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add unaligned version

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This commit is contained in:
Carles Fernandez 2016-01-20 18:38:33 +01:00
parent c7193e394e
commit 497c856437
1 changed files with 51 additions and 0 deletions
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51
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_16ic_x2_multiply_16ic.h
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@ -69,6 +69,57 @@ static inline void volk_gnsssdr_16ic_x2_multiply_16ic_a_sse2(lv_16sc_t* out, con
mask_imag = _mm_set_epi8(255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0);
mask_real = _mm_set_epi8(0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255);
const lv_16sc_t* _in_a = in_a;
const lv_16sc_t* _in_b = in_b;
lv_16sc_t* _out = out;
for(unsigned int number = 0; number < sse_iters; number++)
{
//std::complex<T> memory structure: real part -> reinterpret_cast<cv T*>(a)[2*i]
//imaginery part -> reinterpret_cast<cv T*>(a)[2*i + 1]
// a[127:0]=[a3.i,a3.r,a2.i,a2.r,a1.i,a1.r,a0.i,a0.r]
a = _mm_load_si128((__m128i*)_in_a); //load (2 byte imag, 2 byte real) x 4 into 128 bits reg
b = _mm_load_si128((__m128i*)_in_b);
c = _mm_mullo_epi16 (a, b); // a3.i*b3.i, a3.r*b3.r, ....
c_sr = _mm_srli_si128 (c, 2); // Shift a right by imm8 bytes while shifting in zeros, and store the results in dst.
real = _mm_subs_epi16 (c, c_sr);
real = _mm_and_si128 (real, mask_real); // a3.r*b3.r-a3.i*b3.i , 0, a3.r*b3.r- a3.i*b3.i
b_sl = _mm_slli_si128(b, 2); // b3.r, b2.i ....
a_sl = _mm_slli_si128(a, 2); // a3.r, a2.i ....
imag1 = _mm_mullo_epi16(a, b_sl); // a3.i*b3.r, ....
imag2 = _mm_mullo_epi16(b, a_sl); // b3.i*a3.r, ....
imag = _mm_adds_epi16(imag1, imag2);
imag = _mm_and_si128 (imag, mask_imag); // a3.i*b3.r+b3.i*a3.r, 0, ...
result = _mm_or_si128 (real, imag);
_mm_store_si128((__m128i*)_out, result);
_in_a += 4;
_in_b += 4;
_out += 4;
}
for (unsigned int i = sse_iters * 4; i < num_points; ++i)
{
*_out++ = (*_in_a++) * (*_in_b++);
}
}
#endif /* LV_HAVE_SSE2 */
#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
static inline void volk_gnsssdr_16ic_x2_multiply_16ic_u_sse2(lv_16sc_t* out, const lv_16sc_t* in_a, const lv_16sc_t* in_b, unsigned int num_points)
{
const unsigned int sse_iters = num_points / 4;
__m128i a,b,c, c_sr, mask_imag, mask_real, real, imag, imag1,imag2, b_sl, a_sl, result;
mask_imag = _mm_set_epi8(255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0);
mask_real = _mm_set_epi8(0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255);
const lv_16sc_t* _in_a = in_a;
const lv_16sc_t* _in_b = in_b;
lv_16sc_t* _out = out;