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lib/kokkos/example/multi_fem/LinAlgBLAS.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// 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 Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "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 SANDIA CORPORATION OR THE
// 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.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef USESCASES_LINALG_BLAS_HPP
#define USESCASES_LINALG_BLAS_HPP
#include <cmath>
#include <utility>
#include <ParallelComm.hpp>
#include <Kokkos_Core.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
template< class Scalar , class Layout , class DeviceType > struct Dot ;
template< class Scalar , class Layout , class DeviceType > struct Dot1 ;
template< typename ScalarA ,
typename ScalarY ,
class Layout , class Device >
struct Scale ;
template< typename ScalarA ,
typename ScalarY ,
class Layout , class Device >
struct Fill ;
template< typename ScalarA ,
typename ScalarX ,
typename ScalarY ,
class Layout , class Device >
struct AXPY ;
template< typename ScalarX ,
typename ScalarB ,
typename ScalarY ,
class Layout , class Device >
struct XPBY ;
template< typename ScalarA ,
typename ScalarX ,
typename ScalarB ,
typename ScalarY ,
typename ScalarW ,
class Layout , class Device >
struct WAXPBY ;
}
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
//----------------------------------------------------------------------------
#if defined( KOKKOS_HAVE_MPI )
template< typename ScalarX /* Allow mix of const and non-const */ ,
typename ScalarY /* Allow mix of const and non-const */ ,
class L , class D ,
class MX /* Allow any management type */ ,
class MY /* Allow any management type */ >
inline
double dot( const size_t n ,
const View< ScalarX * , L , D , MX > & x ,
const View< ScalarY * , L , D , MY > & y ,
comm::Machine machine )
{
double global_result = 0 ;
double local_result = 0 ;
Impl::Dot< ScalarX , L , D >( n , x , y , local_result );
MPI_Allreduce( & local_result , & global_result , 1 ,
MPI_DOUBLE , MPI_SUM , machine.mpi_comm );
return global_result ;
}
#else
template< typename ScalarX /* Allow mix of const and non-const */ ,
typename ScalarY /* Allow mix of const and non-const */ ,
class L , class D ,
class MX /* Allow any management type */ ,
class MY /* Allow any management type */ >
inline
double dot( const size_t n ,
const View< ScalarX * , L , D , MX > & x ,
const View< ScalarY * , L , D , MY > & y ,
comm::Machine )
{
double global_result = 0 ;
Impl::Dot< ScalarX , L , D >( n , x , y , global_result );
return global_result ;
}
#endif
//----------------------------------------------------------------------------
#if defined( KOKKOS_HAVE_MPI )
template< typename ScalarX /* Allow mix of const and non-const */ ,
class L , class D ,
class MX /* Allow any management type */ >
inline
double dot( const size_t n ,
const View< ScalarX * , L , D , MX > & x ,
comm::Machine machine )
{
double global_result = 0 ;
double local_result = 0 ;
Impl::Dot1< ScalarX , L , D >( n , x , local_result );
MPI_Allreduce( & local_result , & global_result , 1 ,
MPI_DOUBLE , MPI_SUM , machine.mpi_comm );
return global_result ;
}
#else
template< typename ScalarX /* Allow mix of const and non-const */ ,
class L , class D ,
class MX /* Allow any management type */ >
inline
double dot( const size_t n ,
const View< ScalarX * , L , D , MX > & x ,
comm::Machine )
{
double global_result = 0 ;
Impl::Dot1< ScalarX , L , D >( n , x , global_result );
return global_result ;
}
#endif
//----------------------------------------------------------------------------
template< typename ScalarX /* Allow mix of const and non-const */ ,
class L , class D ,
class MX /* Allow any management type */ >
inline
