return nz;
}
-#if CV_SSE2
-
-static const uchar * initPopcountTable()
-{
- static uchar tab[256];
- static volatile bool initialized = false;
- if( !initialized )
- {
- // we compute inverse popcount table,
- // since we pass (img[x] == 0) mask as index in the table.
- unsigned int j = 0u;
-#if CV_POPCNT
- if (checkHardwareSupport(CV_CPU_POPCNT))
- {
- for( ; j < 256u; j++ )
- tab[j] = (uchar)(8 - _mm_popcnt_u32(j));
- }
-#endif
- for( ; j < 256u; j++ )
- {
- int val = 0;
- for( int mask = 1; mask < 256; mask += mask )
- val += (j & mask) == 0;
- tab[j] = (uchar)val;
- }
- initialized = true;
- }
-
- return tab;
-}
-
-#endif
-
static int countNonZero8u( const uchar* src, int len )
{
int i=0, nz = 0;
#if CV_SSE2
if(USE_SSE2)//5x-6x
{
- __m128i pattern = _mm_setzero_si128 ();
- static const uchar * tab = initPopcountTable();
+ __m128i v_zero = _mm_setzero_si128();
+ __m128i sum = _mm_setzero_si128();
for (; i<=len-16; i+=16)
{
__m128i r0 = _mm_loadu_si128((const __m128i*)(src+i));
- int val = _mm_movemask_epi8(_mm_cmpeq_epi8(r0, pattern));
- nz += tab[val & 255] + tab[val >> 8];
+ sum = _mm_add_epi32(sum, _mm_sad_epu8(_mm_sub_epi8(v_zero, _mm_cmpeq_epi8(r0, v_zero)), v_zero));
}
+ nz = i - _mm_cvtsi128_si32(_mm_add_epi32(sum, _mm_unpackhi_epi64(sum, sum)));
}
#elif CV_NEON
int len0 = len & -16, blockSize1 = (1 << 8) - 16, blockSize0 = blockSize1 << 6;
if (USE_SSE2)
{
__m128i v_zero = _mm_setzero_si128 ();
- static const uchar * tab = initPopcountTable();
+ __m128i sum = _mm_setzero_si128();
for ( ; i <= len - 8; i += 8)
{
- __m128i v_src = _mm_loadu_si128((const __m128i*)(src + i));
- int val = _mm_movemask_epi8(_mm_packs_epi16(_mm_cmpeq_epi16(v_src, v_zero), v_zero));
- nz += tab[val];
+ __m128i r0 = _mm_loadu_si128((const __m128i*)(src + i));
+ sum = _mm_add_epi32(sum, _mm_sad_epu8(_mm_sub_epi8(v_zero, _mm_cmpeq_epi16(r0, v_zero)), v_zero));
}
+ nz = i - (_mm_cvtsi128_si32(_mm_add_epi32(sum, _mm_unpackhi_epi64(sum, sum))) >> 1);
src += i;
}
#elif CV_NEON
if (USE_SSE2)
{
__m128i v_zero = _mm_setzero_si128 ();
- static const uchar * tab = initPopcountTable();
+ __m128i sum = _mm_setzero_si128();
- for ( ; i <= len - 8; i += 8)
+ for ( ; i <= len - 4; i += 4)
{
- __m128i v_src = _mm_loadu_si128((const __m128i*)(src + i));
- __m128i v_dst0 = _mm_cmpeq_epi32(v_src, v_zero);
-
- v_src = _mm_loadu_si128((const __m128i*)(src + i + 4));
- __m128i v_dst1 = _mm_cmpeq_epi32(v_src, v_zero);
-
- int val = _mm_movemask_epi8(_mm_packs_epi16(_mm_packs_epi32(v_dst0, v_dst1), v_zero));
- nz += tab[val];
+ __m128i r0 = _mm_loadu_si128((const __m128i*)(src + i));
+ sum = _mm_add_epi32(sum, _mm_sad_epu8(_mm_sub_epi8(v_zero, _mm_cmpeq_epi32(r0, v_zero)), v_zero));
}
+ nz = i - (_mm_cvtsi128_si32(_mm_add_epi32(sum, _mm_unpackhi_epi64(sum, sum))) >> 2);
src += i;
}
#elif CV_NEON
#if CV_SSE2
if (USE_SSE2)
{
- __m128i v_zero_i = _mm_setzero_si128();
__m128 v_zero_f = _mm_setzero_ps();
- static const uchar * tab = initPopcountTable();
+ __m128i v_zero = _mm_setzero_si128 ();
+ __m128i sum = _mm_setzero_si128();
- for ( ; i <= len - 8; i += 8)
+ for ( ; i <= len - 4; i += 4)
{
- __m128i v_dst0 = _mm_castps_si128(_mm_cmpeq_ps(_mm_loadu_ps(src + i), v_zero_f));
- __m128i v_dst1 = _mm_castps_si128(_mm_cmpeq_ps(_mm_loadu_ps(src + i + 4), v_zero_f));
-
- int val = _mm_movemask_epi8(_mm_packs_epi16(_mm_packs_epi32(v_dst0, v_dst1), v_zero_i));
- nz += tab[val];
+ __m128 r0 = _mm_loadu_ps(src + i);
+ sum = _mm_add_epi32(sum, _mm_sad_epu8(_mm_sub_epi8(v_zero, _mm_castps_si128(_mm_cmpeq_ps(r0, v_zero_f))), v_zero));
}
+ nz = i - (_mm_cvtsi128_si32(_mm_add_epi32(sum, _mm_unpackhi_epi64(sum, sum))) >> 2);
src += i;
}
#elif CV_NEON
static int countNonZero64f( const double* src, int len )
{
- int i = 0, nz = 0;
-#if CV_SSE2
- if (USE_SSE2)
- {
- __m128i v_zero_i = _mm_setzero_si128();
- __m128d v_zero_d = _mm_setzero_pd();
- static const uchar * tab = initPopcountTable();
-
- for ( ; i <= len - 8; i += 8)
- {
- __m128i v_dst0 = _mm_castpd_si128(_mm_cmpeq_pd(_mm_loadu_pd(src + i), v_zero_d));
- __m128i v_dst1 = _mm_castpd_si128(_mm_cmpeq_pd(_mm_loadu_pd(src + i + 2), v_zero_d));
- __m128i v_dst2 = _mm_castpd_si128(_mm_cmpeq_pd(_mm_loadu_pd(src + i + 4), v_zero_d));
- __m128i v_dst3 = _mm_castpd_si128(_mm_cmpeq_pd(_mm_loadu_pd(src + i + 6), v_zero_d));
-
- v_dst0 = _mm_packs_epi32(v_dst0, v_dst1);
- v_dst1 = _mm_packs_epi32(v_dst2, v_dst3);
-
- int val = _mm_movemask_epi8(_mm_packs_epi16(_mm_packs_epi32(v_dst0, v_dst1), v_zero_i));
- nz += tab[val];
- }
-
- src += i;
- }
-#endif
- return nz + countNonZero_(src, len - i);
+ return countNonZero_(src, len);
}
typedef int (*CountNonZeroFunc)(const uchar*, int);