LV_HAVE_NEON
#include <arm_neon.h>
-static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_neon(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
+static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_neon(lv_16sc_t** result, const lv_16sc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{
lv_16sc_t** _result = result;
- const unsigned int neon_iters = num_output_samples / 4;
+ const unsigned int neon_iters = num_points / 4;
const int32x4_t ones = vdupq_n_s32(1);
const float32x4_t fours = vdupq_n_f32(4.0f);
const float32x4_t rem_code_phase_chips_reg = vdupq_n_f32(rem_code_phase_chips);
@@ -562,7 +554,7 @@ static inline void volk_gnsssdr_16ic_xn_resampler2_16ic_xn_neon(lv_16sc_t** resu
}
indexn = vaddq_f32(indexn, fours);
}
- for(unsigned int n = neon_iters * 4; n < num_output_samples; n++)
+ for(unsigned int n = neon_iters * 4; n < num_points; n++)
{
__builtin_prefetch(&_result[current_correlator_tap][n], 1, 0);
// resample code for current tap
--
Alioth's /usr/local/bin/git-commit-notice on /srv/git.debian.org/git/pkg-hamradio/gnss-sdr.git
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