void AVXFMA4DNoise(Vector3d& result, const Vector3d& EPoint)
{
DBL x, y, z;
int ix, iy, iz;
int ixiy_hash, ixjy_hash, jxiy_hash, jxjy_hash;
// TODO FIXME - global statistics reference
// Stats[Calls_To_DNoise]++;
x = EPoint[X];
y = EPoint[Y];
z = EPoint[Z];
/* its equivalent integer lattice point. */
/*ix = (int)x; iy = (int)y; iz = (int)z;
x_ix = x - ix; y_iy = y - iy; z_iz = z - iz;*/
/* JB fix for the range problem */
__m128d xy = _mm_setr_pd(x, y);
__m128d zn = _mm_set_sd(z);
__m128d epsy = _mm_set1_pd(1.0 - EPSILON);
__m128d xy_e = _mm_sub_pd(xy, epsy);
__m128d zn_e = _mm_sub_sd(zn, epsy);
__m128i tmp_xy = _mm_cvttpd_epi32(_mm_blendv_pd(xy, xy_e, xy));
__m128i tmp_zn = _mm_cvttpd_epi32(_mm_blendv_pd(zn, zn_e, zn));
__m128i noise_min_xy = _mm_setr_epi32(NOISE_MINX, NOISE_MINY, 0, 0);
__m128i noise_min_zn = _mm_set1_epi32(NOISE_MINZ);
__m128d xy_ixy = _mm_sub_pd(xy, _mm_cvtepi32_pd(tmp_xy));
__m128d zn_izn = _mm_sub_sd(zn, _mm_cvtepi32_pd(tmp_zn));
const __m128i fff = _mm_set1_epi32(0xfff);
__m128i i_xy = _mm_and_si128(_mm_sub_epi32(tmp_xy, noise_min_xy), fff);
__m128i i_zn = _mm_and_si128(_mm_sub_epi32(tmp_zn, noise_min_zn), fff);
ix = _mm_extract_epi32(i_xy, 0);
iy = _mm_extract_epi32(i_xy, 1);
iz = _mm_extract_epi32(i_zn, 0);
ixiy_hash = Hash2d(ix, iy);
jxiy_hash = Hash2d(ix + 1, iy);
ixjy_hash = Hash2d(ix, iy + 1);
jxjy_hash = Hash2d(ix + 1, iy + 1);
DBL* mp1 = &RTable[Hash1dRTableIndex(ixiy_hash, iz)];
DBL* mp2 = &RTable[Hash1dRTableIndex(jxiy_hash, iz)];
DBL* mp3 = &RTable[Hash1dRTableIndex(jxjy_hash, iz)];
DBL* mp4 = &RTable[Hash1dRTableIndex(ixjy_hash, iz)];
DBL* mp5 = &RTable[Hash1dRTableIndex(ixjy_hash, iz + 1)];
DBL* mp6 = &RTable[Hash1dRTableIndex(jxjy_hash, iz + 1)];
DBL* mp7 = &RTable[Hash1dRTableIndex(jxiy_hash, iz + 1)];
DBL* mp8 = &RTable[Hash1dRTableIndex(ixiy_hash, iz + 1)];
const __m128d three = _mm_set1_pd(3.0);
const __m128d two = _mm_set1_pd(2.0);
const __m128d one = _mm_set1_pd(1.0);
__m128d ix_mm = _mm_unpacklo_pd(xy_ixy, xy_ixy);
__m128d iy_mm = _mm_unpackhi_pd(xy_ixy, xy_ixy);
__m128d iz_mm = _mm_unpacklo_pd(zn_izn, zn_izn);
__m128d jx_mm = _mm_sub_pd(ix_mm, one);
__m128d jy_mm = _mm_sub_pd(iy_mm, one);
__m128d jz_mm = _mm_sub_pd(iz_mm, one);
__m128d mm_sz = _mm_mul_pd(_mm_mul_pd(iz_mm, iz_mm), _mm_nmacc_pd(two, iz_mm, three));
__m128d mm_tz = _mm_sub_pd(one, mm_sz);
__m128d mm_sxy = _mm_mul_pd(_mm_mul_pd(xy_ixy, xy_ixy), _mm_nmacc_pd(two, xy_ixy, three));
__m128d mm_txy = _mm_sub_pd(one, mm_sxy);
__m128d mm_tysy = _mm_unpackhi_pd(mm_txy, mm_sxy);
__m128d mm_txty_txsy = _mm_mul_pd(_mm_unpacklo_pd(mm_txy, mm_txy), mm_tysy);
__m128d mm_sxty_sxsy = _mm_mul_pd(_mm_unpacklo_pd(mm_sxy, mm_sxy), mm_tysy);
__m128d mm_txty_txsy_tz = _mm_mul_pd(mm_txty_txsy, mm_tz);
__m128d mm_txty_txsy_sz = _mm_mul_pd(mm_txty_txsy, mm_sz);
__m128d mm_sxty_sxsy_tz = _mm_mul_pd(mm_sxty_sxsy, mm_tz);
__m128d mm_sxty_sxsy_sz = _mm_mul_pd(mm_sxty_sxsy, mm_sz);
__m128d mp_t1, mp_t2, mp1_mm, mp2_mm, mp4_mm, mp6_mm, sum_p;
__m128d sum_X_Y = _mm_setzero_pd();
__m128d sum__Z = _mm_setzero_pd();
__m128d mm_s1 = _mm_unpacklo_pd(mm_txty_txsy_tz, mm_txty_txsy_tz);
INCRSUMP2(mp1, mp1 + 8, mm_s1, ix_mm, iy_mm, iz_mm, sum_X_Y);
__m128d mm_s2 = _mm_unpacklo_pd(mm_sxty_sxsy_tz, mm_sxty_sxsy_tz);
INCRSUMP2(mp2, mp2 + 8, mm_s2, jx_mm, iy_mm, iz_mm, sum_X_Y);
__m128d mm_s3 = _mm_unpackhi_pd(mm_sxty_sxsy_tz, mm_sxty_sxsy_tz);
INCRSUMP2(mp3, mp3 + 8, mm_s3, jx_mm, jy_mm, iz_mm, sum_X_Y);
__m128d mm_s4 = _mm_unpackhi_pd(mm_txty_txsy_tz, mm_txty_txsy_tz);
INCRSUMP2(mp4, mp4 + 8, mm_s4, ix_mm, jy_mm, iz_mm, sum_X_Y);
__m128d mm_s5 = _mm_unpackhi_pd(mm_txty_txsy_sz, mm_txty_txsy_sz);
INCRSUMP2(mp5, mp5 + 8, mm_s5, ix_mm, jy_mm, jz_mm, sum_X_Y);
__m128d mm_s6 = _mm_unpackhi_pd(mm_sxty_sxsy_sz, mm_sxty_sxsy_sz);
INCRSUMP2(mp6, mp6 + 8, mm_s6, jx_mm, jy_mm, jz_mm, sum_X_Y);
__m128d mm_s7 = _mm_unpacklo_pd(mm_sxty_sxsy_sz, mm_sxty_sxsy_sz);
INCRSUMP2(mp7, mp7 + 8, mm_s7, jx_mm, iy_mm, jz_mm, sum_X_Y);
__m128d mm_s8 = _mm_unpacklo_pd(mm_txty_txsy_sz, mm_txty_txsy_sz);
INCRSUMP2(mp8, mp8 + 8, mm_s8, ix_mm, iy_mm, jz_mm, sum_X_Y);
__m128d iy_jy = _mm_unpacklo_pd(iy_mm, jy_mm);
INCRSUMP2(mp1 + 16, mp4 + 16, mm_txty_txsy_tz, ix_mm, iy_jy, iz_mm, sum__Z);
INCRSUMP2(mp8 + 16, mp5 + 16, mm_txty_txsy_sz, ix_mm, iy_jy, jz_mm, sum__Z);
INCRSUMP2(mp2 + 16, mp3 + 16, mm_sxty_sxsy_tz, jx_mm, iy_jy, iz_mm, sum__Z);
INCRSUMP2(mp7 + 16, mp6 + 16, mm_sxty_sxsy_sz, jx_mm, iy_jy, jz_mm, sum__Z);
sum__Z = _mm_hadd_pd(sum__Z, sum__Z);
_mm_storeu_pd(*result, sum_X_Y);
_mm_store_sd(&result[Z], sum__Z);
}
__m128d test_mm_nmacc_pd(__m128d a, __m128d b, __m128d c) {
// CHECK: @llvm.x86.fma.vfnmadd.pd
