94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// $Id$
|
|
# ifndef CPPAD_CORE_DIV_EQ_HPP
|
|
# define CPPAD_CORE_DIV_EQ_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.
|
|
-------------------------------------------------------------------------- */
|
|
|
|
// BEGIN CppAD namespace
|
|
namespace CppAD {
|
|
|
|
template <class Base>
|
|
AD<Base>& AD<Base>::operator /= (const AD<Base> &right)
|
|
{
|
|
// compute the Base part
|
|
Base left;
|
|
left = value_;
|
|
value_ /= right.value_;
|
|
|
|
// check if there is a recording in progress
|
|
local::ADTape<Base>* tape = AD<Base>::tape_ptr();
|
|
if( tape == CPPAD_NULL )
|
|
return *this;
|
|
tape_id_t tape_id = tape->id_;
|
|
|
|
// tape_id cannot match the default value for tape_id_; i.e., 0
|
|
CPPAD_ASSERT_UNKNOWN( tape_id > 0 );
|
|
bool var_left = tape_id_ == tape_id;
|
|
bool var_right = right.tape_id_ == tape_id;
|
|
|
|
if( var_left )
|
|
{ if( var_right )
|
|
{ // this = variable / variable
|
|
CPPAD_ASSERT_UNKNOWN( local::NumRes(local::DivvvOp) == 1 );
|
|
CPPAD_ASSERT_UNKNOWN( local::NumArg(local::DivvvOp) == 2 );
|
|
|
|
// put operand addresses in tape
|
|
tape->Rec_.PutArg(taddr_, right.taddr_);
|
|
// put operator in the tape
|
|
taddr_ = tape->Rec_.PutOp(local::DivvvOp);
|
|
// make this a variable
|
|
CPPAD_ASSERT_UNKNOWN( tape_id_ == tape_id );
|
|
}
|
|
else if( IdenticalOne( right.value_ ) )
|
|
{ // this = variable * 1
|
|
}
|
|
else
|
|
{ // this = variable / parameter
|
|
CPPAD_ASSERT_UNKNOWN( local::NumRes(local::DivvpOp) == 1 );
|
|
CPPAD_ASSERT_UNKNOWN( local::NumArg(local::DivvpOp) == 2 );
|
|
|
|
// put operand addresses in tape
|
|
addr_t p = tape->Rec_.PutPar(right.value_);
|
|
tape->Rec_.PutArg(taddr_, p);
|
|
// put operator in the tape
|
|
taddr_ = tape->Rec_.PutOp(local::DivvpOp);
|
|
// make this a variable
|
|
CPPAD_ASSERT_UNKNOWN( tape_id_ == tape_id );
|
|
}
|
|
}
|
|
else if( var_right )
|
|
{ if( IdenticalZero(left) )
|
|
{ // this = 0 / variable
|
|
}
|
|
else
|
|
{ // this = parameter / variable
|
|
CPPAD_ASSERT_UNKNOWN( local::NumRes(local::DivpvOp) == 1 );
|
|
CPPAD_ASSERT_UNKNOWN( local::NumArg(local::DivpvOp) == 2 );
|
|
|
|
// put operand addresses in tape
|
|
addr_t p = tape->Rec_.PutPar(left);
|
|
tape->Rec_.PutArg(p, right.taddr_);
|
|
// put operator in the tape
|
|
taddr_ = tape->Rec_.PutOp(local::DivpvOp);
|
|
// make this a variable
|
|
tape_id_ = tape_id;
|
|
}
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
CPPAD_FOLD_ASSIGNMENT_OPERATOR(/=)
|
|
|
|
} // END CppAD namespace
|
|
|
|
# endif
|