/*** Copyright (C) 2001 Erik de Castro Lopo <erikd AT mega-nerd DOT com>**** Permission to use, copy, modify, distribute, and sell this file for any** purpose is hereby granted without fee, provided that the above copyright** and this permission notice appear in all copies.  No representations are** made about the suitability of this software for any purpose.  It is** provided "as is" without express or implied warranty.*//* Version 1.1 *//*============================================================================**	On Intel Pentium processors (especially PIII and probably P4), converting**	from float to int is very slow. To meet the C specs, the code produced by**	most C compilers targeting Pentium needs to change the FPU rounding mode**	before the float to int conversion is performed.****	Changing the FPU rounding mode causes the FPU pipeline to be flushed. It**	is this flushing of the pipeline which is so slow.****	Fortunately the ISO C99 specifications define the functions lrint, lrintf,**	llrint and llrintf which fix this problem as a side effect.****	On Unix-like systems, the configure process should have detected the**	presence of these functions. If they weren't found we have to replace them**	here with a standard C cast.*//***	The C99 prototypes for lrint and lrintf are as follows:****		long int lrintf (float x) ;**		long int lrint  (double x) ;*//*	The presence of the required functions are detected during the configure**	process and the values HAVE_LRINT and HAVE_LRINTF are set accordingly in**	the config.h file.*/#if (HAVE_LRINT && HAVE_LRINTF)	/*	These defines enable functionality introduced with the 1999 ISO C	**	standard. They must be defined before the inclusion of math.h to	**	engage them. If optimisation is enabled, these functions will be	**	inlined. With optimisation switched off, you have to link in the	**	maths library using -lm.	*/	#define	_ISOC9X_SOURCE	1	#define _ISOC99_SOURCE	1	#define	__USE_ISOC9X	1	#define	__USE_ISOC99	1	#include	<math.h>#elif (defined (WIN32) || defined (_WIN32))	#include	<math.h>	/*	Win32 doesn't seem to have these functions.	**	Therefore implement inline versions of these functions here.	*/	__inline long int	lrint (double flt)	{	int intgr;		_asm		{	fld flt			fistp intgr			};		return intgr;	}	__inline long int	lrintf (float flt)	{	int intgr;		_asm		{	fld flt			fistp intgr		};		return intgr;	}#else	#warning "Don't have the functions lrint() and lrintf ()."	#warning "Replacing these functions with a standard C cast."	#include	<math.h>	#define	lrint(dbl)		((int)(dbl))	#define	lrintf(flt)		((int)(flt))#endif