//-----------------------------------------------------------------
// SOA -> AOS
//
// pBlu: b0, b1, b2, b3, b4, ...
// pGrn: g0, g1, g2, g3, g4, ...
// pRed: r0, r1, r2, r3, r4, ...
// ->
// pBgr: b0,g0,r0, b1,g1,r1, b2,g2,r2, b3,g3,r3, b4,g4,r4, ...
//
void
soa2aos(float *pBlu, float *pGrn, float *pRed, float *pBgr, const size_t length)
{
__m128 *bgr = (__m128 *)pBgr;
//1回に24ユニット、8x+8y+8z、x,y,z=float
for (size_t i = 0; i < length; i += 24)
{
__m256 b = _mm256_load_ps(pBlu + (i / 3));
__m256 g = _mm256_load_ps(pGrn + (i / 3));
__m256 r = _mm256_load_ps(pRed + (i / 3));
__m256 bg = _mm256_shuffle_ps(b, g, _MM_SHUFFLE(2, 0, 2, 0));
__m256 gr = _mm256_shuffle_ps(g, r, _MM_SHUFFLE(3, 1, 3, 1));
__m256 rb = _mm256_shuffle_ps(r, b, _MM_SHUFFLE(3, 1, 2, 0));
__m256 r03 = _mm256_shuffle_ps(bg, rb, _MM_SHUFFLE(2, 0, 2, 0));
__m256 r14 = _mm256_shuffle_ps(gr, bg, _MM_SHUFFLE(3, 1, 2, 0));
__m256 r25 = _mm256_shuffle_ps(rb, gr, _MM_SHUFFLE(3, 1, 3, 1));
*bgr++ = _mm256_castps256_ps128(r03);
*bgr++ = _mm256_castps256_ps128(r14);
*bgr++ = _mm256_castps256_ps128(r25);
*bgr++ = _mm256_extractf128_ps(r03, 1);
*bgr++ = _mm256_extractf128_ps(r14, 1);
*bgr++ = _mm256_extractf128_ps(r25, 1);
}
}
static void
sfid_render_cache_rt_write_rep16_bgra_unorm8_xmajor(struct thread *t,
const struct sfid_render_cache_args *args)
{
const __m128 scale = _mm_set1_ps(255.0f);
const __m128 half = _mm_set1_ps(0.5f);
struct reg src[1];
memcpy(src, &t->grf[args->src], sizeof(src));
if (srgb_format(args->rt.format)) {
const __m256 inv_gamma = _mm256_set1_ps(1.0f / 2.4f);
src[0].reg = _ZGVdN8vv_powf(src[0].reg, inv_gamma);
/* Don't gamma correct alpha */
src[0].f[3] = t->grf[args->src].f[3];
}
__m128 bgra = _mm_shuffle_ps(_mm256_castps256_ps128(src[0].reg),
_mm256_castps256_ps128(src[0].reg),
SWIZZLE(2, 1, 0, 3));
bgra = _mm_mul_ps(bgra, scale);
bgra = _mm_add_ps(bgra, half);
__m128i bgra_i = _mm_cvtps_epi32(bgra);
bgra_i = _mm_packus_epi32(bgra_i, bgra_i);
bgra_i = _mm_packus_epi16(bgra_i, bgra_i);
/* Swizzle two middle mask pairs so that dword 0-3 and 4-7
* form linear owords of pixels. */
__m256i mask = _mm256_permute4x64_epi64(t->mask_q1, SWIZZLE(0, 2, 1, 3));
const int slice_y = args->rt.minimum_array_element * args->rt.qpitch;
const int x0 = t->grf[1].uw[4];
const int y0 = t->grf[1].uw[5] + slice_y;
const int cpp = 4;
void *base0 = xmajor_offset(args->rt.pixels, x0, y0, args->rt.stride, cpp);
_mm_maskstore_epi32(base0, _mm256_extractf128_si256(mask, 0), bgra_i);
_mm_maskstore_epi32(base0 + 512, _mm256_extractf128_si256(mask, 1), bgra_i);
const int x1 = t->grf[1].uw[8];
const int y1 = t->grf[1].uw[9] + slice_y;
void *base1 = xmajor_offset(args->rt.pixels, x1, y1, args->rt.stride, 4);
__m256i mask1 = _mm256_permute4x64_epi64(t->mask_q2, SWIZZLE(0, 2, 1, 3));
_mm_maskstore_epi32(base1, _mm256_extractf128_si256(mask1, 0), bgra_i);
_mm_maskstore_epi32(base1 + 512, _mm256_extractf128_si256(mask1, 1), bgra_i);
}
inline float DatabaseBuilder::Distance(PackedSample* x, PackedSample* y)
{
#ifdef AVX
//Black magic
//But it does produce the same results as the not AVX code
