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operations.hpp
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operations.hpp
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#ifndef VEXCL_OPERATIONS_HPP
#define VEXCL_OPERATIONS_HPP
/*
The MIT License
Copyright (c) 2012 Denis Demidov <ddemidov@ksu.ru>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/**
* \file vexcl/operations.hpp
* \author Denis Demidov <ddemidov@ksu.ru>
* \brief Set of operations to be used in vector expressions.
*/
#ifdef WIN32
# pragma warning(push)
# define NOMINMAX
#endif
#include <array>
#include <tuple>
#include <boost/proto/proto.hpp>
#include <boost/mpl/max.hpp>
// Include boost.preprocessor header if variadic templates are not vailable.
// Also include it if we use gcc v4.6.
// This is required due to bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35722
#if defined(BOOST_NO_VARIADIC_TEMPLATES) || (defined(__GNUC__) && !defined(__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ == 6)
# include <boost/preprocessor/repetition.hpp>
# ifndef VEXCL_MAX_ARITY
# define VEXCL_MAX_ARITY BOOST_PROTO_MAX_ARITY
# endif
#endif
/// Vector expression template library for OpenCL.
namespace vex {
/// \cond INTERNAL
struct elem_index {
size_t offset;
elem_index(size_t offset = 0) : offset(offset) {}
};
template <>
inline std::string type_name<elem_index>() {
return type_name<size_t>();
}
/// \endcond
/// When used in vector expression, returns current element index plus offset.
inline typename boost::proto::result_of::as_expr<elem_index>::type
element_index(size_t offset = 0) {
return boost::proto::as_expr(elem_index(offset));
}
/// \cond INTERNAL
struct builtin_function {};
struct user_function {};
// TODO compare compilation speed with boost::proto::switch_
//--- Standard grammar (no terminals) ---------------------------------------
#define BUILTIN_OPERATIONS(grammar) \
boost::proto::or_< boost::proto::terminal< elem_index > >, \
boost::proto::or_< \
boost::proto::unary_plus< grammar >, \
boost::proto::negate< grammar >, \
boost::proto::logical_not< grammar >, \
boost::proto::pre_inc< grammar >, \
boost::proto::pre_dec< grammar >, \
boost::proto::post_inc< grammar >, \
boost::proto::post_dec< grammar > \
>, \
boost::proto::or_< \
boost::proto::or_< \
boost::proto::plus < grammar, grammar >, \
boost::proto::minus < grammar, grammar >, \
boost::proto::multiplies < grammar, grammar >, \
boost::proto::divides < grammar, grammar >, \
boost::proto::modulus < grammar, grammar >, \
boost::proto::shift_left < grammar, grammar >, \
boost::proto::shift_right < grammar, grammar > \
>, \
boost::proto::or_< \
boost::proto::less < grammar, grammar >, \
boost::proto::greater < grammar, grammar >, \
boost::proto::less_equal < grammar, grammar >, \
boost::proto::greater_equal < grammar, grammar >, \
boost::proto::equal_to < grammar, grammar >, \
boost::proto::not_equal_to < grammar, grammar > \
>, \
boost::proto::or_< \
boost::proto::logical_and < grammar, grammar >, \