double norm2( const size_t n ,
const View< ScalarX * , L , D , MX > & x ,
comm::Machine machine )
{
return std::sqrt( dot( n , x , machine ) );
}
//----------------------------------------------------------------------------
template< typename ScalarA ,
typename ScalarX ,
class L ,
class D ,
class MX >
void scale( const size_t n ,
const ScalarA & alpha ,
const View< ScalarX * , L , D , MX > & x )
{
Impl::Scale< ScalarA , ScalarX , L , D >( n , alpha , x );
}
template< typename ScalarA ,
typename ScalarX ,
class L ,
class D ,
class MX >
void fill( const size_t n ,
const ScalarA & alpha ,
const View< ScalarX * , L , D , MX > & x )
{
Impl::Fill< ScalarA , ScalarX , L , D >( n , alpha , x );
}
//----------------------------------------------------------------------------
template< typename ScalarA ,
typename ScalarX ,
typename ScalarY ,
class L ,
class D ,
class MX ,
class MY >
void axpy( const size_t n ,
const ScalarA & alpha ,
const View< ScalarX *, L , D , MX > & x ,
const View< ScalarY *, L , D , MY > & y )
{
Impl::AXPY< ScalarA, ScalarX, ScalarY , L , D >( n, alpha, x, y );
}
//----------------------------------------------------------------------------
template< typename ScalarX ,
typename ScalarB ,
typename ScalarY ,
class L ,
class D ,
class MX ,
class MY >
void xpby( const size_t n ,
const View< ScalarX *, L , D , MX > & x ,
const ScalarB & beta ,
const View< ScalarY *, L , D , MY > & y )
{
Impl::XPBY< ScalarX, ScalarB, ScalarY , L , D >( n, x, beta, y );
}
//----------------------------------------------------------------------------
// w = alpha * x + beta * y
template< typename ScalarA ,
typename ScalarX ,
typename ScalarB ,
typename ScalarY ,
typename ScalarW ,
class L , class D ,
class MX , class MY , class MW >
void waxpby( const size_t n ,
const ScalarA & alpha ,
const View< ScalarX * , L , D , MX > & x ,
const ScalarB & beta ,
const View< ScalarY * , L , D , MY > & y ,
const View< ScalarW * , L , D , MW > & w )
{
Impl::WAXPBY<ScalarA,ScalarX,ScalarB,ScalarY,ScalarW,L,D>
( n , alpha , x , beta , y , w );
}
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
template< typename Scalar , class L , class D >
struct Dot
{
private:
typedef View< const Scalar*, L, D, MemoryUnmanaged > vector_const_type ;
const vector_const_type x ;
const vector_const_type y ;
public:
typedef typename vector_const_type::execution_space execution_space ; // Manycore device
typedef double value_type ; // Reduction value
template< class ArgX , class ArgY >
inline
Dot( const size_t n , const ArgX & arg_x , const ArgY & arg_y , double & result )
: x( arg_x ), y( arg_y )
{
parallel_reduce( n , *this , result );
}
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i , value_type & update ) const
{ update += x(i) * y(i); }
KOKKOS_INLINE_FUNCTION
static void join( volatile value_type & update ,
const volatile value_type & source )
{ update += source; }
KOKKOS_INLINE_FUNCTION
static void init( value_type & update )
{ update = 0 ; }
}; // Dot
//----------------------------------------------------------------------------
template< typename Scalar , class L , class D >
struct Dot1
{
private:
typedef View< const Scalar*, L, D , MemoryUnmanaged > vector_const_type ;
const vector_const_type x ;
public:
typedef typename vector_const_type::execution_space execution_space ; // Manycore device
typedef double value_type ; // Reduction value
template< class ArgX >
inline
Dot1( const size_t n , const ArgX & arg_x , double & result )
: x( arg_x )
{
parallel_reduce( n , *this , result );
}
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i , value_type & update ) const
{ update += x(i) * x(i) ; }
KOKKOS_INLINE_FUNCTION
static void join( volatile value_type & update ,
const volatile value_type & source )
{ update += source ; }
KOKKOS_INLINE_FUNCTION