__m256 accumulator;
__m256 x_s = _mm256_load_ps(x->Features);
__m256 y_s = _mm256_load_ps(y->Features);
__m256 result = _mm256_sub_ps(x_s, y_s);
accumulator = _mm256_mul_ps(result, result);
x_s = _mm256_load_ps(&x->Features[8]);
y_s = _mm256_load_ps(&y->Features[8]);
result = _mm256_sub_ps(x_s, y_s);
result = _mm256_mul_ps(result, result);
accumulator = _mm256_add_ps(accumulator, result);
x_s = _mm256_load_ps(&x->Features[16]);
y_s = _mm256_load_ps(&y->Features[16]);
result = _mm256_sub_ps(x_s, y_s);
result = _mm256_mul_ps(result, result);
accumulator = _mm256_add_ps(accumulator, result);
x_s = _mm256_load_ps(&x->Features[24]);
y_s = _mm256_load_ps(&y->Features[24]);
result = _mm256_sub_ps(x_s, y_s);
result = _mm256_mul_ps(result, result);
accumulator = _mm256_add_ps(accumulator, result);
//We now have a vector of 8 floats
__m256 t1 = _mm256_hadd_ps(accumulator, accumulator);
__m256 t2 = _mm256_hadd_ps(t1, t1);
__m128 t3 = _mm256_extractf128_ps(t2, 1);
__m128 t4 = _mm_add_ss(_mm256_castps256_ps128(t2), t3);
//And now we don't
return std::sqrtf(_mm_cvtss_f32(t4));
#endif
#ifndef AVX
//Can be autovectorized
float accumulator[32];
float distance = 0;
for (int i = 0; i < 30; i++)
{
accumulator[i] = x->Features[i] - y->Features[i];
}
//If done properly this should be 4(8) instructions
for (int i = 0; i < 30; i++)
{
distance += accumulator[i] * accumulator[i];
}
return std::sqrtf(distance);
#endif
}
irreg_poly_area_func_sign(float, _avx) {
if (__builtin_expect(is_null(cords) || cords_len == 0, 0))
return 0;
__m256
values_0_3,
values_4_7,
values_8_11,
values_12_15,
values_16_19 = _mm256_load_ps((const float *)&cords[0][0]),
accum_sum = _mm256_setzero_ps();
float accum_sum_aux;
#define _float_cords_dot_prod(curr, next, index) \
_mm256_dp_ps( \
curr, \
_mm256_xor_ps( \
_mm256_shuffle_ps(curr, _mm256_permute2f128_ps(curr, next, 0b00100001), 0b00011011),\
_mm256_setr_ps(0, -0.0f, 0, -0.0f, 0, -0.0f, 0, -0.0f) \
), \
0b11110000 | (1 << (index)) \
)
unsigned long index;
for (index = 0; index < (cords_len - 16); index += 16) {
values_0_3 = values_16_19;
values_4_7 = _mm256_load_ps((const float *)&cords[index + 4]);
values_8_11 = _mm256_load_ps((const float *)&cords[index + 8]);
values_12_15 = _mm256_load_ps((const float *)&cords[index + 12]);
values_16_19 = _mm256_load_ps((const float *)&cords[index + 16]);
accum_sum = _mm256_add_ps(
accum_sum,
_mm256_add_ps(
_mm256_add_ps(
_float_cords_dot_prod(values_0_3, values_4_7, 0),
_float_cords_dot_prod(values_4_7, values_8_11, 1)
),
_mm256_add_ps(
_float_cords_dot_prod(values_8_11, values_12_15, 2),
_float_cords_dot_prod(values_12_15, values_16_19, 3)
)
)
);
}
accum_sum = _mm256_hadd_ps(accum_sum, _mm256_permute2f128_ps(accum_sum, accum_sum, 1)); // a0+a1, a2+a3, a4+a5, a6+a7, a4+a5, a6+a7, a0+a1, a2+a3
accum_sum = _mm256_hadd_ps(accum_sum, accum_sum); // a0+a1+a2+a3, a4+a5+a6+a7, ...
accum_sum = _mm256_hadd_ps(accum_sum, accum_sum); // a0+a1+a2+a3+a4+a5+a6+a7, ...
for (accum_sum_aux = _mm_cvtss_f32(_mm256_castps256_ps128(accum_sum)); index < (cords_len - 1); index++)
accum_sum_aux += _calc_diff_of_adj_prods(cords, index);
return accum_sum_aux;
// return scalar_half(scalar_abs(accum_sum_aux));
}
//Thanks stack overflow.
