mirror of
https://github.com/sunnypilot/sunnypilot.git
synced 2026-07-08 23:02:04 +08:00
George Hotz
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
// $Id$
|
|
# ifndef CPPAD_LOCAL_OPTIMIZE_HASH_CODE_HPP
|
|
# define CPPAD_LOCAL_OPTIMIZE_HASH_CODE_HPP
|
|
|
|
/* --------------------------------------------------------------------------
|
|
CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-16 Bradley M. Bell
|
|
|
|
CppAD is distributed under multiple licenses. This distribution is under
|
|
the terms of the
|
|
Eclipse Public License Version 1.0.
|
|
|
|
A copy of this license is included in the COPYING file of this distribution.
|
|
Please visit http://www.coin-or.org/CppAD/ for information on other licenses.
|
|
-------------------------------------------------------------------------- */
|
|
/*!
|
|
\file local/optimize/hash_code.hpp
|
|
CppAD hashing utility.
|
|
*/
|
|
|
|
|
|
// BEGIN_CPPAD_LOCAL_OPTIMIZE_NAMESPACE
|
|
namespace CppAD { namespace local { namespace optimize {
|
|
/*!
|
|
Specialized hash code for a CppAD operator and its arguments
|
|
(used during optimization).
|
|
|
|
\param op
|
|
is the operator that we are computing a hash code for.
|
|
|
|
\param num_arg
|
|
number of elements of arg to include in the hash code
|
|
(num_arg <= 2).
|
|
|
|
\param arg
|
|
is a vector of length num_arg
|
|
containing the corresponding argument indices for this operator.
|
|
|
|
\return
|
|
is a hash code that is between zero and CPPAD_HASH_TABLE_SIZE - 1.
|
|
*/
|
|
|
|
inline size_t optimize_hash_code(
|
|
OpCode op ,
|
|
size_t num_arg ,
|
|
const addr_t* arg )
|
|
{
|
|
//
|
|
CPPAD_ASSERT_UNKNOWN(num_arg <= 2 );
|
|
size_t sum = size_t(arg[0]) + size_t(op);
|
|
if( 1 < num_arg )
|
|
sum += size_t(arg[1]);
|
|
//
|
|
return sum % CPPAD_HASH_TABLE_SIZE;
|
|
}
|
|
|
|
} } } // END_CPPAD_LOCAL_OPTIMIZE_NAMESPACE
|
|
|
|
# endif
|