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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <arraysumfunctor.hxx>
#include <tools/simdsupport.hxx>
namespace sc
{
double ArraySumFunctor::executeSSE2(size_t& i, const double* pCurrent) const
{
#if defined(LO_SSE2_AVAILABLE)
double fSum = 0.0;
size_t nRealSize = mnSize - i;
size_t nUnrolledSize = nRealSize - (nRealSize % 8);
if (nUnrolledSize > 0)
{
__m128d sum1 = _mm_setzero_pd();
__m128d sum2 = _mm_setzero_pd();
__m128d sum3 = _mm_setzero_pd();
__m128d sum4 = _mm_setzero_pd();
for (; i < nUnrolledSize; i += 8)
{
__m128d load1 = _mm_load_pd(pCurrent);
sum1 = _mm_add_pd(sum1, load1);
pCurrent += 2;
__m128d load2 = _mm_load_pd(pCurrent);
sum2 = _mm_add_pd(sum2, load2);
pCurrent += 2;
__m128d load3 = _mm_load_pd(pCurrent);
sum3 = _mm_add_pd(sum3, load3);
pCurrent += 2;
__m128d load4 = _mm_load_pd(pCurrent);
sum4 = _mm_add_pd(sum4, load4);
pCurrent += 2;
}
sum1 = _mm_add_pd(_mm_add_pd(sum1, sum2), _mm_add_pd(sum3, sum4));
double temp;
_mm_storel_pd(&temp, sum1);
fSum += temp;
_mm_storeh_pd(&temp, sum1);
fSum += temp;
}
return fSum;
#else
(void)i;
(void)pCurrent;
return 0.0;
#endif
}
}
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