static inline float _mm256_reduce_add_ps(__m256 x) {
/* ( x3+x7, x2+x6, x1+x5, x0+x4 ) */
const int imm = 1;
const __m128 x128 = _mm_add_ps(_mm256_extractf128_ps(x, imm), _mm256_castps256_ps128(x));
/* ( -, -, x1+x3+x5+x7, x0+x2+x4+x6 ) */
const __m128 x64 = _mm_add_ps(x128, _mm_movehl_ps(x128, x128));
/* ( -, -, -, x0+x1+x2+x3+x4+x5+x6+x7 ) */
const __m128 x32 = _mm_add_ss(x64, _mm_shuffle_ps(x64, x64, 0x55));
/* Conversion to float is a no-op on x86-64 */
return _mm_cvtss_f32(x32);
}
/* http://stackoverflow.com/questions/13219146/how-to-sum-m256-horizontally */
static inline float horizontal_sum_avx2(__m256 x)
{
const __m128 hi_quad = _mm256_extractf128_ps(x, 1);
const __m128 lo_quad = _mm256_castps256_ps128(x);
const __m128 sum_quad = _mm_add_ps(lo_quad, hi_quad);
const __m128 lo_dual = sum_quad;
const __m128 hi_dual = _mm_movehl_ps(sum_quad, sum_quad);
const __m128 sum_dual = _mm_add_ps(lo_dual, hi_dual);
const __m128 lo = sum_dual;
const __m128 hi = _mm_shuffle_ps(sum_dual, sum_dual, 0x1);
const __m128 sum = _mm_add_ss(lo, hi);
return _mm_cvtss_f32(sum);
}
__m256 exp_256(
const __m256& x) {
//! Clip the value
__m256 y = _mm256_max_ps(_mm256_min_ps(x, _mm256_set1_ps(88.3762626647949f)),
_mm256_set1_ps(-88.3762626647949f));
//! Express exp(x) as exp(g + n * log(2))
__m256 fx = y * _mm256_set1_ps(1.44269504088896341) + _mm256_set1_ps(0.5f);
//! Floor
const __m256 tmp = _mm256_round_ps(fx, _MM_FROUND_TO_ZERO);
//! If greater, substract 1
const __m256 mask = _mm256_and_ps(_mm256_cmp_ps(tmp, fx, _CMP_GT_OS),
_mm256_set1_ps(1.f));
fx = tmp - mask;
y -= fx * _mm256_set1_ps(0.693359375 - 2.12194440e-4);
const __m256 z = y * y;
const __m256 t = (((((_mm256_set1_ps(1.9875691500E-4) * y +
_mm256_set1_ps(1.3981999507E-3)) * y +
_mm256_set1_ps(8.3334519073E-3)) * y +
_mm256_set1_ps(4.1665795894E-2)) * y +
_mm256_set1_ps(1.6666665459E-1)) * y +
_mm256_set1_ps(5.0000001201E-1)) * z + y +
_mm256_set1_ps(1.f);
//! Build 2^n (split it into two SSE array, since AVX2 equivalent functions
//! aren't available.
const __m128i emm0 = _mm_add_epi32(_mm_cvttps_epi32(_mm256_castps256_ps128(fx)), _mm_set1_epi32(0x7f));
const __m128i emm1 = _mm_add_epi32(_mm_cvttps_epi32(_mm256_extractf128_ps(fx, 1)), _mm_set1_epi32(0x7f));
fx = _mm256_castps128_ps256(_mm_castsi128_ps(_mm_slli_epi32(emm0, 23)));
fx = _mm256_insertf128_ps(fx, _mm_castsi128_ps(_mm_slli_epi32(emm1, 23)), 1);
//! Return the result
return t * fx;
}
float dot_product(const int N, const float *X, const int incX, const float *Y,
const int incY) {
__m256 accum = _mm256_setzero_ps();
for (int i = 0; i < N; i += 8, X += 8 * incX, Y += 8 * incY) {
__m256 xval = _mm256_load_ps(X);
__m256 yval = _mm256_load_ps(Y);
__m256 val = _mm256_mul_ps(xval, yval);
accum = _mm256_add_ps(val, accum);
}
// Reduce the values in accum into the smallest 32-bit subsection
// a0 a1 a2 a3 a4 a5 a6 a7 -> b0 b1 b2 b3
__m128 accum2 = _mm_add_ps(_mm256_castps256_ps128(accum),
_mm256_extractf128_ps(accum, 1));
// b0 b1 b2 b3 -> c0 c1 b2 b3
accum2 = _mm_add_ps(accum2,
_mm_castsi128_ps(_mm_srli_si128(_mm_castps_si128(accum2), 8)));
__m128 final_val = _mm_add_ss(
_mm_insert_ps(accum2, accum2, 0x4e), accum2);
// Add the high and low halves
return final_val[0];
}
/* http://stackoverflow.com/questions/13219146/how-to-sum-m256-horizontally */