static void init( value_type & update )
{ update = 0 ; }
}; // Dot
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
template < typename ScalarA ,
typename ScalarX ,
typename ScalarB ,
typename ScalarY ,
typename ScalarW ,
class L , class D >
struct WAXPBY
{
private:
typedef View< ScalarW *, L , D , MemoryUnmanaged > ViewW ;
typedef View< const ScalarX *, L , D , MemoryUnmanaged > ViewX ;
typedef View< const ScalarY *, L , D , MemoryUnmanaged > ViewY ;
const ViewW w ;
const ViewX x ;
const ViewY y ;
const ScalarA alpha ;
const ScalarB beta ;
public:
typedef typename ViewW::execution_space execution_space ;
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType inode ) const
{
w(inode) = alpha * x(inode) + beta * y(inode);
}
template< class ArgX , class ArgY , class ArgW >
inline
WAXPBY( const size_t n ,
const ScalarA & arg_alpha ,
const ArgX & arg_x ,
const ScalarB & arg_beta ,
const ArgY & arg_y ,
const ArgW & arg_w )
: w( arg_w ), x( arg_x ), y( arg_y )
, alpha( arg_alpha ), beta( arg_beta )
{
parallel_for( n , *this );
}
}; // WAXPBY
//----------------------------------------------------------------------------
template < typename ScalarB ,
typename ScalarW ,
class L , class D >
struct Scale
{
private:
typedef View< ScalarW *, L , D , MemoryUnmanaged > ViewW ;
const ViewW w ;
const ScalarB beta ;
public:
typedef typename ViewW::execution_space execution_space ;
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i ) const
{ w(i) *= beta ; }
template< class ArgW >
inline
Scale( const size_t n , const ScalarB & arg_beta , const ArgW & arg_w )
: w( arg_w )
, beta( arg_beta )
{
parallel_for( n , *this );
}
};
template < typename ScalarB ,
typename ScalarW ,
class L , class D >
struct Fill
{
private:
typedef View< ScalarW *, L , D , MemoryUnmanaged > ViewW ;
const ViewW w ;
const ScalarB beta ;
public:
typedef typename ViewW::execution_space execution_space ;
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i ) const
{ w(i) = beta ; }
template< class ArgW >
inline
Fill( const size_t n , const ScalarB & arg_beta , const ArgW & arg_w )
: w( arg_w )
, beta( arg_beta )
{
parallel_for( n , *this );
}
};
//----------------------------------------------------------------------------
template < typename ScalarA ,
typename ScalarX ,
typename ScalarW ,
class L , class D >
struct AXPY
{
private:
typedef View< ScalarW *, L , D , MemoryUnmanaged > ViewW ;
typedef View< const ScalarX *, L , D , MemoryUnmanaged > ViewX ;
const ViewW w ;
const ViewX x ;
const ScalarA alpha ;
public:
typedef typename ViewW::execution_space execution_space ;
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i ) const
{ w(i) += alpha * x(i); }
template< class ArgX , class ArgW >
inline
AXPY( const size_t n ,
const ScalarA & arg_alpha ,
const ArgX & arg_x ,
const ArgW & arg_w )
: w( arg_w ), x( arg_x )
, alpha( arg_alpha )
{
parallel_for( n , *this );
}
}; // AXPY
template< typename ScalarX ,
typename ScalarB ,
typename ScalarW ,
class L , class D >
struct XPBY
{
private:
typedef View< ScalarW *, L , D , MemoryUnmanaged > ViewW ;
typedef View< const ScalarX *, L , D , MemoryUnmanaged > ViewX ;
const ViewW w ;
const ViewX x ;
const ScalarB beta ;
public:
typedef typename ViewW::execution_space execution_space ;
template< typename iType >
KOKKOS_INLINE_FUNCTION
void operator()( const iType & i ) const
{ w(i) = x(i) + beta * w(i); }
template< class ArgX , class ArgW >
inline
XPBY( const size_t n ,
const ArgX & arg_x ,
const ScalarB & arg_beta ,
const ArgW & arg_w )
: w( arg_w ), x( arg_x )
, beta( arg_beta )
{
parallel_for( n , *this );
}
}; // XPBY
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
} // namespace Impl
} // namespace Kokkos
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
#endif /* #ifndef USESCASES_LINALG_BLAS_HPP */