// CHECK-ASM: vfnmaddpd %xmm{{.*}}, %xmm{{.*}}, %xmm{{.*}}, %xmm{{.*}}
return _mm_nmacc_pd(a, b, c);
}
DBL AVXFMA4Noise(const Vector3d& EPoint, int noise_generator)
{
DBL x, y, z;
DBL *mp;
int ix, iy, iz;
int ixiy_hash, ixjy_hash, jxiy_hash, jxjy_hash;
DBL sum;
// TODO FIXME - global statistics reference
// Stats[Calls_To_Noise]++;
if (noise_generator==kNoiseGen_Perlin)
{
// The 1.59 and 0.985 are to correct for some biasing problems with
// the random # generator used to create the noise tables. Final
// range of values is about 5.0e-4 below 0.0 and above 1.0. Mean
// value is 0.49 (ideally it would be 0.5).
sum = 0.5 * (1.59 * SolidNoise(EPoint) + 0.985);
// Clamp final value to 0-1 range
if (sum < 0.0) sum = 0.0;
if (sum > 1.0) sum = 1.0;
return sum;
}
x = EPoint[X];
y = EPoint[Y];
z = EPoint[Z];
/* its equivalent integer lattice point. */
/* ix = (int)x; iy = (int)y; iz = (long)z; */
/* JB fix for the range problem */
__m128d xy = _mm_setr_pd(x, y);
__m128d zn = _mm_set_sd(z);
__m128d epsy = _mm_set1_pd(1.0 - EPSILON);
__m128d xy_e = _mm_sub_pd(xy, epsy);
__m128d zn_e = _mm_sub_sd(zn, epsy);
__m128i tmp_xy = _mm_cvttpd_epi32(_mm_blendv_pd(xy, xy_e, xy));
__m128i tmp_zn = _mm_cvttpd_epi32(_mm_blendv_pd(zn, zn_e, zn));
__m128i noise_min_xy = _mm_setr_epi32(NOISE_MINX, NOISE_MINY, 0, 0);
__m128i noise_min_zn = _mm_set1_epi32(NOISE_MINZ);
__m128d xy_ixy = _mm_sub_pd(xy, _mm_cvtepi32_pd(tmp_xy));
__m128d zn_izn = _mm_sub_sd(zn, _mm_cvtepi32_pd(tmp_zn));
const __m128i fff = _mm_set1_epi32(0xfff);
__m128i i_xy = _mm_and_si128(_mm_sub_epi32(tmp_xy, noise_min_xy), fff);
__m128i i_zn = _mm_and_si128(_mm_sub_epi32(tmp_zn, noise_min_zn), fff);
ix = _mm_extract_epi32(i_xy, 0);
iy = _mm_extract_epi32(i_xy, 1);
iz = _mm_extract_epi32(i_zn, 0);
ixiy_hash = Hash2d(ix, iy);
jxiy_hash = Hash2d(ix + 1, iy);
ixjy_hash = Hash2d(ix, iy + 1);
jxjy_hash = Hash2d(ix + 1, iy + 1);
mp = &RTable[Hash1dRTableIndex(ixiy_hash, iz)];
DBL *mp2 = &RTable[Hash1dRTableIndex(ixjy_hash, iz)];
DBL *mp3 = &RTable[Hash1dRTableIndex(ixiy_hash, iz + 1)];
DBL *mp4 = &RTable[Hash1dRTableIndex(ixjy_hash, iz + 1)];
DBL *mp5 = &RTable[Hash1dRTableIndex(jxiy_hash, iz)];
DBL *mp6 = &RTable[Hash1dRTableIndex(jxjy_hash, iz)];
DBL *mp7 = &RTable[Hash1dRTableIndex(jxiy_hash, iz + 1)];
DBL *mp8 = &RTable[Hash1dRTableIndex(jxjy_hash, iz + 1)];
