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/*
* Copyright (c) 2012, Michael Lehn * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1) Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2) 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. * 3) Neither the name of the FLENS development group 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 * OWNER 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. */ #ifndef FLENS_BLAS_CLOSURES_LEVEL2_MVSWITCH_TCC #define FLENS_BLAS_CLOSURES_LEVEL2_MVSWITCH_TCC 1 #include <flens/auxiliary/auxiliary.h> #include <flens/blas/closures/closures.h> #include <flens/blas/level1/level1.h> #include <flens/blas/level2/level2.h> #include <flens/blas/level3/level3.h> #include <flens/typedefs.h> #ifdef FLENS_DEBUG_CLOSURES # include <flens/blas/blaslogon.h> #else # include <flens/blas/blaslogoff.h> #endif namespace flens { namespace blas { // // This switch evaluates closures of the form // // y = beta*y + A*x // // If x is a closure then it gets evaluated and a temporary gets created to // store the result. For matrix A we distinguish between three cases: // case 1: A is no closure // case 2: A is a scaling closure (i.e. scale*A) // case 3: A is some other closure // // Entry point for mvSwitch // template <typename ALPHA, typename MA, typename VX, typename BETA, typename VY> typename RestrictTo<IsSame<MA, typename MA::Impl>::value && IsSame<VX, typename VX::Impl>::value && IsSame<VY, typename VY::Impl>::value, void>::Type mvSwitch(Transpose trans, const ALPHA &alpha, const MA &A, const VX &x, const BETA &beta, VY &y) { ASSERT(alpha==ALPHA(1) || alpha==ALPHA(-1)); // // If A is a closure then prune arbitrary many OpTrans/OpConj // typedef typename PruneConjTrans<MA>::Remainder RMA; trans = Transpose(trans^PruneConjTrans<MA>::trans); const RMA &_A = PruneConjTrans<MA>::remainder(A); // // If x is a closure it gets evaluated. In this case a temporary gets // created. Otherwise we only keep a reference // FLENS_BLASLOG_TMP_TRON; const typename Result<VX>::Type &_x = x; FLENS_BLASLOG_TMP_TROFF; // // Call mv implementation // mvCase(trans, alpha, _A, _x, beta, y); // // If a temporary was created and registered before we now unregister it // # ifdef FLENS_DEBUG_CLOSURES if (!IsSame<VX, typename Result<VX>::Type>::value) { FLENS_BLASLOG_TMP_REMOVE(_x, x); } # else const bool check = IsSame<VX, typename Result<VX>::Type>::value; if (!check) { std::cerr << "ERROR: Temporary required." << std::endl; } ASSERT(check); # endif } // // case 1: A is no closure // template <typename ALPHA, typename MA, typename VX, typename BETA, typename VY> typename RestrictTo<!IsClosure<MA>::value, void>::Type mvCase(Transpose trans, const ALPHA &alpha, const MA &A, const VX &x, const BETA &beta, VY &y) { mv(trans, alpha, A, x, beta, y); } // // case 2: A is closure of type scale*A // template <typename ALPHA, typename T, typename MA, typename VX, typename BETA, typename VY> void mvCase(Transpose trans, const ALPHA &alpha, const MatrixClosure<OpMult, ScalarValue<T>, MA> &scale_A, const VX &x, const BETA &beta, VY &y) { // // If A is a closure then prune arbitrary many OpTrans/OpConj // typedef typename PruneConjTrans<MA>::Remainder _MA; typedef typename Result<_MA>::Type RMA; Transpose _trans = Transpose(trans^PruneConjTrans<MA>::trans); // // If the remaining A is a closure it gets evaluated. In this case // a temporary gets created. Otherwise we only keep a reference // FLENS_BLASLOG_TMP_TRON; const _MA &_A = PruneConjTrans<MA>::remainder(scale_A.right()); const RMA &A = _A; FLENS_BLASLOG_TMP_TROFF; mv(_trans, alpha*scale_A.left().value(), A, x, beta, y); // // If a temporary was created and registered before we now unregister it // # ifdef FLENS_DEBUG_CLOSURES if (!IsSame<_MA, RMA>::value) { FLENS_BLASLOG_TMP_REMOVE(A, _A); } # else const bool check = IsSame<_MA, RMA>::value; if (!check) { std::cerr << "ERROR: Temporary required." << std::endl; } ASSERT(check); # endif } // // case 3: A is some other closure // template <typename ALPHA, typename Op, typename L, typename R, typename VX, typename BETA, typename VY> void mvCase(Transpose trans, const ALPHA &alpha, const MatrixClosure<Op, L, R> &A, const VX &x, const BETA &beta, VY &y) { typedef MatrixClosure<Op, L, R> MC; // // Create (most certainly) temporary for the result of A // FLENS_BLASLOG_TMP_TRON; typedef typename Result<MC>::Type MA; const MA &_A = A; FLENS_BLASLOG_TMP_TROFF; mv(trans, alpha, _A, x, beta, y); // // If a temporary was created and registered before we now unregister it // # ifdef FLENS_DEBUG_CLOSURES if (!IsSame<MC, MA>::value) { FLENS_BLASLOG_TMP_REMOVE(_A, A); } # else const bool check = IsSame<MC, MA>::value; if (!check) { std::cerr << "ERROR: Temporary required." << std::endl; } ASSERT(check); # endif } } } // namespace blas, flens #endif // FLENS_BLAS_CLOSURES_LEVEL2_MVSWITCH_TCC |