inline float sum8(__m256 x)
{
// hiQuad = ( x7, x6, x5, x4 )
const __m128 hiQuad = _mm256_extractf128_ps(x, 1);
// loQuad = ( x3, x2, x1, x0 )
const __m128 loQuad = _mm256_castps256_ps128(x);
// sumQuad = ( x3 + x7, x2 + x6, x1 + x5, x0 + x4 )
const __m128 sumQuad = _mm_add_ps(loQuad, hiQuad);
// loDual = ( -, -, x1 + x5, x0 + x4 )
const __m128 loDual = sumQuad;
// hiDual = ( -, -, x3 + x7, x2 + x6 )
const __m128 hiDual = _mm_movehl_ps(sumQuad, sumQuad);
// sumDual = ( -, -, x1 + x3 + x5 + x7, x0 + x2 + x4 + x6 )
const __m128 sumDual = _mm_add_ps(loDual, hiDual);
// lo = ( -, -, -, x0 + x2 + x4 + x6 )
const __m128 lo = sumDual;
// hi = ( -, -, -, x1 + x3 + x5 + x7 )
const __m128 hi = _mm_shuffle_ps(sumDual, sumDual, 0x1);
// sum = ( -, -, -, x0 + x1 + x2 + x3 + x4 + x5 + x6 + x7 )
const __m128 sum = _mm_add_ss(lo, hi);
return _mm_cvtss_f32(sum);
}
void kernel_strmv_u_t_4_lib8(int kmax, float *A, int sda, float *x, float *y, int alg)
{
/* if(kmax<=0) */
/* return;*/
const int lda = 8;
/* const int bs = 8;*/
__builtin_prefetch( A + 0*lda );
__builtin_prefetch( A + 2*lda );
int
k;
__m256
zeros,
ax_temp,
a_00, a_01, a_02, a_03,
x_0,
y_0, y_1, y_2, y_3, y_4, y_5, y_6, y_7;
zeros = _mm256_setzero_ps();
y_0 = _mm256_setzero_ps();
y_1 = _mm256_setzero_ps();
y_2 = _mm256_setzero_ps();
y_3 = _mm256_setzero_ps();
y_4 = _mm256_setzero_ps();
y_5 = _mm256_setzero_ps();
y_6 = _mm256_setzero_ps();
y_7 = _mm256_setzero_ps();
k=0;
for(; k<kmax-7; k+=8)
{
x_0 = _mm256_loadu_ps( &x[0] );
__builtin_prefetch( A + sda*lda + 0*lda );
__builtin_prefetch( A + sda*lda + 2*lda );
a_00 = _mm256_load_ps( &A[0+lda*0] );
ax_temp = _mm256_mul_ps( a_00, x_0 );
y_0 = _mm256_add_ps( y_0, ax_temp );
a_01 = _mm256_load_ps( &A[0+lda*1] );
ax_temp = _mm256_mul_ps( a_01, x_0 );
y_1 = _mm256_add_ps( y_1, ax_temp );
a_02 = _mm256_load_ps( &A[0+lda*2] );
ax_temp = _mm256_mul_ps( a_02, x_0 );
y_2 = _mm256_add_ps( y_2, ax_temp );
a_03 = _mm256_load_ps( &A[0+lda*3] );
ax_temp = _mm256_mul_ps( a_03, x_0 );
y_3 = _mm256_add_ps( y_3, ax_temp );
A += sda*lda;
x += 8;
}
x_0 = _mm256_loadu_ps( &x[0] );
a_00 = _mm256_load_ps( &A[0+lda*0] );
a_00 = _mm256_blend_ps( zeros, a_00, 0x01 );
ax_temp = _mm256_mul_ps( a_00, x_0 );
y_0 = _mm256_add_ps( y_0, ax_temp );
a_01 = _mm256_load_ps( &A[0+lda*1] );
a_01 = _mm256_blend_ps( zeros, a_01, 0x03 );
ax_temp = _mm256_mul_ps( a_01, x_0 );
y_1 = _mm256_add_ps( y_1, ax_temp );
a_02 = _mm256_load_ps( &A[0+lda*2] );
a_02 = _mm256_blend_ps( zeros, a_02, 0x07 );
ax_temp = _mm256_mul_ps( a_02, x_0 );
y_2 = _mm256_add_ps( y_2, ax_temp );
a_03 = _mm256_load_ps( &A[0+lda*3] );
a_03 = _mm256_blend_ps( zeros, a_03, 0x0f );
ax_temp = _mm256_mul_ps( a_03, x_0 );
y_3 = _mm256_add_ps( y_3, ax_temp );
// reduction
__m128
z_0, z_1;
y_0 = _mm256_hadd_ps(y_0, y_1);
y_2 = _mm256_hadd_ps(y_2, y_3);
y_0 = _mm256_hadd_ps(y_0, y_2);
y_1 = _mm256_permute2f128_ps(y_0, y_0, 0x01);
z_0 = _mm256_castps256_ps128(y_0);
z_1 = _mm256_castps256_ps128(y_1);
z_1 = _mm_add_ps(z_0, z_1);
if(alg==0)
{
_mm_storeu_ps(&y[0], z_1);
}
else if(alg==1)
{
z_0 = _mm_loadu_ps( &y[0] );
z_0 = _mm_add_ps(z_0, z_1);
_mm_storeu_ps(&y[0], z_0);
}
else // alg==-1
{
z_0 = _mm_loadu_ps( &y[0] );
z_0 = _mm_sub_ps(z_0, z_1);
_mm_storeu_ps(&y[0], z_0);
}
}
/*!