boost::proto::logical_or < grammar, grammar > \
>, \
boost::proto::or_< \
boost::proto::bitwise_and < grammar, grammar >, \
boost::proto::bitwise_or < grammar, grammar >, \
boost::proto::bitwise_xor < grammar, grammar > \
> \
>, \
boost::proto::function< \
boost::proto::terminal< \
boost::proto::convertible_to<builtin_function> \
>, \
boost::proto::vararg<grammar> \
>
#define USER_FUNCTIONS(grammar) \
boost::proto::function< \
boost::proto::terminal< \
boost::proto::convertible_to<user_function> \
>, \
boost::proto::vararg<grammar> \
>
//--- Builtin function ------------------------------------------------------
#define BUILTIN_FUNCTION_1(func) \
struct func##_func : builtin_function { \
static const char* name() { \
return #func; \
} \
}; \
template <typename Arg> \
typename boost::proto::result_of::make_expr< \
boost::proto::tag::function, \
func##_func, \
const Arg& \
>::type const \
func(const Arg &arg) { \
return boost::proto::make_expr<boost::proto::tag::function>( \
func##_func(), \
boost::ref(arg) \
); \
}
#define BUILTIN_FUNCTION_2(func) \
struct func##_func : builtin_function { \
static const char* name() { \
return #func; \
} \
}; \
template <typename Arg1, typename Arg2> \
typename boost::proto::result_of::make_expr< \
boost::proto::tag::function, \
func##_func, \
const Arg1&, \
const Arg2& \
>::type const \
func(const Arg1 &arg1, const Arg2 &arg2) { \
return boost::proto::make_expr<boost::proto::tag::function>( \
func##_func(), \
boost::ref(arg1), \
boost::ref(arg2) \
); \
}
#define BUILTIN_FUNCTION_3(func) \
struct func##_func : builtin_function { \
static const char* name() { \
return #func; \
} \
}; \
template <typename Arg1, typename Arg2, typename Arg3> \
typename boost::proto::result_of::make_expr< \
boost::proto::tag::function, \
func##_func, \
const Arg1&, \
const Arg2&, \
const Arg3& \
>::type const \
func(const Arg1 &arg1, const Arg2 &arg2, const Arg3 &arg3) { \
return boost::proto::make_expr<boost::proto::tag::function>( \
func##_func(), \
boost::ref(arg1), \
boost::ref(arg2), \
boost::ref(arg3) \
); \
}
BUILTIN_FUNCTION_1(acos);
BUILTIN_FUNCTION_1(acosh);
BUILTIN_FUNCTION_1(acospi);
BUILTIN_FUNCTION_1(asin);
BUILTIN_FUNCTION_1(asinh);
BUILTIN_FUNCTION_1(asinpi);
BUILTIN_FUNCTION_1(atan);
BUILTIN_FUNCTION_2(atan2);
BUILTIN_FUNCTION_1(atanh);
BUILTIN_FUNCTION_1(atanpi);
BUILTIN_FUNCTION_2(atan2pi);
BUILTIN_FUNCTION_1(cbrt);
BUILTIN_FUNCTION_1(ceil);
BUILTIN_FUNCTION_2(copysign);
BUILTIN_FUNCTION_1(cos);
BUILTIN_FUNCTION_1(cosh);
BUILTIN_FUNCTION_1(cospi);
BUILTIN_FUNCTION_1(erfc);
BUILTIN_FUNCTION_1(erf);
BUILTIN_FUNCTION_1(exp);
BUILTIN_FUNCTION_1(exp2);
BUILTIN_FUNCTION_1(exp10);
BUILTIN_FUNCTION_1(expm1);
BUILTIN_FUNCTION_1(fabs);
BUILTIN_FUNCTION_2(fdim);
BUILTIN_FUNCTION_1(floor);
BUILTIN_FUNCTION_3(fma);
BUILTIN_FUNCTION_2(fmax);
BUILTIN_FUNCTION_2(fmin);
BUILTIN_FUNCTION_2(fmod);
BUILTIN_FUNCTION_2(fract);
BUILTIN_FUNCTION_2(frexp);
BUILTIN_FUNCTION_2(hypot);
