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/*
* Copyright (C) 2014, The University of Texas at Austin
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of The University of Texas at Austin nor the names
* of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* Copyright (C) 2014-2015, Michael Lehn
*
* ulmBLAS adopted general ideas from BLIS. Using micro kernels from BLIS
* only requires minor modifications,
*
*/
#ifndef ULMBLAS_IMPL_LEVEL1EXTENSIONS_KERNEL_SSE_DOTXAXPYF_TCC
#define ULMBLAS_IMPL_LEVEL1EXTENSIONS_KERNEL_SSE_DOTXAXPYF_TCC 1
#include <immintrin.h>
#include <ulmblas/impl/auxiliary/isaligned.h>
#include <ulmblas/impl/config/fusefactor.h>
#include <ulmblas/impl/level1extensions/kernel/sse/dotxaxpyf.h>
#include <ulmblas/impl/level1extensions/kernel/ref/dotxaxpyf.h>
namespace ulmBLAS { namespace sse {
//
// ----------------
// Double Precision
// ----------------
//
template <typename IndexType>
typename std::enable_if<std::is_integral<IndexType>::value
&& FuseFactor<double>::dotuxf==2,
void>::type
dotxaxpyf(IndexType n,
bool conjX,
bool conjXt,
bool conjY,
const double &alpha,
const double *a,
IndexType incA,
const double *X,
IndexType incRowX,
IndexType incColX,
const double *y,
IndexType incY,
double *z,
IndexType incZ,
double *rho,
IndexType incRho)
{
const IndexType bf = FuseFactor<double>::dotxaxpyf;
for (IndexType l=0; l<bf; ++l) {
rho[l*incRho] = 0;
}
if (n<=0) {
return;
}
if (incRowX!=1 || incY!=1 || incZ!=1 || conjX || conjXt || conjY) {
ref::dotxaxpyf(n, conjX, conjXt, conjY, alpha, a, incA,
X, incRowX, incColX, y, incY,
z, incZ, rho, incRho);
return;
}
const double alpha0 = alpha*a[0*incA];
const double alpha1 = alpha*a[1*incA];
const double *x0 = &X[0*incColX];
const double *x1 = &X[1*incColX];
double &rho0 = rho[0*incRho];
double &rho1 = rho[1*incRho];
bool x0Aligned = isAligned(x0, 16);
bool x1Aligned = isAligned(x1, 16);
bool yAligned = isAligned(y, 16);
bool zAligned = isAligned(z, 16);
rho0 = rho1 = 0;
if (!x0Aligned && !x1Aligned && !yAligned && !zAligned) {
z[0] += alpha0*x0[0] + alpha1*x1[0];
rho0 += x0[0]*y[0];
rho1 += x1[0]*y[0];
++x0;
++x1;
++y;
++z;
--n;
x0Aligned = x1Aligned = yAligned = zAligned = true;
}
if (x0Aligned && x1Aligned && yAligned && zAligned) {
IndexType nb = n / 4;
IndexType nl = n % 4;
__m128d rho00, rho11;
__m128d alpha0_11, alpha1_11;
__m128d z12, z34;
__m128d y12, y34;
__m128d tmp0, tmp1;
__m128d x0_12, x0_34;
__m128d x1_12, x1_34;
alpha0_11 = _mm_loaddup_pd(&alpha0);
alpha1_11 = _mm_loaddup_pd(&alpha1);
rho00 = _mm_setzero_pd();
rho11 = _mm_setzero_pd();
double rho00_[2], rho11_[2];
for (IndexType i=0; i<nb; ++i) {
x0_12 = _mm_load_pd(x0);
x0_34 = _mm_load_pd(x0+2);
x1_12 = _mm_load_pd(x1);
x1_34 = _mm_load_pd(x1+2);
y12 = _mm_load_pd(y);
y34 = _mm_load_pd(y+2);
z12 = _mm_load_pd(z);
z34 = _mm_load_pd(z+2);
tmp0 = y12;
tmp1 = y12;
tmp0 = tmp0 * x0_12;
tmp1 = tmp1 * x1_12;
x0_12 = alpha0_11 * x0_12;
x1_12 = alpha1_11 * x1_12;
z12 = z12 + x0_12;
z12 = z12 + x1_12;
rho00 = rho00 + tmp0;
rho11 = rho11 + tmp1;
_mm_store_pd(z, z12);
tmp0 = y34;
tmp1 = y34;
tmp0 = tmp0 * x0_34;
tmp1 = tmp1 * x1_34;
x0_34 = alpha0_11 * x0_34;
x1_34 = alpha1_11 * x1_34;
z34 = z34 + x0_34;
z34 = z34 + x1_34;
rho00 = rho00 + tmp0;
rho11 = rho11 + tmp1;
_mm_store_pd(z+2, z34);
x0 += 4;
x1 += 4;
y += 4;
z += 4;
}
_mm_store_pd(rho00_, rho00);
_mm_store_pd(rho11_, rho11);
rho0 += rho00_[0] + rho00_[1];
rho1 += rho11_[0] + rho11_[1];
for (IndexType i=0; i<nl; ++i) {
z[i] += alpha0*x0[i] + alpha1*x1[i];
rho0 += x0[i]*y[i];
rho1 += x1[i]*y[i];
}
} else {
ref::dotxaxpyf(n, conjX, conjXt, conjY, alpha, a, incA,
X, incRowX, incColX, y, incY,
z, incZ, rho, incRho);
}
}
} } // namespace sse, ulmBLAS
#endif // ULMBLAS_IMPL_LEVEL1EXTENSIONS_KERNEL_SSE_DOTXAXPYF_TCC 1
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