* \brief Perform an horizontal sum of the given vector.
* \param in The input vector type
* \return the horizontal sum of the vector
*/
ETL_STATIC_INLINE(float) hadd(avx_simd_float in) {
const __m128 x128 = _mm_add_ps(_mm256_extractf128_ps(in.value, 1), _mm256_castps256_ps128(in.value));
const __m128 x64 = _mm_add_ps(x128, _mm_movehl_ps(x128, x128));
const __m128 x32 = _mm_add_ss(x64, _mm_shuffle_ps(x64, x64, 0x55));
return _mm_cvtss_f32(x32);
}
void kernel_ssymv_4_lib8(int kmax, int kna, float *A, int sda, float *x_n, float *y_n, float *x_t, float *y_t, int tri, int alg)
{
if(kmax<=0)
return;
const int lda = 8;
__builtin_prefetch( A + 0*lda );
__builtin_prefetch( A + 2*lda );
int
k, k_left, ii;
float
k_left_d;
const float mask_f[] = {7.5, 6.5, 5.5, 4.5, 3.5, 2.5, 1.5, 0.5};
float temp_space[8] = {};
__m256
mask,
zeros, temp,
a_00, a_01, a_02, a_03,
x_n_0, x_n_1, x_n_2, x_n_3, y_n_0,
x_t_0, y_t_0, y_t_1, y_t_2, y_t_3;
mask = _mm256_loadu_ps( mask_f );
zeros = _mm256_setzero_ps();
x_n_0 = _mm256_broadcast_ss( &x_n[0] );
x_n_1 = _mm256_broadcast_ss( &x_n[1] );
x_n_2 = _mm256_broadcast_ss( &x_n[2] );
x_n_3 = _mm256_broadcast_ss( &x_n[3] );
if(alg==-1) // TODO xor
{
x_n_0 = _mm256_sub_ps( zeros, x_n_0 );
x_n_1 = _mm256_sub_ps( zeros, x_n_1 );
x_n_2 = _mm256_sub_ps( zeros, x_n_2 );
x_n_3 = _mm256_sub_ps( zeros, x_n_3 );
}
y_t_0 = _mm256_setzero_ps();
y_t_1 = _mm256_setzero_ps();
y_t_2 = _mm256_setzero_ps();
y_t_3 = _mm256_setzero_ps();
k=0;
// corner
if(tri==1)
{
k_left = kna-k;
k_left_d = 8.0 - k_left;
/*printf("\nk_left = %d\n", k_left);*/
/* y_n_0 = _mm_load_ps( &y_n[0] );*/
/* y_n_0 = _mm_setzero_ps();*/
x_t_0 = _mm256_loadu_ps( &x_t[0] );
x_t_0 = _mm256_blendv_ps( x_t_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
/*_mm256_storeu_ps( temp_space, x_t_0 ); */
/*printf("\nx = %f %f %f %f %f %f %f %f \n", temp_space[0], temp_space[1], temp_space[2], temp_space[3], temp_space[4], temp_space[5], temp_space[6], temp_space[7] );*/
/*exit(1);*/
a_00 = _mm256_loadu_ps( &A[0+lda*0] );
a_00 = _mm256_blend_ps( a_00, zeros, 0x00 );
/* temp = _mm256_mul_ps( a_00, x_n_0 );*/
/* y_n_0 = _mm256_add_ps( y_n_0, temp );*/
y_n_0 = _mm256_mul_ps( a_00, x_n_0 );
a_00 = _mm256_blend_ps( a_00, zeros, 0x01 );
temp = _mm256_mul_ps( a_00, x_t_0 );
y_t_0 = _mm256_add_ps( y_t_0, temp );
a_01 = _mm256_loadu_ps( &A[0+lda*1] );
a_01 = _mm256_blend_ps( a_01, zeros, 0x01 );
temp = _mm256_mul_ps( a_01, x_n_1 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
a_01 = _mm256_blend_ps( a_01, zeros, 0x03 );
temp = _mm256_mul_ps( a_01, x_t_0 );
y_t_1 = _mm256_add_ps( y_t_1, temp );
a_02 = _mm256_loadu_ps( &A[0+lda*2] );
a_02 = _mm256_blend_ps( a_02, zeros, 0x03 );
temp = _mm256_mul_ps( a_02, x_n_2 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
a_02 = _mm256_blend_ps( a_02, zeros, 0x07 );
temp = _mm256_mul_ps( a_02, x_t_0 );
y_t_2 = _mm256_add_ps( y_t_2, temp );
a_03 = _mm256_loadu_ps( &A[0+lda*3] );
a_03 = _mm256_blend_ps( a_03, zeros, 0x07 );