BUILTIN_FUNCTION_1(ilogb);
BUILTIN_FUNCTION_2(ldexp);
BUILTIN_FUNCTION_1(lgamma);
BUILTIN_FUNCTION_2(lgamma_r);
BUILTIN_FUNCTION_1(log);
BUILTIN_FUNCTION_1(log2);
BUILTIN_FUNCTION_1(log10);
BUILTIN_FUNCTION_1(log1p);
BUILTIN_FUNCTION_1(logb);
BUILTIN_FUNCTION_3(mad);
BUILTIN_FUNCTION_2(maxmag);
BUILTIN_FUNCTION_2(minmag);
BUILTIN_FUNCTION_2(modf);
BUILTIN_FUNCTION_1(nan);
BUILTIN_FUNCTION_2(nextafter);
BUILTIN_FUNCTION_2(pow);
BUILTIN_FUNCTION_2(pown);
BUILTIN_FUNCTION_2(powr);
BUILTIN_FUNCTION_2(remainder);
BUILTIN_FUNCTION_3(remquo);
BUILTIN_FUNCTION_1(rint);
BUILTIN_FUNCTION_2(rootn);
BUILTIN_FUNCTION_1(round);
BUILTIN_FUNCTION_1(rsqrt);
BUILTIN_FUNCTION_1(sin);
BUILTIN_FUNCTION_2(sincos);
BUILTIN_FUNCTION_1(sinh);
BUILTIN_FUNCTION_1(sinpi);
BUILTIN_FUNCTION_1(sqrt);
BUILTIN_FUNCTION_1(tan);
BUILTIN_FUNCTION_1(tanh);
BUILTIN_FUNCTION_1(tanpi);
BUILTIN_FUNCTION_1(tgamma);
BUILTIN_FUNCTION_1(trunc);
#undef BUILTIN_FUNCTION_1
#undef BUILTIN_FUNCTION_2
#undef BUILTIN_FUNCTION_3
#define VEXCL_VECTOR_EXPR_EXTRACTOR(name, VG, AG, FG) \
struct name \
: boost::proto::or_< \
boost::proto::when<VG, boost::proto::_>, \
boost::proto::when< \
boost::proto::plus< FG, AG >, \
name(boost::proto::_left) \
>, \
boost::proto::when< \
boost::proto::plus< AG, FG >, \
name(boost::proto::_right) \
>, \
boost::proto::when< \
boost::proto::minus< FG, AG >, \
name(boost::proto::_left) \
>, \
boost::proto::when< \
boost::proto::minus< AG, FG >, \
boost::proto::_make_negate( name(boost::proto::_right) ) \
>, \
boost::proto::when< \
boost::proto::binary_expr<boost::proto::_, name, name > \
> \
> \
{}
#define VEXCL_ADDITIVE_EXPR_EXTRACTOR(name, VG, AG, FG) \
struct name \
: boost::proto::or_< \
boost::proto::when<AG, boost::proto::_> \
, boost::proto::when< \
boost::proto::plus<FG, VG >, \
name(boost::proto::_left) \
> \
, boost::proto::when< \
boost::proto::plus< VG, FG >, \
name(boost::proto::_right) \
> \
, boost::proto::when< \
boost::proto::minus<FG, VG >, \
name(boost::proto::_left) \
> \
, boost::proto::when< \
boost::proto::minus<VG, FG >, \
boost::proto::_make_negate( name(boost::proto::_right) ) \
> \
, boost::proto::when< \
boost::proto::binary_expr<boost::proto::_, name, name > \
> \
> \
{}
//--- User Function ---------------------------------------------------------
template <const char *body, class T>
struct UserFunction {};
// Workaround for gcc bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35722
#if !defined(BOOST_NO_VARIADIC_TEMPLATES) && ((!defined(__GNUC__) || (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 6)) || defined(__clang__))
template<const char *body, class RetType, class... ArgType>
struct UserFunction<body, RetType(ArgType...)> : user_function
{
template <class... Arg>
typename boost::proto::result_of::make_expr<
boost::proto::tag::function,
UserFunction,
const Arg&...
>::type const
operator()(const Arg&... arg) {
return boost::proto::make_expr<boost::proto::tag::function>(
UserFunction(), boost::ref(arg)...
