mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2025-08-07 22:43:52 +00:00
Code Issues Releases Wiki Activity

prefetching data in the cache

Browse Source
This commit is contained in:
Carles Fernandez 2016-03-07 19:57:22 +01:00
parent aac79eb78a
commit 59011a7772
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_x2_dot_prod_16ic_xn.h
View File

@ -107,6 +107,7 @@ static inline void volk_gnsssdr_16ic_x2_dot_prod_16ic_xn_a_sse2(lv_16sc_t* resul
{ {
// b[127:0]=[a3.i,a3.r,a2.i,a2.r,a1.i,a1.r,a0.i,a0.r] // b[127:0]=[a3.i,a3.r,a2.i,a2.r,a1.i,a1.r,a0.i,a0.r]
b = _mm_load_si128((__m128i*)_in_common); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg b = _mm_load_si128((__m128i*)_in_common); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg
__builtin_prefetch(_in_common + 8);
for (int n_vec = 0; n_vec < num_a_vectors; n_vec++) for (int n_vec = 0; n_vec < num_a_vectors; n_vec++)
{ {
a = _mm_load_si128((__m128i*)&(_in_a[n_vec][number*4])); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg a = _mm_load_si128((__m128i*)&(_in_a[n_vec][number*4])); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg
@ -204,6 +205,7 @@ static inline void volk_gnsssdr_16ic_x2_dot_prod_16ic_xn_u_sse2(lv_16sc_t* resul
{ {
// b[127:0]=[a3.i,a3.r,a2.i,a2.r,a1.i,a1.r,a0.i,a0.r] // b[127:0]=[a3.i,a3.r,a2.i,a2.r,a1.i,a1.r,a0.i,a0.r]
b = _mm_loadu_si128((__m128i*)_in_common); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg b = _mm_loadu_si128((__m128i*)_in_common); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg
__builtin_prefetch(_in_common + 8);
for (int n_vec = 0; n_vec < num_a_vectors; n_vec++) for (int n_vec = 0; n_vec < num_a_vectors; n_vec++)
{ {
a = _mm_loadu_si128((__m128i*)&(_in_a[n_vec][number*4])); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg a = _mm_loadu_si128((__m128i*)&(_in_a[n_vec][number*4])); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg