/usr/include/viennacl/scheduler/execute.hpp is in libviennacl-dev 1.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#define VIENNACL_SCHEDULER_EXECUTE_HPP
/* =========================================================================
Copyright (c) 2010-2014, Institute for Microelectronics,
Institute for Analysis and Scientific Computing,
TU Wien.
Portions of this software are copyright by UChicago Argonne, LLC.
-----------------
ViennaCL - The Vienna Computing Library
-----------------
Project Head: Karl Rupp rupp@iue.tuwien.ac.at
(A list of authors and contributors can be found in the PDF manual)
License: MIT (X11), see file LICENSE in the base directory
============================================================================= */
/** @file viennacl/scheduler/execute.hpp
@brief Provides the datastructures for dealing with a single statement such as 'x = y + z;'
*/
#include "viennacl/forwards.h"
#include "viennacl/scheduler/forwards.h"
#include "viennacl/scheduler/execute_scalar_assign.hpp"
#include "viennacl/scheduler/execute_axbx.hpp"
#include "viennacl/scheduler/execute_elementwise.hpp"
#include "viennacl/scheduler/execute_matrix_prod.hpp"
namespace viennacl
{
namespace scheduler
{
namespace detail
{
/** @brief Deals with x = RHS where RHS is an expression and x is either a scalar, a vector, or a matrix */
void execute_composite(statement const & s, statement_node const & root_node)
{
statement::container_type const & expr = s.array();
statement_node const & leaf = expr[root_node.rhs.node_index];
if (leaf.op.type == OPERATION_BINARY_ADD_TYPE || leaf.op.type == OPERATION_BINARY_SUB_TYPE) // x = (y) +- (z) where y and z are either data objects or expressions
{
execute_axbx(s, root_node);
}
else if (leaf.op.type == OPERATION_BINARY_MULT_TYPE || leaf.op.type == OPERATION_BINARY_DIV_TYPE) // x = (y) * / alpha;
{
bool scalar_is_temporary = (leaf.rhs.type_family != SCALAR_TYPE_FAMILY);
statement_node scalar_temp_node;
if (scalar_is_temporary)
{
lhs_rhs_element temp;
temp.type_family = SCALAR_TYPE_FAMILY;
temp.subtype = DEVICE_SCALAR_TYPE;
temp.numeric_type = root_node.lhs.numeric_type;
detail::new_element(scalar_temp_node.lhs, temp);
scalar_temp_node.op.type_family = OPERATION_BINARY_TYPE_FAMILY;
scalar_temp_node.op.type = OPERATION_BINARY_ASSIGN_TYPE;
scalar_temp_node.rhs.type_family = COMPOSITE_OPERATION_FAMILY;
scalar_temp_node.rhs.subtype = INVALID_SUBTYPE;
scalar_temp_node.rhs.numeric_type = INVALID_NUMERIC_TYPE;
scalar_temp_node.rhs.node_index = leaf.rhs.node_index;
// work on subexpression:
// TODO: Catch exception, free temporary, then rethrow
execute_composite(s, scalar_temp_node);
}
if (leaf.lhs.type_family == COMPOSITE_OPERATION_FAMILY) //(y) is an expression, so introduce a temporary z = (y):
{
statement_node new_root_y;
new_root_y.lhs.type_family = root_node.lhs.type_family;
new_root_y.lhs.subtype = root_node.lhs.subtype;
new_root_y.lhs.numeric_type = root_node.lhs.numeric_type;
detail::new_element(new_root_y.lhs, root_node.lhs);
new_root_y.op.type_family = OPERATION_BINARY_TYPE_FAMILY;
new_root_y.op.type = OPERATION_BINARY_ASSIGN_TYPE;
new_root_y.rhs.type_family = COMPOSITE_OPERATION_FAMILY;
new_root_y.rhs.subtype = INVALID_SUBTYPE;
new_root_y.rhs.numeric_type = INVALID_NUMERIC_TYPE;
new_root_y.rhs.node_index = leaf.lhs.node_index;
// work on subexpression:
// TODO: Catch exception, free temporary, then rethrow
execute_composite(s, new_root_y);
// now compute x = z * / alpha:
lhs_rhs_element u = root_node.lhs;
lhs_rhs_element v = new_root_y.lhs;
lhs_rhs_element alpha = scalar_is_temporary ? scalar_temp_node.lhs : leaf.rhs;
bool is_division = (leaf.op.type == OPERATION_BINARY_DIV_TYPE);
switch (root_node.op.type)
{
case OPERATION_BINARY_ASSIGN_TYPE:
detail::ax(u,
v, alpha, 1, is_division, false);
break;
case OPERATION_BINARY_INPLACE_ADD_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, alpha, 1, is_division, false);
break;
case OPERATION_BINARY_INPLACE_SUB_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, alpha, 1, is_division, true);
break;
default:
throw statement_not_supported_exception("Unsupported binary operator for vector operation in root note (should be =, +=, or -=)");
}
detail::delete_element(new_root_y.lhs);
}
else if (leaf.lhs.type_family != COMPOSITE_OPERATION_FAMILY)
{
lhs_rhs_element u = root_node.lhs;
lhs_rhs_element v = leaf.lhs;
lhs_rhs_element alpha = scalar_is_temporary ? scalar_temp_node.lhs : leaf.rhs;
bool is_division = (leaf.op.type == OPERATION_BINARY_DIV_TYPE);
switch (root_node.op.type)
{
case OPERATION_BINARY_ASSIGN_TYPE:
detail::ax(u,
v, alpha, 1, is_division, false);
break;
case OPERATION_BINARY_INPLACE_ADD_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, alpha, 1, is_division, false);
break;
case OPERATION_BINARY_INPLACE_SUB_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, alpha, 1, is_division, true);
break;
default:
throw statement_not_supported_exception("Unsupported binary operator for vector operation in root note (should be =, +=, or -=)");
}
}
else
throw statement_not_supported_exception("Unsupported binary operator for OPERATION_BINARY_MULT_TYPE || OPERATION_BINARY_DIV_TYPE on leaf node.");
// clean up
if (scalar_is_temporary)
detail::delete_element(scalar_temp_node.lhs);
}
else if ( leaf.op.type == OPERATION_BINARY_INNER_PROD_TYPE
|| leaf.op.type == OPERATION_UNARY_NORM_1_TYPE
|| leaf.op.type == OPERATION_UNARY_NORM_2_TYPE
|| leaf.op.type == OPERATION_UNARY_NORM_INF_TYPE)
{
execute_scalar_assign_composite(s, root_node);
}
else if ( (leaf.op.type_family == OPERATION_UNARY_TYPE_FAMILY && leaf.op.type != OPERATION_UNARY_TRANS_TYPE)
|| leaf.op.type == OPERATION_BINARY_ELEMENT_PROD_TYPE
|| leaf.op.type == OPERATION_BINARY_ELEMENT_DIV_TYPE) // element-wise operations
{
execute_element_composite(s, root_node);
}
else if ( leaf.op.type == OPERATION_BINARY_MAT_VEC_PROD_TYPE
|| leaf.op.type == OPERATION_BINARY_MAT_MAT_PROD_TYPE)
{
execute_matrix_prod(s, root_node);
}
else if ( leaf.op.type == OPERATION_UNARY_TRANS_TYPE)
{
assign_trans(root_node.lhs, leaf.lhs);
}
else
throw statement_not_supported_exception("Unsupported binary operator");
}
/** @brief Deals with x = y for a scalar/vector/matrix x, y */
inline void execute_single(statement const &, statement_node const & root_node)
{
lhs_rhs_element u = root_node.lhs;
lhs_rhs_element v = root_node.rhs;
switch (root_node.op.type)
{
case OPERATION_BINARY_ASSIGN_TYPE:
detail::ax(u,
v, 1.0, 1, false, false);
break;
case OPERATION_BINARY_INPLACE_ADD_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, 1.0, 1, false, false);
break;
case OPERATION_BINARY_INPLACE_SUB_TYPE:
detail::axbx(u,
u, 1.0, 1, false, false,
v, 1.0, 1, false, true);
break;
default:
throw statement_not_supported_exception("Unsupported binary operator for operation in root note (should be =, +=, or -=)");
}
}
inline void execute_impl(statement const & s, statement_node const & root_node)
{
if ( root_node.lhs.type_family != SCALAR_TYPE_FAMILY
&& root_node.lhs.type_family != VECTOR_TYPE_FAMILY
&& root_node.lhs.type_family != MATRIX_TYPE_FAMILY)
throw statement_not_supported_exception("Unsupported lvalue encountered in head node.");
switch (root_node.rhs.type_family)
{
case COMPOSITE_OPERATION_FAMILY:
execute_composite(s, root_node);
break;
case SCALAR_TYPE_FAMILY:
case VECTOR_TYPE_FAMILY:
case MATRIX_TYPE_FAMILY:
execute_single(s, root_node);
break;
default:
throw statement_not_supported_exception("Invalid rvalue encountered in vector assignment");
}
}
}
inline void execute(statement const & s)
{
// simply start execution from the root node:
detail::execute_impl(s, s.array()[s.root()]);
}
}
} //namespace viennacl
#endif
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