);
}
static void define(std::ostream &os, const std::string &name) {
os << type_name<RetType>() << " " << name << "(";
show_arg<ArgType...>(os, 1);
os << "\n)\n{\n" << body << "\n}\n\n";
}
template <class Head>
static void show_arg(std::ostream &os, uint pos) {
if (pos > 1) os << ",";
os << "\n\t" << type_name<Head>() << " prm" << pos;
}
template <class Head, class... Tail>
static typename std::enable_if<sizeof...(Tail), void>::type
show_arg(std::ostream &os, uint pos) {
if (pos > 1) os << ",";
show_arg<Tail...>(
os << "\n\t" << type_name<Head>() << " prm" << pos, pos + 1
);
}
};
#else
#define PRINT_ARG_REF(z, n, data) const Arg ## n&
#define PRINT_PARAM(z, n, data) const Arg ## n &arg ## n
#define PRINT_BOOST_REF(z, n, data) boost::ref(arg ## n)
#define PRINT_PRM_DEF(z, n, data) \
<< "\n\t" << type_name<ArgType ## n>() \
<< " prm" << n + 1 BOOST_PP_EXPR_IF(BOOST_PP_LESS(BOOST_PP_ADD(n, 1), data), << ",")
#define USER_FUNCTION(z, n, data) \
template< const char *body, class RetType, BOOST_PP_ENUM_PARAMS(n, class ArgType) > \
struct UserFunction<body, RetType( BOOST_PP_ENUM_PARAMS(n, ArgType) )> : user_function \
{ \
template < BOOST_PP_ENUM_PARAMS(n, class Arg) > \
typename boost::proto::result_of::make_expr< \
boost::proto::tag::function, \
UserFunction, \
BOOST_PP_ENUM(n, PRINT_ARG_REF, ~) \
>::type const \
operator()( BOOST_PP_ENUM(n, PRINT_PARAM, ~) ) { \
return boost::proto::make_expr<boost::proto::tag::function>( \
UserFunction(), BOOST_PP_ENUM(n, PRINT_BOOST_REF, ~) \
); \
} \
static void define(std::ostream &os, const std::string &name) { \
os << type_name<RetType>() << " " << name << "(" \
BOOST_PP_REPEAT(n, PRINT_PRM_DEF, n) \
<< "\n)\n{\n" << body << "\n}\n\n"; \
} \
};
BOOST_PP_REPEAT_FROM_TO(1, VEXCL_MAX_ARITY, USER_FUNCTION, ~)
#undef PRINT_ARG_REF
#undef PRINT_PARAM
#undef PRINT_BOOST_REF
#undef PRINT_PRM_DEF
#undef USER_FUNCTION
#endif
//---------------------------------------------------------------------------
// Expression Transforms
//---------------------------------------------------------------------------
template <class Context>
struct do_eval {
Context &ctx;
do_eval(Context &ctx) : ctx(ctx) {}
template <class Expr>
void operator()(const Expr &expr) const {
boost::proto::eval(expr, ctx);
}
};
struct process_terminal
: boost::proto::transform < process_terminal >
{
template<typename Expr, typename Unused1, typename Unused2>
struct impl : boost::proto::transform_impl<Expr, Unused1, Unused2>
{
typedef typename impl::expr_param result_type;
result_type operator ()(
typename impl::expr_param term
, typename impl::state_param process
, typename impl::data_param) const
{
process(term);
return term;
}
};
};
struct extract_terminals
: boost::proto::or_ <
boost::proto::when <
boost::proto::terminal<boost::proto::_>,
process_terminal
> ,
boost::proto::function<
boost::proto::_,
boost::proto::vararg< extract_terminals >
> ,
boost::proto::when <
boost::proto::nary_expr<
boost::proto::_,
boost::proto::vararg< extract_terminals >
>
>
>
{};
struct extract_user_functions
: boost::proto::or_ <
boost::proto::terminal<boost::proto::_>,
boost::proto::when <
boost::proto::function<
boost::proto::terminal <
boost::proto::convertible_to<vex::user_function>
>,
boost::proto::vararg< extract_user_functions >
>,
process_terminal(boost::proto::_child0)
> ,
boost::proto::when <
boost::proto::nary_expr<
boost::proto::_,
boost::proto::vararg< extract_user_functions >
>
>
>
{};
//---------------------------------------------------------------------------
// Elementwise vector operations
