VE7UWU
/
sdrangel
mirror of https://github.com/f4exb/sdrangel.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Improve int halfband filter even/odd I/Q stride variant

This commit is contained in:
f4exb 2016-11-10 02:56:49 +01:00
parent c91725fe01
commit efbce97a2f
1 changed files with 10 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sdrbase/dsp/inthalfbandfiltersti.h
View File

@ -42,38 +42,37 @@ public:
#if defined(USE_SSE4_1)
int a = HBFIRFilterTraits<HBFilterOrder>::hbOrder - 2; // tip
int b = 0; // tail
const __m128i* h = (const __m128i*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
const int *h = (const int*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
__m128i sum = _mm_setzero_si128();
__m128i shh, sa, sb;
int32_t sums[4] __attribute__ ((aligned (16)));
for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 16; i++)
{
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(0,0,0,0));
shh = _mm_set_epi32(h[4*i], h[4*i], h[4*i], h[4*i]);
sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_load_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(1,1,1,1));
shh = _mm_set_epi32(h[4*i+1], h[4*i+1], h[4*i+1], h[4*i+1]);
sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_load_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(2,2,2,2));
shh = _mm_set_epi32(h[4*i+2], h[4*i+2], h[4*i+2], h[4*i+2]);
sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_load_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(3,3,3,3));
shh = _mm_set_epi32(h[4*i+3], h[4*i+3], h[4*i+3], h[4*i+3]);
sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_load_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
++h;
}
// Extract values from sum vector
@ -95,38 +94,37 @@ public:
#if defined(USE_SSE4_1)
int a = ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder - 2; // tip
int b = ptr + 0; // tail
const __m128i* h = (const __m128i*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
const int *h = (const int*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
__m128i sum = _mm_setzero_si128();
__m128i shh, sa, sb;
int32_t sums[4] __attribute__ ((aligned (16)));
for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 16; i++)
{
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(0,0,0,0));
shh = _mm_set_epi32(h[4*i], h[4*i], h[4*i], h[4*i]);
sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(1,1,1,1));
shh = _mm_set_epi32(h[4*i+1], h[4*i+1], h[4*i+1], h[4*i+1]);
sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(2,2,2,2));
shh = _mm_set_epi32(h[4*i+2], h[4*i+2], h[4*i+2], h[4*i+2]);
sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
shh = _mm_shuffle_epi32(*h, _MM_SHUFFLE(3,3,3,3));
shh = _mm_set_epi32(h[4*i+3], h[4*i+3], h[4*i+3], h[4*i+3]);
sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
a -= 2;
b += 2;
++h;
}
// Extract values from sum vector