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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. */ /* Based on * SUBROUTINE ZUNMLQ( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC, $ WORK, LWORK, INFO ) * * -- LAPACK routine (version 3.3.1) -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * -- April 2011 -- */ #ifndef FLENS_LAPACK_IMPL_UNMLQ_TCC #define FLENS_LAPACK_IMPL_UNMLQ_TCC 1 #include <flens/blas/blas.h> #include <flens/lapack/lapack.h> namespace flens { namespace lapack { //== generic lapack implementation ============================================= //== interface for native lapack =============================================== #ifdef USE_CXXLAPACK namespace external { //-- unmlq_wsq [worksize query] ------------------------------------------------ template <typename MA, typename MC> typename GeMatrix<MC>::IndexType unmlq_wsq_impl(Side side, Transpose trans, GeMatrix<MA> &A, GeMatrix<MC> &C) { typedef typename GeMatrix<MC>::IndexType IndexType; typedef typename GeMatrix<MC>::ElementType T; T WORK, DUMMY; const IndexType LWORK = -1; cxxlapack::unmlq<IndexType>(getF77Char(side), getF77Char(trans), C.numRows(), C.numCols(), A.numRows(), A.data(), A.leadingDimension(), &DUMMY, C.data(), C.leadingDimension(), &WORK, LWORK); return cxxblas::real(WORK); } //-- unmlq --------------------------------------------------------------------- template <typename MA, typename VTAU, typename MC, typename VWORK> void unmlq_impl(Side side, Transpose trans, GeMatrix<MA> &A, const DenseVector<VTAU> &tau, GeMatrix<MC> &C, DenseVector<VWORK> &work) { typedef typename GeMatrix<MC>::IndexType IndexType; if (work.length()==0) { work.resize(unmlq_wsq_impl(side, trans, A, C)); } cxxlapack::unmlq<IndexType>(getF77Char(side), getF77Char(trans), C.numRows(), C.numCols(), A.numRows(), A.data(), A.leadingDimension(), tau.data(), C.data(), C.leadingDimension(), work.data(), work.length()); } } // namespace external #endif // USE_CXXLAPACK //== public interface ========================================================== //-- unmlq --------------------------------------------------------------------- #ifdef USE_CXXLAPACK template <typename MA, typename VTAU, typename MC, typename VWORK> typename RestrictTo<IsComplexGeMatrix<MA>::value && IsComplexDenseVector<VTAU>::value && IsComplexGeMatrix<MC>::value && IsComplexDenseVector<VWORK>::value, void>::Type unmlq(Side side, Transpose trans, MA &&A, const VTAU &tau, MC &&C, VWORK &&work) { // // Remove references from rvalue types // typedef typename RemoveRef<MA>::Type MatrixA; typedef typename RemoveRef<MC>::Type MatrixC; typedef typename MatrixC::IndexType IndexType; typedef typename RemoveRef<VWORK>::Type VectorWork; // // Test the input parameters // # ifndef NDEBUG const IndexType m = C.numRows(); const IndexType n = C.numCols(); const IndexType k = A.numRows(); ASSERT(tau.length()==k); if (side==Left) { ASSERT(A.numCols()==m); } else { ASSERT(A.numCols()==n); } if (work.length()>0) { if (side==Left) { ASSERT(work.length()>=n); } else { ASSERT(work.length()>=m); } } # endif // // Call implementation // external::unmlq_impl(side, trans, A, tau, C, work); } // // Variant with temporary workspace // template <typename MA, typename VTAU, typename MC> typename RestrictTo<IsComplexGeMatrix<MA>::value && IsComplexDenseVector<VTAU>::value && IsComplexGeMatrix<MC>::value, void>::Type unmlq(Side side, Transpose trans, MA &&A, const VTAU &tau, MC &&C) { typedef typename RemoveRef<MA>::Type::Vector WorkVector; WorkVector work; unmlq(side, trans, A, tau, C, work); } // // Variant for convenience: c is vector // template <typename MA, typename VTAU, typename VC, typename VWORK> typename RestrictTo<IsComplexGeMatrix<MA>::value && IsComplexDenseVector<VTAU>::value && IsComplexDenseVector<VC>::value && IsComplexDenseVector<VWORK>::value, void>::Type unmlq(Side side, Transpose trans, MA &&A, const VTAU &tau, VC &&c, VWORK &&work) { // // Remove references from rvalue types // typedef typename RemoveRef<MA>::Type MatrixA; typedef typename RemoveRef<VC>::Type VectorC; typedef typename VectorC::ElementType ElementType; typedef typename VectorC::IndexType IndexType; const IndexType n = c.length(); const StorageOrder order = MatrixA::Engine::order; GeMatrix<FullStorageView<ElementType, order> > C(n, 1, c, n); unmlq(side, trans, A, tau, C, work); } // // Variant for convenience: c is vector and workspace gets created // temporarily. // template <typename MA, typename VTAU, typename VC> typename RestrictTo<IsComplexGeMatrix<MA>::value && IsComplexDenseVector<VTAU>::value && IsComplexDenseVector<VC>::value, void>::Type unmlq(Side side, Transpose trans, MA &&A, const VTAU &tau, VC &&c) { // // Remove references from rvalue types // typedef typename RemoveRef<MA>::Type MatrixA; typedef typename RemoveRef<VC>::Type VectorC; typedef typename VectorC::ElementType ElementType; typedef typename VectorC::IndexType IndexType; const IndexType n = c.length(); const StorageOrder order = MatrixA::Engine::order; GeMatrix<FullStorageView<ElementType, order> > C(n, 1, c, n); unmlq(side, trans, A, tau, C); } //-- unmlq_wsq [worksize query] ------------------------------------------------ template <typename MA, typename MC> typename RestrictTo<IsRealGeMatrix<MA>::value && IsRealGeMatrix<MC>::value, typename RemoveRef<MC>::Type::IndexType>::Type unmlq_wsq(Side side, Transpose trans, MA &&A, MC &&C) { typedef typename RemoveRef<MC>::Type MatrixC; typedef typename MatrixC::IndexType IndexType; // // Test the input parameters // # ifndef NDEBUG const IndexType m = C.numRows(); const IndexType n = C.numCols(); const IndexType k = A.numRows(); if (side==Left) { ASSERT(A.numCols()==m); } else { ASSERT(A.numCols()==n); } # endif // // Call implementation // const IndexType info = external::unmlq_wsq_impl(side, trans, A, C); return info; } #endif // USE_CXXLAPACK } } // namespace lapack, flens #endif // FLENS_LAPACK_IMPL_UNMLQ_TCC |