#include "CommonUtil.h"
#include "float.h"
#include "math.h"

int fastf2i_round(float f)
{
#ifdef _WIN32
	int i;
	__asm
	{
		fld  f
			fistp i
	}
	return i;
#else
	return (int)(f + 0.5f);
#endif 
}

int fastf2i(float fValue)
{
#ifdef _WIN32
	static const float round_to_nearest = -0.499999f;
	int iValue;
	__asm 
	{
		fld  fValue
			fadd round_to_nearest
			fistp iValue
	}
	return iValue;
#else
	return (int)fValue;
#endif
}

int Float2Int( float a )
{
#ifdef _WIN32
	int CtrlwdHolder;
	int CtrlwdSetter;
	int RetVal;
	__asm 
	{
		fld    a     // push 'a' onto the FP stack
			fnstcw CtrlwdHolder   // store FPU control word
			movzx  eax, CtrlwdHolder // move and zero extend word into eax
			and    eax, 0xFFFFF3FF  // set all bits except rounding bits to 1
			or     eax, 0x00000C00  // set rounding mode bits to round down
			mov    CtrlwdSetter, eax // Prepare to set the rounding mode -- prepare to enter plaid!
			fldcw  CtrlwdSetter   // Entering plaid!
			fistp  RetVal    // Store and converted (to int) result
			fldcw  CtrlwdHolder   // Restore control word
	}
	return RetVal;
#else
	return (int)a;
#endif 
}

/// 2011.04.26 - prodongi
bool isZero(float value)
{
	if (fabs(value) < FLT_EPSILON)
		return true;
	return false;
}