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/*
* Copyright (c) 2011, 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 DORMHR( SIDE, TRANS, M, N, ILO, IHI, A, LDA, TAU, C, $ LDC, WORK, LWORK, INFO ) * * -- LAPACK routine (version 3.2) -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * November 2006 */ #ifndef FLENS_LAPACK_IMPL_ORMHR_TCC #define FLENS_LAPACK_IMPL_ORMHR_TCC 1 #include <flens/blas/blas.h> #include <flens/lapack/lapack.h> namespace flens { namespace lapack { //== generic lapack implementation ============================================= namespace generic { template <typename IndexType, typename MC> IndexType ormhr_wsq_impl(Side side, Transpose trans, IndexType iLo, IndexType iHi, const GeMatrix<MC> &C) { using std::max; typedef typename GeMatrix<MC>::ElementType T; const IndexType m = C.numRows(); const IndexType n = C.numCols(); const IndexType nh = iHi - iLo; // // nw is the minimum dimension of WORK // const IndexType nw = (side==Left) ? n : m; // TODO: implement a better way for setting up the opt string char opt[3]; opt[0] = getF77Char(side); opt[1] = getF77Char(trans); opt[2] = 0; IndexType nb; if (side==Left) { nb = ilaenv<T>(1, "ORMQR", opt, nh, n, nh); } else { nb = ilaenv<T>(1, "ORMQR", opt, m, nh, nh); } return max(IndexType(1), nw)*nb; } template <typename IndexType, typename MA, typename VTAU, typename MC, typename VWORK> void ormhr_impl(Side side, Transpose trans, IndexType iLo, IndexType iHi, GeMatrix<MA> &A, const DenseVector<VTAU> &tau, GeMatrix<MC> &C, DenseVector<VWORK> &work) { using std::max; typedef typename GeMatrix<MC>::ElementType T; const Underscore<IndexType> _; const IndexType m = C.numRows(); const IndexType n = C.numCols(); const IndexType nh = iHi - iLo; // // nw is the minimum dimension of WORK // const IndexType nw = (side==Left) ? n : m; // TODO: implement a better way for setting up the opt string char opt[3]; opt[0] = getF77Char(side); opt[1] = getF77Char(trans); opt[2] = 0; IndexType nb; if (side==Left) { nb = ilaenv<T>(1, "ORMQR", opt, nh, n, nh); } else { nb = ilaenv<T>(1, "ORMQR", opt, m, nh, nh); } IndexType lWorkOpt = max(IndexType(1), nw)*nb; // // Apply worksize query // if (work.length()==0) { work.resize(lWorkOpt); } // // Quick return if possible // if ((m==0) || (n==0) || (nh==0)) { work(1) = 1; return; } const auto _tau = tau(_(iLo,iHi-1)); auto _A = A(_(iLo+1,iHi),_(iLo,iHi-1)); if (side==Left) { auto _C = C(_(iLo+1,iHi),_); ormqr(Left, trans, _A, _tau, _C, work); } else { auto _C = C(_,_(iLo+1,iHi)); ormqr(Right, trans, _A, _tau, _C, work); } work(1) = lWorkOpt; } } // namespace generic //== interface for native lapack =============================================== #ifdef USE_CXXLAPACK namespace external { template <typename IndexType, typename MC> IndexType ormhr_wsq_impl(Side side, Transpose trans, IndexType iLo, IndexType iHi, const GeMatrix<MC> &C) { using std::max; typedef typename GeMatrix<MC>::ElementType ElementType; IndexType m = C.numRows(); IndexType n = C.numCols(); const IndexType LDA = (side==Left) ? max(IndexType(1), m) : max(IndexType(1), n); ElementType WORK, DUMMY; const IndexType LWORK = -1; cxxlapack::ormhr<IndexType>(getF77Char(side), getF77Char(trans), C.numRows(), C.numCols(), iLo, iHi, &DUMMY, LDA, &DUMMY, &DUMMY, C.leadingDimension(), &WORK, LWORK); return WORK; } template <typename IndexType, typename MA, typename VTAU, typename MC, typename VWORK> void ormhr_impl(Side side, Transpose trans, IndexType iLo, IndexType iHi, GeMatrix<MA> &A, const DenseVector<VTAU> &tau, GeMatrix<MC> &C, DenseVector<VWORK> &work) { cxxlapack::ormhr<IndexType>(getF77Char(side), getF77Char(trans), C.numRows(), C.numCols(), iLo, iHi, A.data(), A.leadingDimension(), tau.data(), C.data(), C.leadingDimension(), work.data(), work.length()); } } // namespace external #endif // USE_CXXLAPACK //== public interface ========================================================== template <typename IndexType, typename MC> IndexType ormhr_wsq(Side side, Transpose trans, IndexType iLo, IndexType iHi, const