temp = _mm256_mul_ps( a_03, x_n_3 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
a_03 = _mm256_blend_ps( a_03, zeros, 0x0f );
temp = _mm256_mul_ps( a_03, x_t_0 );
y_t_3 = _mm256_add_ps( y_t_3, temp );
/*_mm256_storeu_ps( temp_space, y_n_0 ); */
/*printf("\ny = %f %f %f %f %f %f %f %f \n", temp_space[0], temp_space[1], temp_space[2], temp_space[3], temp_space[4], temp_space[5], temp_space[6], temp_space[7] );*/
y_n_0 = _mm256_blendv_ps( y_n_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
/*_mm256_storeu_ps( temp_space, y_n_0 ); */
/*printf("\ny = %f %f %f %f %f %f %f %f \n", temp_space[0], temp_space[1], temp_space[2], temp_space[3], temp_space[4], temp_space[5], temp_space[6], temp_space[7] );*/
x_t_0 = _mm256_loadu_ps( &y_n[0] );
y_n_0 = _mm256_add_ps( y_n_0, x_t_0 );
_mm256_storeu_ps( &y_n[0], y_n_0 );
A += k_left;
y_n += k_left;
x_t += k_left;
k += k_left;
}
if(k<kna) // it can be only k_left = {1, 2, 3, 4, 5, 6, 7}
/* for(; k<kna; k++)*/
{
k_left = kna-k;
k_left_d = 8.0 - k_left;
/*printf("\nk_left = %d\n", k_left);*/
/* y_n_0 = _mm_load_ps( &y_n[0] );*/
/* y_n_0 = _mm_setzero_ps();*/
x_t_0 = _mm256_loadu_ps( &x_t[0] );
x_t_0 = _mm256_blendv_ps( x_t_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
/*_mm256_storeu_ps( temp_space, x_t_0 ); */
/*printf("\nx = %f %f %f %f %f %f %f %f \n", temp_space[0], temp_space[1], temp_space[2], temp_space[3], temp_space[4], temp_space[5], temp_space[6], temp_space[7] );*/
a_00 = _mm256_loadu_ps( &A[0+lda*0] );
a_01 = _mm256_loadu_ps( &A[0+lda*1] );
a_02 = _mm256_loadu_ps( &A[0+lda*2] );
a_03 = _mm256_loadu_ps( &A[0+lda*3] );
/* temp = _mm256_mul_ps( a_00, x_n_0 );*/
/* y_n_0 = _mm256_add_ps( y_n_0, temp );*/
y_n_0 = _mm256_mul_ps( a_00, x_n_0 );
temp = _mm256_mul_ps( a_00, x_t_0 );
y_t_0 = _mm256_add_ps( y_t_0, temp );
temp = _mm256_mul_ps( a_01, x_n_1 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_01, x_t_0 );
y_t_1 = _mm256_add_ps( y_t_1, temp );
temp = _mm256_mul_ps( a_02, x_n_2 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_02, x_t_0 );
y_t_2 = _mm256_add_ps( y_t_2, temp );
temp = _mm256_mul_ps( a_03, x_n_3 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_03, x_t_0 );
y_t_3 = _mm256_add_ps( y_t_3, temp );
y_n_0 = _mm256_blendv_ps( y_n_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
x_t_0 = _mm256_loadu_ps( &y_n[0] );
y_n_0 = _mm256_add_ps( y_n_0, x_t_0 );
_mm256_storeu_ps( &y_n[0], y_n_0 );
/* _mm256_maskstore_ps( &y_n[0], (__m256i) _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ), y_n_0 );*/
/* _mm256_storeu_ps( temp_space, y_n_0 );*/
/* for(ii=0; ii<k_left; ii++)*/
/* y_n[ii] = temp_space[ii];*/
/*printf("\nk_left = %d\n", k_left);*/
/*exit(1);*/
A += k_left;
y_n += k_left;
x_t += k_left;
k += k_left;
}
if(kna>0 || tri==1)
{
A += (sda-1)*lda;
}
for(; k<kmax-7; k+=8)
{
__builtin_prefetch( A + sda*lda + 0*lda );
__builtin_prefetch( A + sda*lda + 2*lda );
y_n_0 = _mm256_loadu_ps( &y_n[0] );
x_t_0 = _mm256_loadu_ps( &x_t[0] );
a_00 = _mm256_load_ps( &A[0+lda*0] );