//---------------------------------------------------------------------------
struct vector_terminal {};
template <typename T> class vector;
//--- Vector grammar --------------------------------------------------------
struct vector_expr_grammar
: boost::proto::or_<
boost::proto::or_<
boost::proto::terminal< vector_terminal >,
boost::proto::and_<
boost::proto::terminal< boost::proto::_ >,
boost::proto::if_< std::is_arithmetic< boost::proto::_value >() >
>
>,
BUILTIN_OPERATIONS(vector_expr_grammar),
USER_FUNCTIONS(vector_expr_grammar)
>
{};
struct additive_vector_transform {};
struct additive_vector_transform_grammar
: boost::proto::or_<
boost::proto::terminal< additive_vector_transform >,
boost::proto::plus<
additive_vector_transform_grammar,
additive_vector_transform_grammar
>,
boost::proto::minus<
additive_vector_transform_grammar,
additive_vector_transform_grammar
>,
boost::proto::negate<
additive_vector_transform_grammar
>
>
{};
struct vector_full_grammar
: boost::proto::or_<
vector_expr_grammar,
boost::proto::terminal< additive_vector_transform >,
boost::proto::plus< vector_full_grammar, vector_full_grammar >,
boost::proto::minus< vector_full_grammar, vector_full_grammar >,
boost::proto::negate< vector_full_grammar >
>
{};
template <class Expr>
struct vector_expression;
struct vector_domain
: boost::proto::domain<
boost::proto::generator<vector_expression>,
vector_full_grammar
>
{ };
template <class Expr>
struct vector_expression
: boost::proto::extends< Expr, vector_expression<Expr>, vector_domain>
{
vector_expression(const Expr &expr = Expr())
: boost::proto::extends< Expr, vector_expression<Expr>, vector_domain>(expr) {}
};
//--- Vector contexts and transform helpers ---------------------------------
// Builds kernel name for a vector expression.
struct vector_name_context {
std::ostream &os;
vector_name_context(std::ostream &os) : os(os) {}
// Any expression except function or terminal is only interesting for its
// children:
template <typename Expr, typename Tag = typename Expr::proto_tag>
struct eval {
typedef void result_type;
void operator()(const Expr &expr, vector_name_context &ctx) const {
ctx.os << Tag() << "_";
boost::fusion::for_each(expr, do_eval<vector_name_context>(ctx));
}
};
// We only need to look at parameters of a function:
template <typename Expr>
struct eval<Expr, boost::proto::tag::function> {
typedef void result_type;
template <class FunCall>
typename std::enable_if<
std::is_base_of<
builtin_function,
typename boost::proto::result_of::value<
typename boost::proto::result_of::child_c<FunCall,0>::type
>::type
>::value,
void
>::type
operator()(const FunCall &expr, vector_name_context &ctx) const {
ctx.os << boost::proto::value(boost::proto::child_c<0>(expr)).name() << "_";
boost::fusion::for_each(
boost::fusion::pop_front(expr),
do_eval<vector_name_context>(ctx)
);
}
template <class FunCall>
typename std::enable_if<
std::is_base_of<
user_function,
typename boost::proto::result_of::value<
typename boost::proto::result_of::child_c<FunCall,0>::type
>::type
>::value,
void
>::type
operator()(const FunCall &expr, vector_name_context &ctx) const {
ctx.os << "func" << boost::fusion::size(expr) - 1 << "_";
boost::fusion::for_each(
boost::fusion::pop_front(expr),
do_eval<vector_name_context>(ctx)
);
}
};
template <typename Expr>
struct eval<Expr, boost::proto::tag::terminal> {
typedef void result_type;
void operator()(const Expr &expr, vector_name_context &ctx) const {
ctx.os << "term_";
}
};
};
// Builds textual representation for a vector expression.
