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prefetching data in neon implementation

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5% of average improvement
This commit is contained in:
Carles Fernandez
2016-02-13 14:26:40 +01:00
parent a4e2ceb9c4
commit e8dfd860fb
1 changed files with 1 additions and 1 deletions
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src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_x2_rotator_dot_prod_16ic_xn.h
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@@ -520,7 +520,7 @@ static inline void volk_gnsssdr_16ic_x2_rotator_dot_prod_16ic_xn_neon(lv_16sc_t*
for (int n_vec = 0; n_vec < num_a_vectors; n_vec++)
{
a_val = vld2_s16((int16_t*)&(_in_a[n_vec][number*4])); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg
__builtin_prefetch(&_in_a[n_vec][number*4] + 8);
// multiply the real*real and imag*imag to get real result
// a0r*b0r|a1r*b1r|a2r*b2r|a3r*b3r
tmp_real16.val[0] = vmul_s16(a_val.val[0], tmp16.val[0]);