GeMatrix<MC> &C) { LAPACK_DEBUG_OUT("ormhr_wsq"); // // Test the input parameters // # ifndef NDEBUG const IndexType m = C.numRows(); const IndexType n = C.numCols(); if (side==Left) { if (m==0) { ASSERT(iLo==1); ASSERT(iHi==0); } else { ASSERT(1<=iLo); ASSERT(iLo<=iHi); ASSERT(iHi<=m); } } if (side==Right) { if (n==0) { ASSERT(iLo==1); ASSERT(iHi==0); } else { ASSERT(1<=iLo); ASSERT(iLo<=iHi); ASSERT(iHi<=n); } } # endif // // Call implementation // IndexType ws = LAPACK_SELECT::ormhr_wsq_impl(side, trans, iLo, iHi, C); // // Compare results // # ifdef CHECK_CXXLAPACK IndexType _ws = external::ormhr_wsq_impl(side, trans, iLo, iHi, C); if (ws!=_ws) { std::cerr << "CXXLAPACK: ws = " << ws << std::endl; std::cerr << "F77LAPACK: _ws = " << _ws << std::endl; ASSERT(0); } # endif return ws; } template <typename IndexType, typename MA, typename VTAU, typename MC, typename VWORK> void ormhr(Side side, Transpose trans, IndexType iLo, IndexType iHi, GeMatrix<MA> &A, const DenseVector<VTAU> &tau, GeMatrix<MC> &C, DenseVector<VWORK> &work) { LAPACK_DEBUG_OUT("ormhr"); using std::max; // // Test the input parameters // # ifndef NDEBUG const IndexType m = C.numRows(); const IndexType n = C.numCols(); ASSERT(A.firstRow()==1); ASSERT(A.firstCol()==1); ASSERT(tau.firstIndex()==1); if (side==Left) { if (m==0) { ASSERT(iLo==1); ASSERT(iHi==0); } else { ASSERT(1<=iLo); ASSERT(iLo<=iHi); ASSERT(iHi<=m); } } if (side==Right) { if (n==0) { ASSERT(iLo==1); ASSERT(iHi==0); } else { ASSERT(1<=iLo); ASSERT(iLo<=iHi); ASSERT(iHi<=n); } } ASSERT((side==Left && A.numCols()==m) || (side==Right && A.numCols()==n)); ASSERT((side==Left && tau.length()==(m-1)) || (side==Right && tau.length()==(n-1))); ASSERT((side==Left && work.length()>=max(IndexType(1),n)) || (side==Right && work.length()>=max(IndexType(1),m))); # endif // // Make copies of output arguments // # ifdef CHECK_CXXLAPACK typename GeMatrix<MA>::NoView A_org = A; typename GeMatrix<MC>::NoView C_org = C; typename DenseVector<VWORK>::NoView work_org = work; # endif // // Call implementation // LAPACK_SELECT::ormhr_impl(side, trans, iLo, iHi, A, tau, C, work); # ifdef CHECK_CXXLAPACK // // Make copies of results computed by the generic implementation // typename GeMatrix<MA>::NoView A_generic = A; typename GeMatrix<MC>::NoView C_generic = C; typename DenseVector<VWORK>::NoView work_generic = work; // // restore output arguments // A = A_org; C = C_org; work = work_org; // // Compare generic results with results from the native implementation // external::ormhr_impl(side, trans, iLo, iHi, A, tau, C, work); bool failed = false; if (! isIdentical(A_generic, A, "A_generic", "A")) { std::cerr << "CXXLAPACK: A_generic = " << A_generic << std::endl; std::cerr << "F77LAPACK: A = " << A << std::endl; failed = true; } if (! isIdentical(C_generic, C, "C_generic", "C")) { std::cerr << "CXXLAPACK: C_generic = " << C_generic << std::endl; std::cerr << "F77LAPACK: C = " << C << std::endl; failed = true; } if (! isIdentical(work_generic, work, "work_generic", "work")) { std::cerr << "CXXLAPACK: work_generic = " << work_generic << std::endl; std::cerr << "F77LAPACK: work = " << work << std::endl; failed = true; } if (failed) { std::cerr << "error in: ormhr.tcc" << std::endl; ASSERT(0); } else { // std::cerr << "passed: ormhr.tcc" << std::endl; } # endif } //-- forwarding ---------------------------------------------------------------- template <typename IndexType, typename MA, typename VTAU, typename MC> IndexType ormhr_wsq(Side side, Transpose trans, IndexType iLo, IndexType iHi, const MC &&C) { CHECKPOINT_ENTER; const IndexType info = ormhr_wsq(side, trans, iLo, iHi, C); CHECKPOINT_LEAVE; return info; } template <typename IndexType, typename MA, typename VTAU, typename MC, typename VWORK> void ormhr(Side side, Transpose trans, IndexType iLo, IndexType iHi, MA &&A, const VTAU &tau, MC &&C, VWORK &&work) { CHECKPOINT_ENTER; ormhr(side, trans, iLo, iHi, A, tau, C, work); CHECKPOINT_LEAVE; } } } // namespace lapack, flens #endif // FLENS_LAPACK_IMPL_ORMHR_TCC |