struct vector_expr_context {
std::ostream &os;
int cmp_idx, prm_idx, fun_idx;
vector_expr_context(std::ostream &os, int cmp_idx = 1)
: os(os), cmp_idx(cmp_idx), prm_idx(0), fun_idx(0) {}
template <typename Expr, typename Tag = typename Expr::proto_tag>
struct eval {};
#define BINARY_OPERATION(the_tag, the_op) \
template <typename Expr> \
struct eval<Expr, boost::proto::tag::the_tag> { \
typedef void result_type; \
void operator()(const Expr &expr, vector_expr_context &ctx) const { \
ctx.os << "( "; \
boost::proto::eval(boost::proto::left(expr), ctx); \
ctx.os << " " #the_op " "; \
boost::proto::eval(boost::proto::right(expr), ctx); \
ctx.os << " )"; \
} \
}
BINARY_OPERATION(plus, +);
BINARY_OPERATION(minus, -);
BINARY_OPERATION(multiplies, *);
BINARY_OPERATION(divides, /);
BINARY_OPERATION(modulus, %);
BINARY_OPERATION(shift_left, <<);
BINARY_OPERATION(shift_right, >>);
BINARY_OPERATION(less, <);
BINARY_OPERATION(greater, >);
BINARY_OPERATION(less_equal, <=);
BINARY_OPERATION(greater_equal,>=);
BINARY_OPERATION(equal_to, ==);
BINARY_OPERATION(not_equal_to, !=);
BINARY_OPERATION(logical_and, &&);
BINARY_OPERATION(logical_or, ||);
BINARY_OPERATION(bitwise_and, &);
BINARY_OPERATION(bitwise_or, |);
BINARY_OPERATION(bitwise_xor, ^);
#undef BINARY_OPERATION
#define UNARY_PRE_OPERATION(the_tag, the_op) \
template <typename Expr> \
struct eval<Expr, boost::proto::tag::the_tag> { \
typedef void result_type; \
void operator()(const Expr &expr, vector_expr_context &ctx) const { \
ctx.os << "( " #the_op "( "; \
boost::proto::eval(boost::proto::child(expr), ctx); \
ctx.os << " ) )"; \
} \
}
UNARY_PRE_OPERATION(unary_plus, +);
UNARY_PRE_OPERATION(negate, -);
UNARY_PRE_OPERATION(logical_not, !);
UNARY_PRE_OPERATION(pre_inc, ++);
UNARY_PRE_OPERATION(pre_dec, --);
#undef UNARY_PRE_OPERATION
#define UNARY_POST_OPERATION(the_tag, the_op) \
template <typename Expr> \
struct eval<Expr, boost::proto::tag::the_tag> { \
typedef void result_type; \
void operator()(const Expr &expr, vector_expr_context &ctx) const { \
ctx.os << "( ( "; \
boost::proto::eval(boost::proto::child(expr), ctx); \
ctx.os << " )" #the_op " )"; \
} \
}
UNARY_POST_OPERATION(post_inc, ++);
UNARY_POST_OPERATION(post_dec, --);
#undef UNARY_POST_OPERATION
template <typename Expr>
struct eval<Expr, boost::proto::tag::function> {
typedef void result_type;
struct do_eval {
mutable int pos;
vector_expr_context &ctx;
do_eval(vector_expr_context &ctx) : pos(0), ctx(ctx) {}
template <typename Arg>
void operator()(const Arg &arg) const {
if (pos++) ctx.os << ", ";
boost::proto::eval(arg, ctx);
}
};
template <class FunCall>
typename std::enable_if<
std::is_base_of<
builtin_function,
typename boost::proto::result_of::value<
typename boost::proto::result_of::child_c<FunCall,0>::type
>::type
>::value,
void
>::type
operator()(const FunCall &expr, vector_expr_context &ctx) const {
ctx.os << boost::proto::value(boost::proto::child_c<0>(expr)).name() << "( ";
boost::fusion::for_each(
boost::fusion::pop_front(expr), do_eval(ctx)
);
ctx.os << " )";
}
template <class FunCall>
typename std::enable_if<
std::is_base_of<
user_function,
typename boost::proto::result_of::value<
typename boost::proto::result_of::child_c<FunCall,0>::type
>::type
>::value,
void
>::type
