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Range reduced to 4 bits in the volk short int test input to avoid

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saturation of vector dot products.
Reduced test vector sizes to 8111 to avoid saturation.
This commit is contained in:
Javier Arribas 2016-01-14 18:56:22 +01:00
parent 5fdbb472f6
commit fb42cda826
4 changed files with 11 additions and 14 deletions
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2
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/apps/volk_gnsssdr_profile.cc
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@ -48,7 +48,7 @@ int main(int argc, char *argv[]) {
boost::program_options::value<float>()->default_value( 1e-6 ),
"Set the default error tolerance for tests")
("vlen,v",
boost::program_options::value<int>()->default_value( 131071 ),
boost::program_options::value<int>()->default_value( 8111 ), //it is also prime
"Set the default vector length for tests") // default is a mersenne prime
("iter,i",
boost::program_options::value<int>()->default_value( 1987 ),

10
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_x2_dot_prod_16ic.h
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@ -40,6 +40,7 @@
#include <volk_gnsssdr/volk_gnsssdr_common.h>
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
#include <volk_gnsssdr/saturation_arithmetic.h>
//#include <stdio.h>
#ifdef LV_HAVE_GENERIC
@ -56,12 +57,10 @@ static inline void volk_gnsssdr_16ic_x2_dot_prod_16ic_generic(lv_16sc_t* result,
for (unsigned int n = 0; n < num_points; n++)
{
//r*a.r - i*a.i, i*a.r + r*a.i
//result[0]+=in_a[n]*in_b[n];
lv_16sc_t tmp = in_a[n] * in_b[n];
result[0] = lv_cmake(sat_adds16i(lv_creal(result[0]), lv_creal(tmp)), sat_adds16i(lv_cimag(result[0]), lv_cimag(tmp) ));
//result[0].real(sat_adds16i(result[0].real(),lv_creal(tmp)));
//result[0].imag(sat_adds16i(result[0].imag(),tmp.imag()));
}
//printf("generic result = %i,%i", lv_creal(result[0]),lv_cimag(result[0]));
}
#endif /*LV_HAVE_GENERIC*/
@ -129,18 +128,13 @@ static inline void volk_gnsssdr_16ic_x2_dot_prod_16ic_a_sse2(lv_16sc_t* out, con
for (int i = 0; i < 4; ++i)
{
dotProduct = lv_cmake(sat_adds16i(lv_creal(dotProduct), lv_creal(dotProductVector[i])), sat_adds16i(lv_cimag(dotProduct), lv_cimag(dotProductVector[i])));
//dotProduct.real(sat_adds16i(lv_creal(dotProduct),lv_creal(dotProductVector[i])));
//dotProduct.imag(sat_adds16i(lv_cimag(dotProduct),lv_cimag(dotProductVector[i])));
}
}
for (unsigned int i = 0; i < (num_points % 4); ++i)
{
//dotProduct += (*_in_a++) * (*_in_b++);
lv_16sc_t tmp = (*_in_a++) * (*_in_b++);
dotProduct = lv_cmake( sat_adds16i(lv_creal(dotProduct), lv_creal(tmp)), sat_adds16i(lv_cimag(dotProduct), lv_cimag(tmp)));
//dotProduct.real(sat_adds16i(lv_creal(dotProduct),lv_creal(tmp)));
//dotProduct.imag(sat_adds16i(lv_cimag(dotProduct),lv_cimag(tmp)));
}
*_out = dotProduct;

2
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/kernel_tests.h
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@ -72,7 +72,7 @@ std::vector<volk_gnsssdr_test_case_t> init_test_list(volk_gnsssdr_test_params_t
(VOLK_INIT_TEST(volk_gnsssdr_32fc_convert_16ic, test_params))
(VOLK_INIT_TEST(volk_gnsssdr_16ic_x2_dot_prod_16ic, test_params))
(VOLK_INIT_TEST(volk_gnsssdr_16ic_x2_multiply_16ic, test_params))
(VOLK_INIT_TEST(volk_gnsssdr_16ic_x2_dot_prod_16ic_xn, volk_gnsssdr_test_params_t(1e-2, test_params.scalar(), test_params.vlen(), test_params.iter(), test_params.benchmark_mode(), test_params.kernel_regex())))
//(VOLK_INIT_TEST(volk_gnsssdr_16ic_x2_dot_prod_16ic_xn,test_params))
//(VOLK_INIT_TEST(volk_gnsssdr_16ic_resampler_16ic, test_params))
//(VOLK_INIT_TEST(volk_gnsssdr_16ic_xn_resampler_16ic_xn, test_params))
;

11
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/qa_utils.cc
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@ -73,13 +73,16 @@ void load_random_data(void *data, volk_gnsssdr_type_t type, unsigned int n)
break;
case 4:
if(type.is_signed) ((int32_t *)data)[i] = (int32_t) scaled_rand;
else ((uint32_t *)data)[i] = (uint32_t) scaled_rand;
if(type.is_signed) ((int32_t *)data)[i] = (int32_t) scaled_rand;
else ((uint32_t *)data)[i] = (uint32_t) scaled_rand;
break;
case 2:
if(type.is_signed) ((int16_t *)data)[i] = (int16_t) scaled_rand / 11; //sqrt(std::abs(scaled_rand / 2.0)); //// std::cout << "222222222222" << std::endl;}
else ((uint16_t *)data)[i] = (uint16_t) scaled_rand;
// 16 bits dot product saturates very fast even with moderate lenght vectors
// we produce here only 4 bits input range
if(type.is_signed) ((int16_t *)data)[i] = (int16_t)((int16_t) scaled_rand % 16);
else ((uint16_t *)data)[i] = (uint16_t) (int16_t)((int16_t) scaled_rand % 16);
break;
case 1:
if(type.is_signed) ((int8_t *)data)[i] = (int8_t) scaled_rand;