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/* GTS - Library for the manipulation of triangulated surfaces
* Copyright (C) 1999 Stéphane Popinet
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_FPU_CONTROL_H
# include <fpu_control.h>
# ifdef _FPU_EXTENDED
# if !defined(__alpha__) || !defined(__GLIBC__)
# if defined(__arm__)
static fpu_control_t fpu_round_double = _FPU_DEFAULT;
# else
static fpu_control_t fpu_round_double =
(_FPU_DEFAULT & ~ _FPU_EXTENDED)|_FPU_DOUBLE;
# endif
static fpu_control_t fpu_init;
# define FPU_ROUND_DOUBLE { _FPU_GETCW(fpu_init); \
_FPU_SETCW(fpu_round_double); }
# define FPU_RESTORE {_FPU_SETCW(fpu_init);}
# else /* __alpha__ && __GLIBC__ */
# define FPU_ROUND_DOUBLE
# define FPU_RESTORE
# endif /* __alpha__ && __GLIBC__ */
# else /* not FPU_EXTENDED */
# define FPU_ROUND_DOUBLE
# define FPU_RESTORE
# endif /* not FPU_EXTENDED */
#else /* not HAVE_FPU_CONTROL_H */
# ifdef __FreeBSD__
# include <floatingpoint.h>
# define FPU_ROUND_DOUBLE (fpsetprec(FP_PD))
# define FPU_RESTORE (fpsetprec(FP_PE))
# else /* not __FreeBSD__ */
# ifdef WIN32
# ifdef _MSC_VER
# include <float.h>
static unsigned int fpu_init;
# define FPU_ROUND_DOUBLE (fpu_init = _controlfp (0, 0), \
_controlfp (_PC_53, MCW_PC))
# define FPU_RESTORE (_controlfp (fpu_init, 0xfffff))
# elif __MINGW32__
# include <float.h>
static unsigned int fpu_init;
# define FPU_ROUND_DOUBLE (fpu_init = _controlfp (0, 0), \
_controlfp (_PC_53, _MCW_PC))
# define FPU_RESTORE (_controlfp (fpu_init, 0xfffff))
# else /* not _MSC_VER or __MINGW32__ */
# error "You need MSVC or MinGW for the Win32 version"
# endif /* not _MSC_VER or __MINGW32__ */
# else /* not WIN32 */
# ifdef __CYGWIN__
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
static fpu_control_t fpu_round_double = 0x027f;
static fpu_control_t fpu_init;
# define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (*&cw))
# define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (*&cw))
# define FPU_ROUND_DOUBLE { _FPU_GETCW(fpu_init); \
_FPU_SETCW(fpu_round_double); }
# define FPU_RESTORE { _FPU_SETCW(fpu_init);}
# else /* not __CYGWIN__ */
# ifdef CPP_HAS_WARNING
# warning "Unknown CPU: assuming default double precision rounding"
# endif /* CPP_HAS_WARNING */
# define FPU_ROUND_DOUBLE
# define FPU_RESTORE
# endif /* not __CYGWIN__ */
# endif /* not WIN32 */
# endif /* not __FreeBSD__ */
#endif /* not HAVE_FPU_CONTROL_H */
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