operator()(const FunCall &expr, vector_expr_context &ctx) const {
ctx.os << "func_" << ctx.cmp_idx << "_" << ++ctx.fun_idx << "( ";
boost::fusion::for_each(
boost::fusion::pop_front(expr), do_eval(ctx)
);
ctx.os << " )";
}
};
template <typename Expr>
struct eval<Expr, boost::proto::tag::terminal> {
typedef void result_type;
template <typename T>
void operator()(const vector<T> &term, vector_expr_context &ctx) const {
ctx.os << "prm_" << ctx.cmp_idx << "_" << ++ctx.prm_idx << "[idx]";
}
template <typename Term>
typename std::enable_if<
!std::is_same<typename boost::proto::result_of::value<Term>::type, elem_index>::value,
void
>::type
operator()(const Term &term, vector_expr_context &ctx) const {
ctx.os << "prm_" << ctx.cmp_idx << "_" << ++ctx.prm_idx;
}
template <typename Term>
typename std::enable_if<
std::is_same<typename boost::proto::result_of::value<Term>::type, elem_index>::value,
void
>::type
operator()(const Term &term, vector_expr_context &ctx) const {
ctx.os << "( prm_" << ctx.cmp_idx << "_" << ++ctx.prm_idx
<< " + idx )";
}
};
};
struct declare_user_function {
std::ostream &os;
int cmp_idx;
mutable int fun_idx;
declare_user_function(std::ostream &os, int cmp_idx = 1)
: os(os), cmp_idx(cmp_idx), fun_idx(0) {}
template <class FunCall>
void operator()(const FunCall &expr) const {
std::ostringstream name;
name << "func_" << cmp_idx << "_" << ++fun_idx;
// Output function definition and continue with parameters.
boost::proto::value(expr).define(os, name.str());
}
};
struct declare_expression_parameter {
std::ostream &os;
int cmp_idx;
mutable int prm_idx;
declare_expression_parameter(std::ostream &os, int cmp_idx = 1)
: os(os), cmp_idx(cmp_idx), prm_idx(0) {}
template <typename T>
void operator()(const vector<T> &term) const {
os << ",\n\tglobal " << type_name<T>() << " *prm_"
<< cmp_idx << "_" << ++prm_idx;
}
template <typename Term>
void operator()(const Term &term) const {
os << ",\n\t"
<< type_name< typename boost::proto::result_of::value<Term>::type >()
<< " prm_" << cmp_idx << "_" << ++prm_idx;
}
};
struct set_expression_argument {
cl::Kernel &krn;
uint dev, &pos;
size_t part_start;
set_expression_argument(cl::Kernel &krn, uint dev, uint &pos, size_t part_start)
: krn(krn), dev(dev), pos(pos), part_start(part_start) {}
template <typename T>
void operator()(const vector<T> &term) const {
krn.setArg(pos++, term(dev));
}
template <typename Term>
typename std::enable_if<
!std::is_same<typename boost::proto::result_of::value<Term>::type, elem_index>::value,
void
>::type
operator()(const Term &term) const {
krn.setArg(pos++, boost::proto::value(term));
}
template <typename Term>
typename std::enable_if<
std::is_same<typename boost::proto::result_of::value<Term>::type, elem_index>::value,
void
>::type
operator()(const Term &term) const {
krn.setArg(pos++, boost::proto::value(term).offset + part_start);
}
};
struct get_expression_properties {
mutable std::vector<cl::CommandQueue> const* queue;
mutable std::vector<size_t> const* part;
mutable size_t size;
get_expression_properties() : queue(0), part(0), size(0) {}
size_t part_start(uint d) const {
return part ? (*part)[d] : 0;
}
size_t part_size(uint d) const {
return part ? (*part)[d + 1] - (*part)[d] : 0;
}
template <typename T>
void operator()(const vector<T> &term) const {
if (!queue) {