const __m128d three = _mm_set1_pd(3.0);
const __m128d two = _mm_set1_pd(2.0);
const __m128d one = _mm_set1_pd(1.0);
__m128d ix_mm = _mm_unpacklo_pd(xy_ixy, xy_ixy);
__m128d iy_mm = _mm_unpackhi_pd(xy_ixy, xy_ixy);
__m128d iz_mm = _mm_unpacklo_pd(zn_izn, zn_izn);
__m128d jx_mm = _mm_sub_pd(ix_mm, one);
__m128d jy_mm = _mm_sub_pd(iy_mm, one);
__m128d jz_mm = _mm_sub_pd(iz_mm, one);
__m128d mm_sxy = _mm_mul_pd(_mm_mul_pd(xy_ixy, xy_ixy), _mm_nmacc_pd(two, xy_ixy, three));
__m128d mm_sz = _mm_mul_pd(_mm_mul_pd(iz_mm, iz_mm), _mm_nmacc_pd(two, iz_mm, three));
__m128d mm_tz = _mm_sub_pd(one, mm_sz);
__m128d mm_txy = _mm_sub_pd(one, mm_sxy);
__m128d mm_tysy = _mm_unpackhi_pd(mm_txy, mm_sxy);
__m128d mm_txty_txsy = _mm_mul_pd(_mm_unpacklo_pd(mm_txy, mm_txy), mm_tysy);
__m128d mm_sxty_sxsy = _mm_mul_pd(_mm_unpacklo_pd(mm_sxy, mm_sxy), mm_tysy);
__m128d y_mm = _mm_unpacklo_pd(iy_mm, jy_mm);
__m128d mp_t1, mp_t2, mp1_mm, mp2_mm, mp4_mm, mp6_mm, sum_p, s_mm;
__m128d int_sum1 = _mm_setzero_pd();
s_mm = _mm_mul_pd(mm_txty_txsy, mm_tz);
INCRSUMP2(mp, mp2, s_mm, ix_mm, y_mm, iz_mm, int_sum1);
s_mm = _mm_mul_pd(mm_txty_txsy, mm_sz);
INCRSUMP2(mp3, mp4, s_mm, ix_mm, y_mm, jz_mm, int_sum1);
s_mm = _mm_mul_pd(mm_sxty_sxsy, mm_tz);
INCRSUMP2(mp5, mp6, s_mm, jx_mm, y_mm, iz_mm, int_sum1);
s_mm = _mm_mul_pd(mm_sxty_sxsy, mm_sz);
INCRSUMP2(mp7, mp8, s_mm, jx_mm, y_mm, jz_mm, int_sum1);
int_sum1 = _mm_hadd_pd(int_sum1, int_sum1);
if(noise_generator==kNoiseGen_RangeCorrected)
{
/* details of range here:
Min, max: -1.05242, 0.988997
Mean: -0.0191481, Median: -0.535493, Std Dev: 0.256828
We want to change it to as close to [0,1] as possible.
*/
const __m128d r2 = _mm_set_sd(0.48985582);
const __m128d r1r2 = _mm_set_sd(1.05242*0.48985582);
int_sum1 = _mm_macc_sd(int_sum1, r2, r1r2);
}
else
{
int_sum1 = _mm_add_sd(int_sum1, _mm_set_sd(0.5));
}
int_sum1 = _mm_min_sd(one, int_sum1);
int_sum1 = _mm_max_sd(_mm_setzero_pd(), int_sum1);
_mm_store_sd(&sum, int_sum1);
return (sum);
}
__m128d test_mm_nmacc_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_nmacc_pd
// CHECK: [[NEG:%.+]] = fsub <2 x double> <double -0.000000e+00, double -0.000000e+00>, %{{.+}}
// CHECK: @llvm.x86.fma.vfmadd.pd(<2 x double> [[NEG]], <2 x double> %{{.+}}, <2 x double> %{{.+}})
return _mm_nmacc_pd(a, b, c);
}
