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SinCos_32f

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This commit is contained in:
Ilya Lavrenov 2015-01-12 10:59:31 +03:00
parent 3b23e57925
commit 1d3c860411
1 changed files with 66 additions and 2 deletions
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68
modules/core/src/mathfuncs.cpp
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@ -824,14 +824,78 @@ static void SinCos_32f( const float *angle, float *sinval, float* cosval,
/*static const double cos_a2 = 1;*/
double k1;
int i;
int i = 0;
if( !angle_in_degrees )
k1 = N/(2*CV_PI);
else
k1 = N/360.;
for( i = 0; i < len; i++ )
#if CV_AVX2
__m128d v_i = _mm_set_pd(1, 0);
__m128d v_k1 = _mm_set1_pd(k1);
__m128d v_1 = _mm_set1_pd(1);
__m128i v_N1 = _mm_set1_epi32(N - 1);
__m128i v_N4 = _mm_set1_epi32(N >> 2);
__m128d v_sin_a0 = _mm_set1_pd(sin_a0);
__m128d v_sin_a2 = _mm_set1_pd(sin_a2);
__m128d v_cos_a0 = _mm_set1_pd(cos_a0);
if (USE_AVX2)
{
for ( ; i <= len - 4; i += 4)
{
__m128 v_angle = _mm_loadu_ps(angle + i);
// 0-1
__m128d v_t = _mm_mul_pd(_mm_cvtps_pd(v_angle), v_k1);
__m128i v_it = _mm_cvtpd_epi32(v_t);
v_t = _mm_sub_pd(v_t, _mm_cvtepi32_pd(v_it));
__m128i v_sin_idx = _mm_and_si128(v_it, v_N1);
__m128i v_cos_idx = _mm_and_si128(_mm_sub_epi32(v_N4, v_sin_idx), v_N1);
__m128d v_t2 = _mm_mul_pd(v_t, v_t);
__m128d v_sin_b = _mm_mul_pd(_mm_add_pd(_mm_mul_pd(v_sin_a0, v_t2), v_sin_a2), v_t);
__m128d v_cos_b = _mm_add_pd(_mm_mul_pd(v_cos_a0, v_t2), v_1);
__m128d v_sin_a = _mm_i32gather_pd(sin_table, v_sin_idx, 1);
__m128d v_cos_a = _mm_i32gather_pd(sin_table, v_cos_idx, 1);
__m128d v_sin_val_0 = _mm_add_pd(_mm_mul_pd(v_sin_a, v_cos_b),
_mm_mul_pd(v_cos_a, v_sin_b));
__m128d v_cos_val_0 = _mm_sub_pd(_mm_mul_pd(v_cos_a, v_cos_b),
_mm_mul_pd(v_sin_a, v_sin_b));
// 2-3
v_t = _mm_mul_pd(_mm_cvtps_pd(_mm_castsi128_ps(_mm_slli_si128(_mm_castps_si128(v_angle), 8))), v_k1);
v_it = _mm_cvtpd_epi32(v_t);
v_t = _mm_sub_pd(v_t, _mm_cvtepi32_pd(v_it));
v_sin_idx = _mm_and_si128(v_it, v_N1);
v_cos_idx = _mm_and_si128(_mm_sub_epi32(v_N4, v_sin_idx), v_N1);
v_t2 = _mm_mul_pd(v_t, v_t);
v_sin_b = _mm_mul_pd(_mm_add_pd(_mm_mul_pd(v_sin_a0, v_t2), v_sin_a2), v_t);
v_cos_b = _mm_add_pd(_mm_mul_pd(v_cos_a0, v_t2), v_1);
v_sin_a = _mm_i32gather_pd(sin_table, v_sin_idx, 1);
v_cos_a = _mm_i32gather_pd(sin_table, v_cos_idx, 1);
__m128d v_sin_val_1 = _mm_add_pd(_mm_mul_pd(v_sin_a, v_cos_b),
_mm_mul_pd(v_cos_a, v_sin_b));
__m128d v_cos_val_1 = _mm_sub_pd(_mm_mul_pd(v_cos_a, v_cos_b),
_mm_mul_pd(v_sin_a, v_sin_b));
_mm_storeu_ps(sinval + i, _mm_movelh_ps(_mm_cvtpd_ps(v_sin_val_0),
_mm_cvtpd_ps(v_sin_val_1)));
_mm_storeu_ps(cosval + i, _mm_movelh_ps(_mm_cvtpd_ps(v_cos_val_0),
_mm_cvtpd_ps(v_cos_val_1)));
}
}
#endif
for( ; i < len; i++ )
{
double t = angle[i]*k1;
int it = cvRound(t);