temp = _mm256_mul_ps( a_00, x_n_0 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_00, x_t_0 );
y_t_0 = _mm256_add_ps( y_t_0, temp );
a_01 = _mm256_load_ps( &A[0+lda*1] );
temp = _mm256_mul_ps( a_01, x_n_1 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_01, x_t_0 );
y_t_1 = _mm256_add_ps( y_t_1, temp );
a_02 = _mm256_load_ps( &A[0+lda*2] );
temp = _mm256_mul_ps( a_02, x_n_2 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_02, x_t_0 );
y_t_2 = _mm256_add_ps( y_t_2, temp );
a_03 = _mm256_load_ps( &A[0+lda*3] );
temp = _mm256_mul_ps( a_03, x_n_3 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_03, x_t_0 );
y_t_3 = _mm256_add_ps( y_t_3, temp );
_mm256_storeu_ps( &y_n[0], y_n_0 );
A += sda*lda;
y_n += 8;
x_t += 8;
}
if(k<kmax) // it can be only k_left = {1, 2, 3, 4, 5, 6, 7}
{
k_left = kmax-k;
k_left_d = 8.0 - k_left;
/* y_n_0 = _mm_load_ps( &y_n[0] );*/
/* y_n_0 = _mm_setzero_ps();*/
x_t_0 = _mm256_loadu_ps( &x_t[0] );
x_t_0 = _mm256_blendv_ps( x_t_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
/*printf("\nk_left2 = %d\n", k_left, kmax, k);*/
a_00 = _mm256_load_ps( &A[0+lda*0] );
/*printf("\nk_left2 = %d\n", k_left);*/
a_01 = _mm256_load_ps( &A[0+lda*1] );
a_02 = _mm256_load_ps( &A[0+lda*2] );
a_03 = _mm256_load_ps( &A[0+lda*3] );
/* temp = _mm256_mul_ps( a_00, x_n_0 );*/
/* y_n_0 = _mm256_add_ps( y_n_0, temp );*/
y_n_0 = _mm256_mul_ps( a_00, x_n_0 );
temp = _mm256_mul_ps( a_00, x_t_0 );
y_t_0 = _mm256_add_ps( y_t_0, temp );
temp = _mm256_mul_ps( a_01, x_n_1 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_01, x_t_0 );
y_t_1 = _mm256_add_ps( y_t_1, temp );
temp = _mm256_mul_ps( a_02, x_n_2 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_02, x_t_0 );
y_t_2 = _mm256_add_ps( y_t_2, temp );
temp = _mm256_mul_ps( a_03, x_n_3 );
y_n_0 = _mm256_add_ps( y_n_0, temp );
temp = _mm256_mul_ps( a_03, x_t_0 );
y_t_3 = _mm256_add_ps( y_t_3, temp );
y_n_0 = _mm256_blendv_ps( y_n_0, zeros, _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ) );
x_t_0 = _mm256_loadu_ps( &y_n[0] );
y_n_0 = _mm256_add_ps( y_n_0, x_t_0 );
_mm256_storeu_ps( &y_n[0], y_n_0 );
/* _mm256_maskstore_ps( &y_n[0], (__m256i) _mm256_sub_ps( mask, _mm256_broadcast_ss( &k_left_d) ), y_n_0 );*/
/* _mm256_storeu_ps( temp_space, y_n_0 );*/
/* for(ii=0; ii<k_left; ii++)*/
/* y_n[ii] = temp_space[ii];*/
/* A += 1;*/
/* y_n += 1;*/
/* x_t += 1;*/
}
// reduction
__m128
z_0, z_1;
y_t_0 = _mm256_hadd_ps(y_t_0, y_t_1);
y_t_2 = _mm256_hadd_ps(y_t_2, y_t_3);
y_t_0 = _mm256_hadd_ps(y_t_0, y_t_2);
y_t_1 = _mm256_permute2f128_ps(y_t_0, y_t_0, 0x01);
z_0 = _mm256_castps256_ps128(y_t_0);
z_1 = _mm256_castps256_ps128(y_t_1);
z_1 = _mm_add_ps(z_0, z_1);
if(alg==1)
{
z_0 = _mm_loadu_ps( &y_t[0] );
z_0 = _mm_add_ps(z_0, z_1);
_mm_storeu_ps( &y_t[0], z_0 );
}
else // alg==-1
{
z_0 = _mm_loadu_ps( &y_t[0] );
z_0 = _mm_sub_ps(z_0, z_1);
_mm_storeu_ps( &y_t[0], z_0 );
}
}
void neuralNet::feedForward_layer(layerIterator_t nLayer)
{
constFloatIterator_t pActivations, cWeight, endWeight;