queue = &( term.queue_list() );
part = &( term.partition() );
size = term.size();
}
}
template <typename Term>
void operator()(const Term &term) const { }
};
//---------------------------------------------------------------------------
VEXCL_VECTOR_EXPR_EXTRACTOR(extract_vector_expressions,
vector_expr_grammar,
additive_vector_transform_grammar,
vector_full_grammar
);
VEXCL_ADDITIVE_EXPR_EXTRACTOR(extract_additive_vector_transforms,
vector_expr_grammar,
additive_vector_transform_grammar,
vector_full_grammar
);
struct simplify_additive_transform
: boost::proto::or_<
boost::proto::terminal< boost::proto::_ >,
boost::proto::when<
boost::proto::negate< boost::proto::terminal< boost::proto::_ > >,
boost::proto::_
>,
boost::proto::when<
boost::proto::negate< boost::proto::negate< boost::proto::_ > >,
simplify_additive_transform(boost::proto::_child(boost::proto::_child))
>,
boost::proto::plus< simplify_additive_transform, simplify_additive_transform >,
boost::proto::when<
boost::proto::minus< boost::proto::_, boost::proto::_ >,
boost::proto::_make_plus(
simplify_additive_transform(boost::proto::_left),
simplify_additive_transform(boost::proto::_make_negate(boost::proto::_right))
)
>,
boost::proto::when<
boost::proto::negate< boost::proto::plus<boost::proto::_, boost::proto::_> >,
boost::proto::_make_plus(
simplify_additive_transform(boost::proto::_make_negate(boost::proto::_left(boost::proto::_child))),
simplify_additive_transform(boost::proto::_make_negate(boost::proto::_right(boost::proto::_child)))
)
>,
boost::proto::when<
boost::proto::negate< boost::proto::minus<boost::proto::_, boost::proto::_> >,
boost::proto::_make_plus(
simplify_additive_transform(boost::proto::_make_negate(boost::proto::_left(boost::proto::_child))),
simplify_additive_transform(boost::proto::_right(boost::proto::_child))
)
>
>
{};
//---------------------------------------------------------------------------
template <class Vector>
struct additive_vector_transform_context {
Vector &dest;
bool initialized;
additive_vector_transform_context(Vector &dest, bool initialized = false)
: dest(dest), initialized(initialized) {}
template <typename Expr, typename Tag = typename Expr::proto_tag>
struct eval {};
template <typename Expr>
struct eval<Expr, boost::proto::tag::terminal> {
typedef int result_type;
template <typename T>
result_type operator()(const T &t, additive_vector_transform_context &ctx) const
{
if (ctx.initialized) {
t.apply(ctx.dest, 1, true);
} else {
t.apply(ctx.dest, 1, false);
ctx.initialized = true;
}
return 0;
}
};
template <typename Expr>
struct eval<Expr, boost::proto::tag::negate> {
typedef int result_type;
template <typename T>
result_type operator()(const T &t, additive_vector_transform_context &ctx) const
{
if (ctx.initialized) {
boost::proto::child(t).apply(ctx.dest, -1, true);
} else {
boost::proto::child(t).apply(ctx.dest, -1, false);
ctx.initialized = true;
}
return 0;
}
};
};
//---------------------------------------------------------------------------
// Elementwise multi-vector operations
//---------------------------------------------------------------------------
//--- Scalars and helper types/functions used in multivector expressions ----
template <class T, class Enable = void>
struct is_multiscalar : std::false_type