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/* Inline functions operating on enum Rounding_Dir values.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The PPL is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#ifndef PPL_Rounding_Dir_inlines_hh
#define PPL_Rounding_Dir_inlines_hh 1
#include "assert.hh"
namespace Parma_Polyhedra_Library {
inline Rounding_Dir
round_dir(Rounding_Dir dir) {
return static_cast<Rounding_Dir>(dir & ROUND_DIR_MASK);
}
inline bool
round_down(Rounding_Dir dir) {
return round_dir(dir) == ROUND_DOWN;
}
inline bool
round_up(Rounding_Dir dir) {
return round_dir(dir) == ROUND_UP;
}
inline bool
round_ignore(Rounding_Dir dir) {
return round_dir(dir) == ROUND_IGNORE;
}
inline bool
round_not_needed(Rounding_Dir dir) {
return round_dir(dir) == ROUND_NOT_NEEDED;
}
inline bool
round_not_requested(Rounding_Dir dir) {
return round_dir(dir) == ROUND_IGNORE || round_dir(dir) == ROUND_NOT_NEEDED;
}
inline bool
round_direct(Rounding_Dir dir) {
return round_dir(dir) == ROUND_DIRECT;
}
inline bool
round_inverse(Rounding_Dir dir) {
return round_dir(dir) == ROUND_INVERSE;
}
inline bool
round_strict_relation(Rounding_Dir dir) {
return dir & ROUND_STRICT_RELATION;
}
#if PPL_CAN_CONTROL_FPU
inline fpu_rounding_direction_type
round_fpu_dir(Rounding_Dir dir) {
switch (round_dir(dir)) {
case ROUND_UP:
return static_cast<fpu_rounding_direction_type>(PPL_FPU_UPWARD);
case ROUND_DOWN:
return static_cast<fpu_rounding_direction_type>(PPL_FPU_DOWNWARD);
default:
PPL_ASSERT(false);
return static_cast<fpu_rounding_direction_type>(PPL_FPU_UPWARD);
}
}
#undef PPL_FPU_DOWNWARD
#undef PPL_FPU_TONEAREST
#undef PPL_FPU_TOWARDZERO
#undef PPL_FPU_UPWARD
#endif
/*! \relates Parma_Polyhedra_Library::Rounding_Dir */
inline Rounding_Dir
inverse(Rounding_Dir dir) {
Rounding_Dir d = round_dir(dir);
switch (d) {
case ROUND_UP:
d = ROUND_DOWN;
break;
case ROUND_DOWN:
d = ROUND_UP;
break;
default:
PPL_ASSERT(false);
/* Fall through */
case ROUND_IGNORE:
return dir;
}
return static_cast<Rounding_Dir>((dir & ~ROUND_DIR_MASK) | d);
}
inline Rounding_Dir operator|(Rounding_Dir x, Rounding_Dir y) {
return static_cast<Rounding_Dir>((unsigned)x | (unsigned)y);
}
} // namespace Parma_Polyhedra_Library
#endif // !defined(PPL_Rounding_Dir_inlines_hh)
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