__m256 vTotal, vSub0, vSub1;
__m256 *vWeight, *vAct, *vEndWeight;
// summate each neuron's contribution
for (neuronIterator_t cNeuron = nLayer->begin(), end = nLayer->end();
cNeuron != end;
++cNeuron)
{
// foreach [previous neuron, current weight], up to endWeight
pActivations = activations.begin() + (nLayer - 1)->front().iNeuronIndex;
cWeight = cNeuron->weightsBegin(*this);
endWeight = cNeuron->weightsEnd(*this);
// (first 15 neurons) (TODO: redesign preamble and remove assertions for multiple of 16 size widths in neuralNet.h!)
// summate all neurons of previous layer: (remaining batches of 8 neurons)
vWeight = (__m256*)&cWeight[0];
vAct = (__m256*)&pActivations[0];
vEndWeight = (__m256*)&endWeight[0];
// initialize the activation of this neuron to its bias weight. The bias weight's neuron is always on:
vTotal = _mm256_set_ps(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, *endWeight); // can this be made with an aligned load?
do // Take advantage of SIMD instructions by doing 16 multiplies per iteration
{
/*
* each neuron's contribution is:
* input[j] += weight[i,j] * activation[i]
*/
// multiply:
vSub0 = _mm256_mul_ps(vWeight[0], vAct[0]);
vSub1 = _mm256_mul_ps(vWeight[1], vAct[1]);
// prefetch next values: (these don't appear to help, are the networks too small for this to matter?)
//_mm_prefetch((char*)(vWeight0+4), _MM_HINT_T0);
//_mm_prefetch((char*)(vAct0+4), _MM_HINT_T0);
// add to accumulator:
vTotal = _mm256_add_ps(vTotal, vSub0);
vTotal = _mm256_add_ps(vTotal, vSub1);
// increment pointers:
vWeight += 2;
vAct += 2;
}
while (vWeight != vEndWeight);
//finalize: (combine all 4 accumulators)
{
vTotal = _mm256_hadd_ps(vTotal, vTotal);
vTotal = _mm256_hadd_ps(vTotal, vTotal);
__m128 vUpperTotal = _mm256_extractf128_ps(vTotal, 1);
vUpperTotal = _mm_add_ps(vUpperTotal, _mm256_castps256_ps128(vTotal));
// store the lowest float into cInput:
_mm_store_ss(&activations[cNeuron->iNeuronIndex], vUpperTotal);
}
}
// activate all neurons in this layer:
float* cActivation = (&activations.front() + nLayer->front().iNeuronIndex);
float* lActivation = (&activations.front() + nLayer->back().iNeuronIndex + 1);
float* lVectorActivation = lActivation - ((lActivation - cActivation)&(ALIGN_SIZE-1)); // equivalent to mod ALIGN_SIZE
// aligned activations:
while (cActivation != lVectorActivation)
{
activation_approx_avx(cActivation, cActivation);
cActivation += ALIGN_SIZE;
};
// postscript: (unaligned activations):
{
size_t dActivation = (lActivation - cActivation);
switch(dActivation)
{
case 7:
activation_approx(cActivation+6,cActivation+6);
case 6:
activation_approx(cActivation+5,cActivation+5);
case 5:
activation_approx(cActivation+4,cActivation+4);
case 4:
activation_approx_sse(cActivation+0,cActivation+0);
break;
case 3:
activation_approx(cActivation+2, cActivation+2);
case 2:
activation_approx(cActivation+1, cActivation+1);
case 1:
activation_approx(cActivation+0, cActivation+0);
case 0:
break;
}
}
}; // endOf feedForward_layer